292 side cover Leak - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Longhornss · 07-30-2015, 12:33 PM

Hello all does anyone have a good fix for stopping the side covers from leaking on a 292?
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**'68OrangeSunshine** · 07-30-2015, 02:52 PM

Clean the block w/ degreaser and a high power spray so you can see if you still have a new leak. Remove lifter covers, scrape old gaskets off. Inspect for defects: bends, rips, flats, tears, etc. Get fresh gaskets -- neoprene not cork -- Fel-Pro or eqivalent. Put fresh gaskets on w/RTV on the tin side. When RTV is dry, replace on block and tighten [3+3] bolts. Do not overtighten. Check for leaks.

GRX · 07-30-2015, 06:11 PM

^^ that. Also ... lay the covers on a flat surface and look for deformities. Be sure the raised cross at the bolt holes is not pulled inward too far otherwise you will not get good even clamping pressure once installed.

Or ... you could spend $75 or so for a pair of cast aluminum covers. Much more rigid and less likely to leak than stamped sheet metal units.

68panelman · 07-30-2015, 07:32 PM

No leaks with "high tack" spray on cork gaskets for 25 yrs.

68panelman · 07-30-2015, 07:36 PM

And no RTV goop to boot

**special-K** · 07-30-2015, 08:00 PM

What have you tried? It's a simple removal, clean, and re-gasket job. Check plates for straight and that's about it.

68panelman · 07-30-2015, 08:03 PM

Exactly ^^^, must be damaged covers

**'68OrangeSunshine** · 07-30-2015, 08:48 PM

Quote:

Originally Posted by 68panelman

And no RTV goop to boot

You don't like RTV? There's a color RTV that's oil proof. Red, Blue or Black. Can't remember which one it is. Some people use RTV instead of a gasket, but I wouldn't use it alone.

68panelman · 07-30-2015, 09:02 PM

There's no need for RTV gasket, when using a cork askets a simple spray of high tack put on clean surfaces and you're done.

68panelman · 07-30-2015, 09:05 PM

The only one I'll use is the copper for high heat

GRX · 07-30-2015, 09:26 PM

RTV to fill gaps from a warped cover. Not necessary for two perfectly flat mating surfaces obviously.

**special-K** · 07-30-2015, 10:02 PM

I use the copper also. It will do what other high tack will do and not vice versa. I do use RTV when called for, which is usually a damaged or rough surface or lack of gasket fix.

Longhornss · 07-30-2015, 11:14 PM

Ok I am feeling like I am missing something simple..... Have replaced gaskets. Originally with cork and then a neoprene type.
Checked for flat flanges and the over extended bolt holes.
Have used high tack, and permatex aircraft gasket sealer. Have even tried doubling the gaskets up.
No I have not used RTV that was my last resort.
Thanks guys for your suggestions I will check what I have been doing Aron and start again.
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Shaky · 07-31-2015, 05:09 AM

Do I remember an o-ring or some little gasket under the bolt heads too? I doubt you're leaking from the bolts though.

Inspect the block surfaces. If I remember right, they are cast. Look for some obvious peak or valley in the cast iron.

RichardJ · 07-31-2015, 11:30 AM

I'm not sure what the original seal looked like, but I put these bonded washers under the bolt head.

**'68OrangeSunshine** · 07-31-2015, 03:57 PM

IIRC the OEM O-rings had right angle sides, rather than the circular profile of a normal O-ring. Just a flat rubber washer.
RichardJ's bonded steel washers would be a perfect upgrade.

Longhornss · 07-31-2015, 09:16 PM

Hey thanks guys I will try again I have another set of side covers I will team and dbl check against my current covers.
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**special-K** · 07-31-2015, 09:29 PM

Let us know how it turns out

Clavo106 · 07-31-2015, 10:12 PM

SO FAR EVER ONES ADVICE SEEMs GOOD. for RTV I use the Right Stuff in a couck gun. u cant get more better sealant then that. as far as leaks I doubt but mybe a lot of blowby. or check if it leaking on the a aftermarket breather.pvc.

Clavo106 · 07-31-2015, 10:14 PM

Forgot to add throw baby powder and see where is runs off to.

Longhornss · 08-01-2015, 06:29 AM

Quote:

Originally Posted by Clavo106

SO FAR EVER ONES ADVICE SEEMs GOOD. for RTV I use the Right Stuff in a couck gun. u cant get more better sealant then that. as far as leaks I doubt but mybe a lot of blowby. or check if it leaking on the a aftermarket breather.pvc.

The leak is contained to the side covers for sure. No problems with the PCV/breather.

I think I will get a new can of alpine green and shoot the extra set of covers ve have and try these with some new gaskets.....

mk3barti · 08-01-2015, 11:45 AM

If you are using RTV make sure you give it time to set up. When I did my covers I attached the gaskets to the covers, let it set up, then put them on the truck, let them set up, tightened, then drove. Took over a day to let everything dry but I have no leaks. I failed to do this on my valve cover gasket and it leaked right away.

Squareforceone · 08-05-2015, 09:29 PM

ttttt

07-30-2015, 12:33 PM	#1
Longhornss Registered User Join Date: Mar 2015 Location: Windsor,Ontario Canada Posts: 255	292 side cover Leak Hello all does anyone have a good fix for stopping the side covers from leaking on a 292? Posted via Mobile Device

07-30-2015, 02:52 PM	#2
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,170	Re: 292 side cover Leak Clean the block w/ degreaser and a high power spray so you can see if you still have a new leak. Remove lifter covers, scrape old gaskets off. Inspect for defects: bends, rips, flats, tears, etc. Get fresh gaskets -- neoprene not cork -- Fel-Pro or eqivalent. Put fresh gaskets on w/RTV on the tin side. When RTV is dry, replace on block and tighten [3+3] bolts. Do not overtighten. Check for leaks. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

07-30-2015, 06:11 PM	#3
GRX Registered User Join Date: Jul 2010 Location: MD Posts: 1,937	Re: 292 side cover Leak ^^ that. Also ... lay the covers on a flat surface and look for deformities. Be sure the raised cross at the bolt holes is not pulled inward too far otherwise you will not get good even clamping pressure once installed. Or ... you could spend $75 or so for a pair of cast aluminum covers. Much more rigid and less likely to leak than stamped sheet metal units.

07-30-2015, 07:32 PM	#4
68panelman Registered User Join Date: Jan 2011 Location: Delaware and Long Island, New York Posts: 3,455	Re: 292 side cover Leak No leaks with "high tack" spray on cork gaskets for 25 yrs.

07-30-2015, 07:36 PM	#5
68panelman Registered User Join Date: Jan 2011 Location: Delaware and Long Island, New York Posts: 3,455	Re: 292 side cover Leak And no RTV goop to boot

07-30-2015, 08:00 PM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: 292 side cover Leak What have you tried? It's a simple removal, clean, and re-gasket job. Check plates for straight and that's about it. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

07-30-2015, 08:03 PM	#7
68panelman Registered User Join Date: Jan 2011 Location: Delaware and Long Island, New York Posts: 3,455	Re: 292 side cover Leak Exactly ^^^, must be damaged covers

07-30-2015, 09:02 PM	#9
68panelman Registered User Join Date: Jan 2011 Location: Delaware and Long Island, New York Posts: 3,455	Re: 292 side cover Leak There's no need for RTV gasket, when using a cork askets a simple spray of high tack put on clean surfaces and you're done.

07-30-2015, 09:05 PM	#10
68panelman Registered User Join Date: Jan 2011 Location: Delaware and Long Island, New York Posts: 3,455	Re: 292 side cover Leak The only one I'll use is the copper for high heat

07-30-2015, 09:26 PM	#11
GRX Registered User Join Date: Jul 2010 Location: MD Posts: 1,937	Re: 292 side cover Leak RTV to fill gaps from a warped cover. Not necessary for two perfectly flat mating surfaces obviously.

07-30-2015, 10:02 PM	#12
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: 292 side cover Leak I use the copper also. It will do what other high tack will do and not vice versa. I do use RTV when called for, which is usually a damaged or rough surface or lack of gasket fix. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

07-30-2015, 11:14 PM	#13
Longhornss Registered User Join Date: Mar 2015 Location: Windsor,Ontario Canada Posts: 255	Re: 292 side cover Leak Ok I am feeling like I am missing something simple..... Have replaced gaskets. Originally with cork and then a neoprene type. Checked for flat flanges and the over extended bolt holes. Have used high tack, and permatex aircraft gasket sealer. Have even tried doubling the gaskets up. No I have not used RTV that was my last resort. Thanks guys for your suggestions I will check what I have been doing Aron and start again. Posted via Mobile Device

07-31-2015, 05:09 AM	#14
Shaky Six in a row makes it go... Join Date: Mar 2009 Location: Vacationland: Maine Posts: 1,346	Re: 292 side cover Leak Do I remember an o-ring or some little gasket under the bolt heads too? I doubt you're leaking from the bolts though. Inspect the block surfaces. If I remember right, they are cast. Look for some obvious peak or valley in the cast iron. __________________ 67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce

07-31-2015, 11:30 AM	#15
RichardJ Registered User Join Date: Apr 2010 Location: So Cal Posts: 1,420	Re: 292 side cover Leak I'm not sure what the original seal looked like, but I put these bonded washers under the bolt head. __________________ '67 GMC 2500, 292, 4spd, AC

07-31-2015, 03:57 PM	#16
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,170	Re: 292 side cover Leak IIRC the OEM O-rings had right angle sides, rather than the circular profile of a normal O-ring. Just a flat rubber washer. RichardJ's bonded steel washers would be a perfect upgrade. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.



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07-31-2015, 09:16 PM	#17
Longhornss Registered User Join Date: Mar 2015 Location: Windsor,Ontario Canada Posts: 255	Re: 292 side cover Leak Hey thanks guys I will try again I have another set of side covers I will team and dbl check against my current covers. Posted via Mobile Device

07-31-2015, 09:29 PM	#18
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: 292 side cover Leak Let us know how it turns out __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

07-31-2015, 10:12 PM	#19
Clavo106 Registered User Join Date: Apr 2015 Location: Yakima, WA Posts: 362	Re: 292 side cover Leak SO FAR EVER ONES ADVICE SEEMs GOOD. for RTV I use the Right Stuff in a couck gun. u cant get more better sealant then that. as far as leaks I doubt but mybe a lot of blowby. or check if it leaking on the a aftermarket breather.pvc.

07-31-2015, 10:14 PM	#20
Clavo106 Registered User Join Date: Apr 2015 Location: Yakima, WA Posts: 362	Re: 292 side cover Leak Forgot to add throw baby powder and see where is runs off to.

08-01-2015, 11:45 AM	#22
mk3barti Registered User Join Date: May 2015 Location: Saskatoon Posts: 84	Re: 292 side cover Leak If you are using RTV make sure you give it time to set up. When I did my covers I attached the gaskets to the covers, let it set up, then put them on the truck, let them set up, tightened, then drove. Took over a day to let everything dry but I have no leaks. I failed to do this on my valve cover gasket and it leaked right away.

08-05-2015, 09:29 PM	#23
Squareforceone Registered User Join Date: Nov 2010 Location: Rustville USA or southeast Ia Posts: 654	Re: 292 side cover Leak ttttt __________________ Rust is better than rice.

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