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[GMCnet] Engine vibrations & noises, broken belt [message #217697] Sat, 10 August 2013 19:37 Go to next message
fitzmorrispr is currently offline  fitzmorrispr   United States
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Location: Los Angeles
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Hey guys. Haven't fixed the air compressor switch yet, but I have fixed the
power loss under acceleration. It was indeed the fuel filter.

Today, my ac belt snapped, tangled itself in the fan. When it did, a
persistant vibration I'd been experiencing got worse, and gained an audible
component. It makes a ta-ka ta-ka sound, doing about three ta-kas per
second at idle. I thouht it might just be some bit of belt lodged in he fan
shroud brackets, and getting struck by the fan, and it might just be, but I
didn't see any pieces, and rotating the fan by hand made no sounds.

I think it's the main drive pulley off the crankshaft. It looks kinda like
its off center, as it spins. Does it have any rubber part in it, like some
of those harmonic balancers do? If so, could that wear out in such a way
that the pulley could jiggle back and forth while running?

I'll note that the ac belt is the only one putting tension on the drive
pulley towards the right side of the engine, and that obviously, it's gone
now.

Any ideas? I'll try to make a video to show you guys what I mean.
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The Greatfruit: 1973, 26', Canyon Lands or Painted Desert, in Pineapple Yellow
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217698 is a reply to message #217697] Sat, 10 August 2013 20:12 Go to previous messageGo to next message
Otterwan   United States
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Registered: July 2013
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They can go bad, although I've never seen it happen. They definitely shouldn't wobble. They are a press fit with a retaining bolt. If just the pulley is wobbling it might be bent. If the dampner itself is wobbling, figure out why fast. Failure could be catastrophic.

http://www.minimania.com/imagesbig/cam4929bad_2.jpg

http://www.minimania.com/imagesbig/cam4929bad_2.jpg


1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217720 is a reply to message #217698] Sat, 10 August 2013 23:14 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
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I saw one wobbling once on a coach at a rally. It was the bolt in the center of the crank shaft loose.



Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217804 is a reply to message #217720] Sun, 11 August 2013 14:25 Go to previous messageGo to next message
fitzmorrispr is currently offline  fitzmorrispr   United States
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Registered: February 2013
Location: Los Angeles
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Well, looking again, it didn't seem to be wobbling, but I was suspicious,
so I took the remaining belts off, and determined that it was definitely
very loose. About 40 degrees of free play in the rotation, maybe a quarter
inch side to side. Didn't have a socket large enough for the job, so left
it in the parking lot at work, got a ride home. Was thinking I would take
it off before tightening, determine if it needed replacement immediately,
or if I could get by with just a tightening, for awhile. One worry: how on
earth can I do timing when I have no idea where the pulley's suposed to sit
on the shaft?
On Aug 10, 2013 9:14 PM, "Ken Burton" <n9cv@comcast.net> wrote:

>
>
> I saw one wobbling once on a coach at a rally. It was the bolt in the
> center of the crank shaft loose.
>
>
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
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The Greatfruit: 1973, 26', Canyon Lands or Painted Desert, in Pineapple Yellow
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217820 is a reply to message #217804] Sun, 11 August 2013 15:12 Go to previous messageGo to next message
Otterwan   United States
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fitzmorrispr wrote on Sun, 11 August 2013 12:25

About 40 degrees of free play in the rotation, maybe a quarter
inch side to side.



40° rotation? Sounds like your woodruff key either sheered off or is missing. Figure that out before you tighten it up, as the assembly is balanced only when the slots on the crank and dampner are aligned and the woodruff key is keeping them that way.


1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217844 is a reply to message #217820] Sun, 11 August 2013 17:39 Go to previous messageGo to next message
fitzmorrispr is currently offline  fitzmorrispr   United States
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Yeah, I thought there might be something like that involved. Where can I
find a woodruff key at 6:30 on a sunday evening? (That's the earliest I can
work on it) what're the chances the keyway is torn?

Just to clarify, the quarter inch play is not off center, it remains
perfectly centered on the shaft, but rather that it can move maybe a
quarter inch off of perpendicular ( pulley face to shaft axis)
On Aug 11, 2013 1:12 PM, "David Orders" <dao@oarsllc.com> wrote:

>
>
> fitzmorrispr wrote on Sun, 11 August 2013 12:25
> > About 40 degrees of free play in the rotation, maybe a quarter
> > inch side to side.
>
>
> 40° rotation? Sounds like your woodruff key either sheered off or is
> missing. Figure that out before you tighten it up, as the assembly is
> balanced only when the slots on the crank and dampner are aligned and the
> woodruff key is keeping them that way.
>
> --
> 1976 Royale "Twinkie II", 1978 Palm Beach with front end fire. Lynnwood WA
>
> &#8220;Before you criticize someone, you should walk a mile in their
> shoes. That way when you criticize them, you are a mile away from them and
> you have their shoes.&#8221;
> _______________________________________________
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The Greatfruit: 1973, 26', Canyon Lands or Painted Desert, in Pineapple Yellow
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217847 is a reply to message #217804] Sun, 11 August 2013 17:45 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Location: Sydney, Australia
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Senior Member
Patrick,

It would be VERY foolish NOT to remove the harmonic balancer and inspect it and the crankshaft carefully.

Regards,
Rob M.

-----Original Message-----
From: Patrick Fitzmorris

Well, looking again, it didn't seem to be wobbling, but I was suspicious,
so I took the remaining belts off, and determined that it was definitely
very loose. About 40 degrees of free play in the rotation, maybe a quarter
inch side to side. Didn't have a socket large enough for the job, so left
it in the parking lot at work, got a ride home. Was thinking I would take
it off before tightening, determine if it needed replacement immediately,
or if I could get by with just a tightening, for awhile. One worry: how on
earth can I do timing when I have no idea where the pulley's suposed to sit
on the shaft?

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217850 is a reply to message #217697] Sun, 11 August 2013 18:06 Go to previous messageGo to next message
hnielsen2 is currently offline  hnielsen2   United States
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Registered: February 2004
Location: Alpine CA
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Bring it up to top dead canter.
Mark your pull with marker I like silver in line with the pointer
Howard
Alpine Ca

All is well with my Lord


On Aug 11, 2013, at 15:45, "Rob Mueller" <robmueller@iinet.net.au> wrote:

> Patrick,
>
> It would be VERY foolish NOT to remove the harmonic balancer and inspect it and the crankshaft carefully.
>
> Regards,
> Rob M.
>
> -----Original Message-----
> From: Patrick Fitzmorris
>
> Well, looking again, it didn't seem to be wobbling, but I was suspicious,
> so I took the remaining belts off, and determined that it was definitely
> very loose. About 40 degrees of free play in the rotation, maybe a quarter
> inch side to side. Didn't have a socket large enough for the job, so left
> it in the parking lot at work, got a ride home. Was thinking I would take
> it off before tightening, determine if it needed replacement immediately,
> or if I could get by with just a tightening, for awhile. One worry: how on
> earth can I do timing when I have no idea where the pulley's suposed to sit
> on the shaft?
>
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All is well with my Lord
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217851 is a reply to message #217850] Sun, 11 August 2013 18:08 Go to previous messageGo to next message
hnielsen2 is currently offline  hnielsen2   United States
Messages: 1434
Registered: February 2004
Location: Alpine CA
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Senior Member
Forgot pull the number one plug.
Put your finger or have someone do it over the number park plug hole.

Howard
All is well with my Lord


On Aug 11, 2013, at 16:06, Howard <hnielsen2@cox.net> wrote:

> Bring it up to top dead canter.
> Mark your pull with marker I like silver in line with the pointer
> Howard
> Alpine Ca
>
> All is well with my Lord
>
>
> On Aug 11, 2013, at 15:45, "Rob Mueller" <robmueller@iinet.net.au> wrote:
>
>> Patrick,
>>
>> It would be VERY foolish NOT to remove the harmonic balancer and inspect it and the crankshaft carefully.
>>
>> Regards,
>> Rob M.
>>
>> -----Original Message-----
>> From: Patrick Fitzmorris
>>
>> Well, looking again, it didn't seem to be wobbling, but I was suspicious,
>> so I took the remaining belts off, and determined that it was definitely
>> very loose. About 40 degrees of free play in the rotation, maybe a quarter
>> inch side to side. Didn't have a socket large enough for the job, so left
>> it in the parking lot at work, got a ride home. Was thinking I would take
>> it off before tightening, determine if it needed replacement immediately,
>> or if I could get by with just a tightening, for awhile. One worry: how on
>> earth can I do timing when I have no idea where the pulley's suposed to sit
>> on the shaft?
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
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All is well with my Lord
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217853 is a reply to message #217850] Sun, 11 August 2013 18:12 Go to previous messageGo to next message
habbyguy is currently offline  habbyguy   United States
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hnielsen2 wrote on Sun, 11 August 2013 16:06

Bring it up to top dead canter.

If I'm not mistaken, that's what people who kick dead horses are trying to get them to do...


Mark Hickey Mesa, AZ 1978 Royale Center Kitchen
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217857 is a reply to message #217853] Sun, 11 August 2013 18:26 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
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Location: Belmont, CA
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Senior Member
Most of the time, the key will stay on the shaft.
Pull the Harmonic all the way off and see.
The grove on the crank will help you to know where to slide it in

On Sun, Aug 11, 2013 at 4:12 PM, Mark <mark@habcycles.com> wrote:

>
>
> hnielsen2 wrote on Sun, 11 August 2013 16:06
> > Bring it up to top dead canter.
>
> If I'm not mistaken, that's what people who kick dead horses are trying to
> get them to do...
> --
> Mark Hickey
> Mesa, AZ
> 1978 Royale Center Kitchen
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--
Jim Kanomata
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jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217859 is a reply to message #217844] Sun, 11 August 2013 18:37 Go to previous messageGo to next message
James Hupy is currently offline  James Hupy   United States
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Patrick, what you have is more than likely a failed harmonic balancer. The
rubber that bonds the two pieces together has failed.. You are not going to
get close to tdc so don't worry about it. Remove the crankshaft bolt, it
should be quite tight. An electric impact wrench may do the trick if you do
not have a pneumatic one or air where you are located. Sometimes the
harmonic balancer will just slide off, sometimes you need a puller. Auto
Zone rents them. I use a 5# slide hammer with an adapter. Both will work.
You are going to need another harmonic balancer. Should be off a 455 if
that is the engine you have. Call the Jim's and get one on the way..
Hope this helps.
Jim Hupy
Salem, Or
78 Gmc Royale 403
On Aug 11, 2013 3:39 PM, "Patrick Fitzmorris" <fitzmorrispr@gmail.com>
wrote:

> Yeah, I thought there might be something like that involved. Where can I
> find a woodruff key at 6:30 on a sunday evening? (That's the earliest I can
> work on it) what're the chances the keyway is torn?
>
> Just to clarify, the quarter inch play is not off center, it remains
> perfectly centered on the shaft, but rather that it can move maybe a
> quarter inch off of perpendicular ( pulley face to shaft axis)
> On Aug 11, 2013 1:12 PM, "David Orders" <dao@oarsllc.com> wrote:
>
> >
> >
> > fitzmorrispr wrote on Sun, 11 August 2013 12:25
> > > About 40 degrees of free play in the rotation, maybe a quarter
> > > inch side to side.
> >
> >
> > 40° rotation? Sounds like your woodruff key either sheered off or is
> > missing. Figure that out before you tighten it up, as the assembly is
> > balanced only when the slots on the crank and dampner are aligned and the
> > woodruff key is keeping them that way.
> >
> > --
> > 1976 Royale "Twinkie II", 1978 Palm Beach with front end fire. Lynnwood
> WA
> >
> > &#8220;Before you criticize someone, you should walk a mile in their
> > shoes. That way when you criticize them, you are a mile away from them
> and
> > you have their shoes.&#8221;
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> >
> _______________________________________________
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Re: [GMCnet] Engine vibrations & noises, broken belt [message #217892 is a reply to message #217859] Sun, 11 August 2013 21:18 Go to previous messageGo to next message
fitzmorrispr is currently offline  fitzmorrispr   United States
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Location: Los Angeles
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Senior Member
Well, James, it's actually not the balancer, i don't think. The whole
pulley and balancer assy is loose, and rotates on the engine's shaft, by
about 40 degrees, and can be put a few degrees off of straight
the bolt you speak of is loose, the balancer seems to still be bonded
tightly to itself


On Sun, Aug 11, 2013 at 4:37 PM, James Hupy <jamesh1296@gmail.com> wrote:

> Patrick, what you have is more than likely a failed harmonic balancer. The
> rubber that bonds the two pieces together has failed.. You are not going to
> get close to tdc so don't worry about it. Remove the crankshaft bolt, it
> should be quite tight. An electric impact wrench may do the trick if you do
> not have a pneumatic one or air where you are located. Sometimes the
> harmonic balancer will just slide off, sometimes you need a puller. Auto
> Zone rents them. I use a 5# slide hammer with an adapter. Both will work.
> You are going to need another harmonic balancer. Should be off a 455 if
> that is the engine you have. Call the Jim's and get one on the way..
> Hope this helps.
> Jim Hupy
> Salem, Or
> 78 Gmc Royale 403
> On Aug 11, 2013 3:39 PM, "Patrick Fitzmorris" <fitzmorrispr@gmail.com>
> wrote:
>
> > Yeah, I thought there might be something like that involved. Where can I
> > find a woodruff key at 6:30 on a sunday evening? (That's the earliest I
> can
> > work on it) what're the chances the keyway is torn?
> >
> > Just to clarify, the quarter inch play is not off center, it remains
> > perfectly centered on the shaft, but rather that it can move maybe a
> > quarter inch off of perpendicular ( pulley face to shaft axis)
> > On Aug 11, 2013 1:12 PM, "David Orders" <dao@oarsllc.com> wrote:
> >
> > >
> > >
> > > fitzmorrispr wrote on Sun, 11 August 2013 12:25
> > > > About 40 degrees of free play in the rotation, maybe a quarter
> > > > inch side to side.
> > >
> > >
> > > 40° rotation? Sounds like your woodruff key either sheered off or is
> > > missing. Figure that out before you tighten it up, as the assembly is
> > > balanced only when the slots on the crank and dampner are aligned and
> the
> > > woodruff key is keeping them that way.
> > >
> > > --
> > > 1976 Royale "Twinkie II", 1978 Palm Beach with front end fire. Lynnwood
> > WA
> > >
> > > &#8220;Before you criticize someone, you should walk a mile in their
> > > shoes. That way when you criticize them, you are a mile away from them
> > and
> > > you have their shoes.&#8221;
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> > >
> > _______________________________________________
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> >
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The Greatfruit: 1973, 26', Canyon Lands or Painted Desert, in Pineapple Yellow
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217899 is a reply to message #217892] Sun, 11 August 2013 22:02 Go to previous messageGo to next message
WD0AFQ is currently offline  WD0AFQ   United States
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Senior Member
I had to replace a harmonic balancer back in 08 at Amana Convention. You may need a special puller. I had one but did not need it. Got the balancer at a local Autozone. It is now on it's 3rd engine.
Dan


3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217902 is a reply to message #217892] Sun, 11 August 2013 22:13 Go to previous messageGo to next message
kerry pinkerton is currently offline  kerry pinkerton   United States
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fitzmorrispr wrote on Sun, 11 August 2013 21:18

Well, James, it's actually not the balancer, i don't think. The whole
pulley and balancer assy is loose, and rotates on the engine's shaft, by
about 40 degrees, and can be put a few degrees off of straight
the bolt you speak of is loose, the balancer seems to still be bonded
tightly to itself



Sounds like the key is stripped. I don't understand why it doesn't freely rotate however. Regardless, it needs to come off.


Kerry Pinkerton - North Alabama Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217912 is a reply to message #217892] Sun, 11 August 2013 22:49 Go to previous messageGo to next message
Carl S. is currently offline  Carl S.   United States
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Karma: 13
Senior Member

You will most likely have to replace the balancer, but not because the two pieces separated. I was working on my son's '71 Jeepster and the timing marks didn't make any sense. I thought the outer ring on the balancer might have slipped. When I went to remove the big bolt at the end of the crankshaft that holds it on, I found it loose. The balancer slid off the end of the crankshaft without a puller. The problem was that the bolt had come loose and the balancer was rotating back and fourth on the shaft. It must have started with a very small amount of play in the slot. but by the time I got to working on it. it had hammered out the slot to over an inch wide. I think you will find a condition much like this when you remove your balancer. I went on to replace the timing chain set and tensioner, and installed a new balancer, and was finally able to set the timing by the marks.

Carl Stouffer '75 ex Palm Beach Tucson, AZ. Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217916 is a reply to message #217912] Sun, 11 August 2013 23:02 Go to previous messageGo to next message
Carl S. is currently offline  Carl S.   United States
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Location: Tucson, AZ.
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Senior Member

Carl S. wrote on Sun, 11 August 2013 20:49

You will most likely have to replace the balancer, but not because the two pieces separated. I was working on my son's '71 Jeepster and the timing marks didn't make any sense. I thought the outer ring on the balancer might have slipped. When I went to remove the big bolt at the end of the crankshaft that holds it on, I found it loose. The balancer slid off the end of the crankshaft without a puller. The problem was that the bolt had come loose and the balancer was rotating back and fourth on the shaft. It must have started with a very small amount of play in the slot. but by the time I got to working on it. it had hammered out the slot to over an inch wide. I think you will find a condition much like this when you remove your balancer. I went on to replace the timing chain set and tensioner, and installed a new balancer, and was finally able to set the timing by the marks.



Oh, the above was on a 225 V-6. The key was in place ans hardly damaged, just the balancer hub.


Carl Stouffer '75 ex Palm Beach Tucson, AZ. Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
Re: [GMCnet] Engine vibrations & noises, broken belt [message #217933 is a reply to message #217916] Mon, 12 August 2013 01:15 Go to previous messageGo to next message
fitzmorrispr is currently offline  fitzmorrispr   United States
Messages: 137
Registered: February 2013
Location: Los Angeles
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Senior Member
That sounds like it might just be what I'm experiencing...
I'll be pulling it in the morning, and we'll see what's what.
On Aug 11, 2013 9:03 PM, "Carl Stouffer" <carljr3b@yahoo.com> wrote:

>
>
> Carl S. wrote on Sun, 11 August 2013 20:49
> > You will most likely have to replace the balancer, but not because the
> two pieces separated. I was working on my son's '71 Jeepster and the
> timing marks didn't make any sense. I thought the outer ring on the
> balancer might have slipped. When I went to remove the big bolt at the end
> of the crankshaft that holds it on, I found it loose. The balancer slid
> off the end of the crankshaft without a puller. The problem was that the
> bolt had come loose and the balancer was rotating back and fourth on the
> shaft. It must have started with a very small amount of play in the slot.
> but by the time I got to working on it. it had hammered out the slot to
> over an inch wide. I think you will find a condition much like this when
> you remove your balancer. I went on to replace the timing chain set and
> tensioner, and installed a new balancer, and was finally able to set the
> timing by the marks.
>
>
>
> Oh, the above was on a 225 V-6. The key was in place ans hardly damaged,
> just the balancer hub.
> --
> Carl S.
> '75 ex Palm Beach
> Tucson, AZ.
> _______________________________________________
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The Greatfruit: 1973, 26', Canyon Lands or Painted Desert, in Pineapple Yellow
Re: [GMCnet] Engine vibrations & noises, broken belt [message #218034 is a reply to message #217933] Mon, 12 August 2013 15:57 Go to previous messageGo to next message
fitzmorrispr is currently offline  fitzmorrispr   United States
Messages: 137
Registered: February 2013
Location: Los Angeles
Karma: 0
Senior Member
Well, I have pulled the balancer, and sure enough, the keyway is hammered
out to nearly an inch wide. Seems somebody put a precut key on that was too
long, and tightened the bolt down on the end of the key, rather than the
balancer itself, giving it all the wiggle room it needed.

Bought some keystock and ordered a new balancer and front seal thru
O'Reilly. Should have it all back together sometime tonight!

I'm betting this'll solve some of the vibration issues I've been having...
On Aug 11, 2013 11:15 PM, "Patrick Fitzmorris" <fitzmorrispr@gmail.com>
wrote:

> That sounds like it might just be what I'm experiencing...
> I'll be pulling it in the morning, and we'll see what's what.
> On Aug 11, 2013 9:03 PM, "Carl Stouffer" <carljr3b@yahoo.com> wrote:
>
>>
>>
>> Carl S. wrote on Sun, 11 August 2013 20:49
>> > You will most likely have to replace the balancer, but not because the
>> two pieces separated. I was working on my son's '71 Jeepster and the
>> timing marks didn't make any sense. I thought the outer ring on the
>> balancer might have slipped. When I went to remove the big bolt at the end
>> of the crankshaft that holds it on, I found it loose. The balancer slid
>> off the end of the crankshaft without a puller. The problem was that the
>> bolt had come loose and the balancer was rotating back and fourth on the
>> shaft. It must have started with a very small amount of play in the slot.
>> but by the time I got to working on it. it had hammered out the slot to
>> over an inch wide. I think you will find a condition much like this when
>> you remove your balancer. I went on to replace the timing chain set and
>> tensioner, and installed a new balancer, and was finally able to set the
>> timing by the marks.
>>
>>
>>
>> Oh, the above was on a 225 V-6. The key was in place ans hardly damaged,
>> just the balancer hub.
>> --
>> Carl S.
>> '75 ex Palm Beach
>> Tucson, AZ.
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
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The Greatfruit: 1973, 26', Canyon Lands or Painted Desert, in Pineapple Yellow
Re: [GMCnet] Engine vibrations & noises, broken belt [message #218066 is a reply to message #218034] Mon, 12 August 2013 20:37 Go to previous messageGo to previous message
fitzmorrispr is currently offline  fitzmorrispr   United States
Messages: 137
Registered: February 2013
Location: Los Angeles
Karma: 0
Senior Member
Hum.

The instructions that came with the new balancer say not to use the bolt to
install it, but rather a tool with a thrust bearing on threaded rod.

But I have no funds to make a deposit on the tool, and will not have funds
until friday. And I cannot leave the thing sitting in this lot much longer.
could I use the bolt to press it on, if I make sure to back it off and
repress multiple times? (I was thinking like ten times...)

Or maybe there's another way?
On Aug 12, 2013 1:57 PM, "Patrick Fitzmorris" <fitzmorrispr@gmail.com>
wrote:

> Well, I have pulled the balancer, and sure enough, the keyway is hammered
> out to nearly an inch wide. Seems somebody put a precut key on that was too
> long, and tightened the bolt down on the end of the key, rather than the
> balancer itself, giving it all the wiggle room it needed.
>
> Bought some keystock and ordered a new balancer and front seal thru
> O'Reilly. Should have it all back together sometime tonight!
>
> I'm betting this'll solve some of the vibration issues I've been having...
> On Aug 11, 2013 11:15 PM, "Patrick Fitzmorris" <fitzmorrispr@gmail.com>
> wrote:
>
>> That sounds like it might just be what I'm experiencing...
>> I'll be pulling it in the morning, and we'll see what's what.
>> On Aug 11, 2013 9:03 PM, "Carl Stouffer" <carljr3b@yahoo.com> wrote:
>>
>>>
>>>
>>> Carl S. wrote on Sun, 11 August 2013 20:49
>>> > You will most likely have to replace the balancer, but not because the
>>> two pieces separated. I was working on my son's '71 Jeepster and the
>>> timing marks didn't make any sense. I thought the outer ring on the
>>> balancer might have slipped. When I went to remove the big bolt at the end
>>> of the crankshaft that holds it on, I found it loose. The balancer slid
>>> off the end of the crankshaft without a puller. The problem was that the
>>> bolt had come loose and the balancer was rotating back and fourth on the
>>> shaft. It must have started with a very small amount of play in the slot.
>>> but by the time I got to working on it. it had hammered out the slot to
>>> over an inch wide. I think you will find a condition much like this when
>>> you remove your balancer. I went on to replace the timing chain set and
>>> tensioner, and installed a new balancer, and was finally able to set the
>>> timing by the marks.
>>>
>>>
>>>
>>> Oh, the above was on a 225 V-6. The key was in place ans hardly
>>> damaged, just the balancer hub.
>>> --
>>> Carl S.
>>> '75 ex Palm Beach
>>> Tucson, AZ.
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>
>>
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