| Saving your dash blower and circuitry [message #333075] |
Tue, 05 June 2018 08:25  |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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I've been slowly getting all systems working on a 91 ZR1 I got for a song. 100% stock but maintanance deprived. Not PO hacked. Neglected. Yesterday the dash blower quit on C68 touch climate stopped. 10 speed so I'm thinking head unit or solid state motor speed controller. Basclly same motor GM used on the TZE but with newer weatherpak connector. Figured I'd work backwards from the motor. You have to loosen the inner fender liner for clearance (sound familiar to TZE?). I was pretty sure it was an electronics issue as no tell tale squeeling before it quit. But no, could not even turn squirrel cage by hand. Zoom Spout oiler and a couple drops on each bearing and some gentle persuasion and it began to free up. I also spray flush the commutator and brushes with Caig F5. This used to be called MCL. Moving contact lubricant for carbon and plastic potentiometers and such. This cleans and the liquid leaving takes used carbon material away. Leaves behind a very light lubrication film designed for wiper on carbon resistor. Not unlike brushes on commutator. I was prepared to head to NAPA but this ran so smoothly and quietly I put it back together and saved the trip. Perhaps lubricating all fan motors every 2 years would be a good habit in the TZEs. Sit out in zub zero and then heat soak above 200F when you shut down after highway run. Lubricants off gas and gum. Then the cooling air diminishes to motor and resistor as the Amp draw rises. Usually melts at resistor connector or Hi relay or if you are unlucky at dash. Total cost was about a penny's worth of zoom oil and about $1 of F5 spray but that was not required to get it operational. It's also a good Idea to blow out road dirt and cottonwood etc as a first step before oiling but this one was pretty clean.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Saving your dash blower and circuitry [message #333121 is a reply to message #333075] |
Wed, 06 June 2018 11:53  |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Hope that works for you John. I did the same thing after the new blower motor I ordered from Applied didn't fit, blew all the old dirt out, and lubricated the bearings, anyway. It lasted about a year and then started making a bunch of noise again. I replaced the motor with a locally sourced part for less than $40.00.
I agree it might be good maintenance practice to do just as you described regularly though. It would undoubtedly extend the lives of our various electric motors.
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
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| Re: Saving your dash blower and circuitry [message #333122 is a reply to message #333075] |
Wed, 06 June 2018 12:02 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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Carl, once they "squeal " the bearing tolerances seem excessive and the fix may not last as expected. This one never made noise but gummed up like cement. But if you keep them lubed they never get to that point. Now if you could get a spec of Synpower in there with a needle injector somehow it would outlast us all. I was ready to get a new one but wanted exact appearance as Corvette. We shall see.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Saving your dash blower and circuitry [message #333139 is a reply to message #333121] |
Wed, 06 June 2018 18:37 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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After a more than a few attempts at revitalizing electric motor bearings I
have determined that the best possible result of a bearing failure fix with
lube injection is temporary continuation of operation followed by a
repeated but more final failure. Your results may vary.
Sully
Coachless
Bellevue.
On Wed, Jun 6, 2018 at 1:14 PM Carl Stouffer wrote:
> Hope that works for you John. I did the same thing after the new blower
> motor I ordered from Applied didn't fit, blew all the old dirt out, and
> lubricated the bearings, anyway. It lasted about a year and then started
> making a bunch of noise again. I replaced the motor with a locally sourced
> part for less than $40.00.
>
> I agree it might be good maintenance practice to do just as you described
> regularly though. It would undoubtedly extend the lives of our various
> electric motors.
>
> --
> 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
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Saving your dash blower and circuitry [message #333148 is a reply to message #333141] |
Wed, 06 June 2018 20:24 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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My daughter just completed her undergraduate work at Princeton(we r
currently @ a hotel at Newark airport toward bringing her home TEMPORARILY
while she finalizes short term work plans building toward her return to
graduate school)
The Boy starts at the UW in the fall and picked up a full bike sponsorship
a few months ago for off road racing this season( currently mid season).
His “ free” bike is exceptional aside from its ability to consistently hold
together. We spent the eve of our departure for graduation re installing
the motor we pulled a couple weeks earlier due to a trans failure which
plucked a podium out from under him so that he could train prior to his
joining us in Jersey for the commencement. Upon installation and heat
cycling the fresh motor for use we discovered a super wierd cylinder leak
which appears to be a casting flaw. The reason I drag all this in front of
your eyes is to underscore the fact that I do not have time or energy to
dedicate to maintaining a GMC right now and I cannot let it sit neglected
in front of my shop for another winter. MAYBE once The Boy has left for
college in a few months and I begin to settle in to the empty nest I might
feel the need to acquire a GMC to claim my free time. Right now there is
none to claim and Recherche wants to go camping.
Sully
She leaves tomorrow
Bellevue
On Wed, Jun 6, 2018 at 7:53 PM Steve Weinstock
wrote:
> Sully
> Coachless
> Bellevue.
>
> Sully - that's such a sad signature line... Is there another coach in
> your near future ?? C'mon.
>
>
> Steve W
> 1973 23' Yellow
> southern California
>
>
>
> _______________________________________________
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>
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: Saving your dash blower and circuitry [message #333230 is a reply to message #333075] |
Fri, 08 June 2018 11:20 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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John, dpes it have the Mercury Marine (a;uminum 4 cam) engine?
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Saving your dash blower and circuitry [message #333242 is a reply to message #333075] |
Fri, 08 June 2018 18:09 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Friend had one, it was a screamer when it got up on the pipes. He said the only concern was the chain wheels on the cam which were small to clear the car's body. Any truth to that
?
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Saving your dash blower and circuitry [message #333261 is a reply to message #333075] |
Sat, 09 June 2018 09:58 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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I think the all steel cam chain drive system is pretty soilid. The hyd chain tensioners like clean 10W-30. I have heard that runs up to the red line when shifting are ok, but don't stay above 6500 all day due to possible foaming and cavitation. If you want a car with cold piston slap this is it. They are built loose in that respect.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Saving your dash blower and circuitry [message #333289 is a reply to message #333265] |
Sat, 09 June 2018 15:08 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Lot to be said for firing every cylinder every time it comes to the top.
With enough air fuel in the crankcase, it is possible to achieve greater
than 1 atmosphere of pressure in the upper cylinder before the reed valves
close. Beaucoup horsepower, lotsa' RPM's. Great when you have the whole
ocean to carry off the heat that it makes.
Jim Hupy
On Sat, Jun 9, 2018, 8:22 AM Johnny Bridges via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Mercury Marine has the technology for aluminum stuff that produced much
> power... especially in two stroke stuff, where they learned hpw much room to
> leave for expansion when things get warm. That seems to have carried
> over. A GM guy was quoted someplace saying the folks in Stillwater can
> take a
> CAD where three machined parts meet at angles, and build it and it fits
> and doesn't leak.
> I wonder could you fit megaphones on like the old Merc 60H :) Surely
> Kiekhaefer(sp?) would approve.
>
> --johnny
>
> --
> 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> "I forgive them all, save those who hurt the dogs. They must answer to me
> in hell" - ol Andy, paraphrased
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Surely Kiekhaefer(sp?) would approve.