| [GMCnet] getting the darn valve covers to not leak [message #209525] |
Sat, 01 June 2013 12:22  |
KB
Messages: 1262
Registered: September 2009
Karma: 0
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Senior Member |
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Got any tips for sealing the valve covers? Can't
seem to keep the oil on the inside. I tried installing
thicker gaskets, and also hammering the bolt holes
on the cover flat (from where the bolts had deformed
the sheet metal). I thought about RTV, but want
to be able to still remove them in future.
So what works? Or are leaky valve covers just part
of the "charm"...
thanks
Karen
1973 23'
1975 26'
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Karen
1975 26'
San Jose, CA
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| Re: [GMCnet] getting the darn valve covers to not leak [message #209532 is a reply to message #209525] |
Sat, 01 June 2013 12:58  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Karen,
Before I can answer this I need to know what kind of valve cover gaskets you have, cork, rubber, or composite. Also what brand are
they.
Regards,
Rob M.
-----Original Message-----
From: KB
Got any tips for sealing the valve covers? Can't
seem to keep the oil on the inside. I tried installing
thicker gaskets, and also hammering the bolt holes
on the cover flat (from where the bolts had deformed
the sheet metal). I thought about RTV, but want
to be able to still remove them in future.
So what works? Or are leaky valve covers just part
of the "charm"...
thanks
Karen
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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
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| Re: [GMCnet] getting the darn valve covers to not leak [message #209555 is a reply to message #209525] |
Sat, 01 June 2013 18:36 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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Shitcan the gaskets. Use hi temp orange RTV. Done.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] getting the darn valve covers to not leak [message #209565 is a reply to message #209525] |
Sat, 01 June 2013 19:18 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Senior Member |
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When I got my coach, both valve covers leaked. When I went to replace them, one had a gasket and one had RTV only. The RTV only one leaked worse than the one with the gasket. I installed FelPro composite gaskets and used gray RTV on both sides. I figure, with a non adjustable valve train, there was no reason to glue them on with the RTV. It's been holding fine for over four years.
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: [GMCnet] getting the darn valve covers to not leak [message #209572 is a reply to message #209569] |
Sat, 01 June 2013 20:26 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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| KB wrote on Sat, 01 June 2013 17:51 |
> Shitcan the gaskets. Use hi temp orange RTV. Done.
Do you have to cut it apart later to get the covers off again?
I suspect this engine may be coming out soon, so don't want
to make it too difficult to get the covers off.
thanks
Karen
1973 23'
1975 26'
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If you're thinking the engine will be coming out soon, just use RTV on one side like Howard suggested. They will break loose with some extra prying, even with RTV on both sides.
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: [GMCnet] getting the darn valve covers to not leak [message #209574 is a reply to message #209525] |
Sat, 01 June 2013 20:54 |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
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I agree with using RTV on both sides. A couple months ago when we did the crossover block, we installed new gaskets on CLEANED WITH LACQUER THINNER metal...really, really clean. That is, keep cleaning the metal until you get nothing on the thinner damp rag.
Then we put a thin layer of RTV on each the valve cover, installed the gasket, and put a thin layer on the gasket before installing it on the head. No leak for the few miles it was driven but it was not hard to get off. Just bumped it with a block of wood and it peeled off.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
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| Re: [GMCnet] getting the darn valve covers to not leak [message #209581 is a reply to message #209574] |
Sat, 01 June 2013 21:24 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Someone makes a valvee cover gasket that is a piece of steel sandwiched between two pieces of cork. I went through what you are and the ribber ones were the worse. I do not have the part number right now because I'm sitting in my car at the work rally. Bob Burkitt has the number. Send him and email and I'm sure he will have the number for you.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] getting the darn valve covers to not leak [message #209586 is a reply to message #209545] |
Sat, 01 June 2013 22:22 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Karen,
When the guys at the COOP replaced the black rubber valve cover gaskets on Double Trouble I had them use black RTV to attach them to
the valve cover. To make sure they stayed in place I tied the gaskets in place with a piece of thread through each bolt hole.
They allowed the RTV to cure for a hour or so then put a VERY light coat of RTV on the gaskets and quickly set the valve covers on
the head. They finger tighten them using a nut driver. I "torqued" them myself with the same nut driver. No leaks to date.
Regards,
Rob M.
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of KB
Sent: Saturday, June 01, 2013 5:31 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] getting the darn valve covers to not leak
> Before I can answer this I need to know what kind of valve cover gaskets you have, cork, rubber, or composite. Also what brand are
> they.
They're black rubber, can't remember the brand now. I'm
happy to change them to something else if it works better.
thanks
Karen
1973 23'
1975 26'
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_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] getting the darn valve covers to not leak [message #209588 is a reply to message #209581] |
Sun, 02 June 2013 01:08 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| Ken Burton wrote on Sat, 01 June 2013 21:24 |
Someone makes a valvee cover gasket that is a piece of steel sandwiched between two pieces of cork. I went through what you are and the ribber ones were the worse. I do not have the part number right now because I'm sitting in my car at the work rally. Bob Burkitt has the number. Send him and email and I'm sure he will have the number for you.
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I believe the part number that you want is Mr. Gasket 5875 . It is a steel core, rubberized cork gasket.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] getting the darn valve covers to not leak [message #209589 is a reply to message #209565] |
Sun, 02 June 2013 01:12 |
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hnielsen2
Messages: 1434
Registered: February 2004
Location: Alpine CA
Karma: 0
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Senior Member |
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Same as I posted FelPro RTV on the covers only.
I have the same setup on our 1950 Chevy pickup with the 58 261 engine.
No leaks.
Howard
26' Canyon Lands.
All is well with my Lord
On Jun 1, 2013, at 5:18 PM, Carl Stouffer <carljr3b@yahoo.com> wrote:
>
>
> When I got my coach, both valve covers leaked. When I went to replace them, one had a gasket and one had RTV only. The RTV only one leaked worse than the one with the gasket. I installed FelPro composite gaskets and used gray RTV on both sides. I figure, with a non adjustable valve train, there was no reason to glue them on with the RTV. It's been holding fine for over four years.
> --
> 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
_______________________________________________
GMCnet mailing list
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