| Re: Freeze Plugs- what do i need to know ? [message #351574 is a reply to message #351570] |
Sat, 25 January 2020 14:47  |
hertfordnc
Messages: 1164
Registered: September 2009
Location: East NC
Karma: 0
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Bullitthead wrote on Sat, 25 January 2020 08:50I have had some leak after installation without some kind of sealer, and then had to go get another plug because removal distorts the plug.  So now I use the Indian Head shellac or Permatex #2 on them to avoid that possible scenario.
Yes, that's exactly what happened. It came out easy enough with small flat punch. I sanded the hole smooth and pushed the new one in and it leaks a bit. Not a big deal.
As i had to drop the exhaust manifold to get to it and i did not have a replacement gasket, I'll be revisiting this whole thing as soon as the new gasket arrives.
Dave & Ellen Silva
Hertford, NC
76 Birchaven, 1-ton and other stuff
Currently planning the Great american Road Trip Summer 2021
It's gonna take a lot of Adderall to get this thing right.
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| Re: [GMCnet] Freeze Plugs- what do i need to know ? [message #351689 is a reply to message #351451] |
Mon, 20 January 2020 10:13 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Good on ya, Dave!
D C "Mac" Macdonald
Amateur Radio K2GKK
Since 30 November '53
USAF and FAA, Retired
Member GMCMI & Classics
Oklahoma City, OK
"The Money Pit"
TZE166V101966
'76 ex-Palm Beach
k2gkk + hotmail dot com
________________________________
From: Gmclist on behalf of Dave Silva via Gmclist
Sent: Monday, January 20, 2020 10:09
To: gmclist@list.gmcnet.org
Cc: dave silva
Subject: Re: [GMCnet] Freeze Plugs- what do i need to know ?
JohnL455 wrote on Mon, 20 January 2020 09:11
> Never run just water. CORROSION let alone freeze damage. I'd replace the leaking ones and add coolant for now, until further investigation can
> happen.
Forgive me for I am a SINNER!
I've had the coach 10 years, for about seven of those years I really wanted it gone. But now i have two boys and they love it so we are diving back
in with family support.
--
Dave & Ellen Silva
1972 Revcon Olds 455, toro drive train. All Stock
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| Re: [GMCnet] Freeze Plugs- what do i need to know ? [message #351690 is a reply to message #351443] |
Mon, 20 January 2020 08:38 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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General motors use a pellet to put in the cooling system to help seal small
leaks on a new engine they sell.
Depending on what you think, it is a fast anf inexpensive way to fix.
On Mon, Jan 20, 2020 at 6:22 AM dave silva via Gmclist <
gmclist@list.gmcnet.org> wrote:
> The Revcon has not been run much for years, it's still not driving (brakes)
>
> I was running it up to temp to set up the controller for the electric fan
> when steam began coming out of the right rear of the engine.
>
> I was pretty happy to diagnose a freeze plug rather than a head gasket.
>
> So, should i replace as many as i can reach or just the bad one?
>
> Are some more likely to fail than others?
>
> This engine has had mostly just water in it for the last few years
>
>
>
> --
> Dave & Ellen Silva
>
> 1972 Revcon Olds 455, toro drive train. All Stock
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmcrvparts.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Freeze Plugs- what do i need to know ? [message #351694 is a reply to message #351689] |
Mon, 20 January 2020 11:39 |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
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The use of water out of the tape for cooling systems IMPHO is a NO NO! I
have always use distilled water, it is very inexpensive and typically about
90 cents a gallon depending on what part of the county you live in. Tap
water has your minerals of the day depending where you live. We spend our
winters here in Tucson and the water here is from the Colorado river and
many deep wells (150+) in the Tucson area. The water here is high in
minerals including carbonates and is fairly hard (ave of 215 mg/L) You can
really see the carbonates if you look at the walls of Lake Mead is most
noticeable when you look at pictures of Hoover Dam and the white appearing
walls. of the lake. The first year we were here in winter 2010/2011 the
fixtures of the bath and kitchen sink had a white powder buildup by the
time we ended our 4 1/2 month stay. I later years we used a water
softener to reduce the mineral load and it worked reasonably well.
Sorry for the long winded comments, but if you use tap water you are
creating your own problems, again IMPHO. Use only a quality antifreeze and
dilute to a 50/50 mixture, I make my own by using a empty 1 gallon
container and filling it half way with antifreeze and the balance with
distilled water and continue until I make about 6 gallons of 50/50 mix.
You need this much for a flush and change and I have an auxiliary HVAC unit
in the coach that requires extra coolant. I always carry a gallon of mix
for top-off of the coolant reservoir. In a pinch while on the road you can
use the premix that is sold, but you are paying for very very expensive
water (1/2 gal AF @ $4.50 & 1/2 gal of H2O $4.50) That make the water coat
$9 per gal. You can make your own 50/50 mix of antifreeze for +/- $11 a
gal and distilled H20 for 80 cents for a total of $12 +/- for 2 gal of
antifreeze for your coach at about half the cost of premix of the same
volume.
The real expert is Emery who sold antifreeze products for Dow and know the
ins and outs.
Again just IMPHO and you can do and spend as you wish.
Regards,
J.R. Wright
GMC Great Laker
GMCGL Tech Editor
GMC Eastern States
GMCMHI
TZE Zone Restorations
78 Buskirk Custom 29.5' Stretch
75 Avion (Under going Frame up Restoration)
On Location in Tucson ( We don't do winter)
On Mon, Jan 20, 2020 at 9:14 AM D C _Mac_ Macdonald via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Good on ya, Dave!
>
> D C "Mac" Macdonald
> Amateur Radio K2GKK
> Since 30 November '53
> USAF and FAA, Retired
> Member GMCMI & Classics
> Oklahoma City, OK
> "The Money Pit"
> TZE166V101966
> '76 ex-Palm Beach
> k2gkk + hotmail dot com
>
> ________________________________
> From: Gmclist on behalf of Dave Silva
> via Gmclist
> Sent: Monday, January 20, 2020 10:09
> To: gmclist@list.gmcnet.org
> Cc: dave silva
> Subject: Re: [GMCnet] Freeze Plugs- what do i need to know ?
>
> JohnL455 wrote on Mon, 20 January 2020 09:11
>> Never run just water. CORROSION let alone freeze damage. I'd replace the
> leaking ones and add coolant for now, until further investigation can
>> happen.
>
> Forgive me for I am a SINNER!
>
> I've had the coach 10 years, for about seven of those years I really
> wanted it gone. But now i have two boys and they love it so we are diving
> back
> in with family support.
>
>
>
> --
> Dave & Ellen Silva
>
> 1972 Revcon Olds 455, toro drive train. All Stock
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] Freeze Plugs- what do i need to know ? [message #351698 is a reply to message #351471] |
Mon, 20 January 2020 17:38 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Original pressure caps were 9 psi. Heater core is the weak link in the GMC.
The new aluminum radiators come with a 15 psi cap. So they will test to
that pressure. But, the heater core may not.
Jim Hupy
Salem, Oregon
On Mon, Jan 20, 2020, 3:28 PM Bruce Hislop via Gmclist <
gmclist@list.gmcnet.org> wrote:
> You can correct me if I'm wrong, and I probably am wrong... but isn't the
> rad cap of the GMC rated for 9 PSI and over 12PSI can balloon the
> radiator...
> So I would not test it over 9 or 10 PSI.
>
> Just my farmboy shade-tree mechanic way of seeing things.
>
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
>
> _______________________________________________
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