Re: Leak proof valve cover gaskets
[Re: fastmark]
#2464433
03/10/18 07:40 PM
03/10/18 07:40 PM
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Joined: Jan 2003
Posts: 4,711 Moved to N.E. Tennessee
GomangoCuda
master
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master
Joined: Jan 2003
Posts: 4,711
Moved to N.E. Tennessee
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Have you tried Mr Gasket ultraseals? Check with Superformance to see if they make a gasket suitable for stock covers.
Last edited by GomangoCuda; 03/10/18 08:02 PM.
In theory, there is no difference between theory and practice. In practice, there is.
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Re: Leak proof valve cover gaskets
[Re: topside]
#2464510
03/10/18 11:51 PM
03/10/18 11:51 PM
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Joined: Jan 2003
Posts: 5,443 Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,443
Indiana
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I love my stock 340 valve covers but I have been fighting leaks for many years. I have used several different types of gaskets and sealants. I have also done the normal crack repair and straightening but those attempts did not stop all of the leaks. So I decided to add an aluminum spacer under the valve covers and two sets of the blue streak cork gaskets torqued to the stock 55in/lbs. So far the flat surface of the spacers seems to have helped the leaks even with cork gaskets.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Leak proof valve cover gaskets
[Re: Dave Hall]
#2464630
03/11/18 10:16 AM
03/11/18 10:16 AM
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Joined: Jan 2003
Posts: 6,388 Abilene, Texas
fastmark
OP
master
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OP
master
Joined: Jan 2003
Posts: 6,388
Abilene, Texas
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Get some cast valve covers. If you must have the originals on iron heads, the best way is to smooth the rail on the head and glue the gasket to the cover using (sparingly) The Right Stuff. The cast rail on original heads is terrible. Narrow and filled with porosity. You have a 3/8 flange on the valve cover that tightens down to a 1/8"-3/16" rail. Over tightening can be a bad issue. The factory had those little boomerang and other pieces over the top of the valve cover rail for a reason. This is a restored, matching numbers, 440 4 speed Challenger. Can’t put cast covers on it.
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Re: Leak proof valve cover gaskets
[Re: fastmark]
#2464697
03/11/18 01:05 PM
03/11/18 01:05 PM
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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
master
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master
Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
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The best I ever used for stock covers was the Felpro performance gaskets. Black rubberized. They seemed to work best on the stock cast head surface, but in time, they will still leak.
[image][/image]
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Re: Leak proof valve cover gaskets
[Re: fastmark]
#2464763
03/11/18 02:52 PM
03/11/18 02:52 PM
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Joined: Jan 2003
Posts: 30,994 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 30,994
Oregon
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Get some cast valve covers. If you must have the originals on iron heads, the best way is to smooth the rail on the head and glue the gasket to the cover using (sparingly) The Right Stuff. The cast rail on original heads is terrible. Narrow and filled with porosity. You have a 3/8 flange on the valve cover that tightens down to a 1/8"-3/16" rail. Over tightening can be a bad issue. The factory had those little boomerang and other pieces over the top of the valve cover rail for a reason. This is a restored, matching numbers, 440 4 speed Challenger. Can’t put cast covers on it. Well now you have oil leaks just like the original cars did. That makes it a correct matching number car. It probably also leaks from the transmission and the differential just like the factory cars did.
Last edited by AndyF; 03/11/18 02:53 PM.
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Re: Leak proof valve cover gaskets
[Re: fastmark]
#2464766
03/11/18 03:03 PM
03/11/18 03:03 PM
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Joined: Jan 2003
Posts: 17,918 Akron, Ohio
ProSport
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,918
Akron, Ohio
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I switched to cast valve covers years ago, use a crush proof gasket like Superformance. Never any leaks at all.
1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
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Re: Leak proof valve cover gaskets
[Re: ProSport]
#2464805
03/11/18 04:18 PM
03/11/18 04:18 PM
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Joined: Apr 2012
Posts: 18,880 -
RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
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I switched to cast valve covers years ago, use a crush proof gasket like Superformance. Never any leaks at all. Me, too... Using the old 'high-temp' VC gaskets... Bone dry for a LONG time... Unless I had a need for OEM correctness, I'd never go back to stamped...
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Re: Leak proof valve cover gaskets
[Re: A39Coronet]
#2464893
03/11/18 08:10 PM
03/11/18 08:10 PM
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Joined: Aug 2003
Posts: 1,574
KOS
pro stock
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pro stock
Joined: Aug 2003
Posts: 1,574
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Blue Moroso Perm-align gaskets. Rubber with steel inner skeleton. Best I've ever used, no leaks, reuseable. I'll never run anything else. this or SCE but I'm not sure if they make em for factory style VCs I have them on my B1s and they are leak proof.
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Re: Leak proof valve cover gaskets
[Re: fastmark]
#2464989
03/11/18 11:14 PM
03/11/18 11:14 PM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
super stock
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super stock
Joined: Sep 2015
Posts: 1,096
Australia
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One thing that caught me was I was using an old set of M/T covers on Indy heads, the underside of the cover where a bolt passes though was a different angle !! You think it tight but it isn't.
1963 Plymouth Max Wedge 1971 Barracuda
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Re: Leak proof valve cover gaskets
[Re: fastmark]
#2465003
03/11/18 11:31 PM
03/11/18 11:31 PM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
super stock
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super stock
Joined: Sep 2015
Posts: 1,096
Australia
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YES , silicone the rubbers to the covers, let them dry and put them on and take them off for years.
1963 Plymouth Max Wedge 1971 Barracuda
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Re: Leak proof valve cover gaskets
[Re: fastmark]
#2465007
03/11/18 11:40 PM
03/11/18 11:40 PM
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Joined: Feb 2003
Posts: 1,098 Massillon, Ohio
cudatom
super stock
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super stock
Joined: Feb 2003
Posts: 1,098
Massillon, Ohio
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Have never had a leak w/superperformance or moroso blue. I have had the moroso blues on my wagon for 5 yrs. In that time the gaskets have been removed w/the VC several times for routine lash checks.
Ok
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Re: Leak proof valve cover gaskets
[Re: Thumperdart]
#2465125
03/12/18 10:56 AM
03/12/18 10:56 AM
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Joined: Jan 2003
Posts: 6,388 Abilene, Texas
fastmark
OP
master
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OP
master
Joined: Jan 2003
Posts: 6,388
Abilene, Texas
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You are officially the biggest ass hat on Moparts........... Who are we referring too as the ass hat? We only have the one leak on this car, the back of the valve covers. Thanks for the ideas guys. I’ll order one of the suggested gaskets and see how it works.
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Re: Leak proof valve cover gaskets
[Re: A39Coronet]
#2465175
03/12/18 12:55 PM
03/12/18 12:55 PM
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Joined: Jul 2005
Posts: 1,954 Blairsden, CA
Triggerfish
top fuel
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top fuel
Joined: Jul 2005
Posts: 1,954
Blairsden, CA
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Blue Moroso Perm-align gaskets. Rubber with steel inner skeleton. Best I've ever used, no leaks, reuseable. I'll never run anything else. X2
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Re: Leak proof valve cover gaskets
[Re: fastmark]
#2465217
03/12/18 02:37 PM
03/12/18 02:37 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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You are officially the biggest ass hat on Moparts........... Who are we referring too as the ass hat? We only have the one leak on this car, the back of the valve covers. Thanks for the ideas guys. I’ll order one of the suggested gaskets and see how it works. Not you bro Mr Andy F...........
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: Leak proof valve cover gaskets
[Re: fastmark]
#2466285
03/14/18 11:34 AM
03/14/18 11:34 AM
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Joined: Jan 2003
Posts: 8,021 Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,021
Tulsa OK
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I like these from Fel-Pro. My intake doesn't sit flush with the valve cover rail and these are thick enough to deal with that interference. I have even had good luck using them over and over after valve lash checking etc. https://www.summitracing.com/parts/fel-1...ASABEgKGbPD_BwEI would imagine they make a similar one for a big block as well.
Last edited by Bad340fish; 03/14/18 12:00 PM.
68 Barracuda Formula S 340
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Re: Leak proof valve cover gaskets
[Re: fastmark]
#2466450
03/14/18 04:11 PM
03/14/18 04:11 PM
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Joined: Jan 2010
Posts: 1,442 NW Chicago suburban area
Mopar Mitch
pro stock
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pro stock
Joined: Jan 2010
Posts: 1,442
NW Chicago suburban area
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All -- there is no gasket better than its installation! Regardless of material:
1. Make certain mating surfaces are straight and flat; stamped steel tends to become distorted, so, re-flatten or replace. Cast aluminum tends to remain flatter and is preferred when that option exits.
2. Check the cyl head gasket surface -- some casting flash may exist and needs to be smoothed flat.
3. Clean the threadings -- eliminate friction of dirt (nuts, bolts, studs, etc).
4. Follow proper torque specs -- do NOT over-tighten!
5. Do NOT use RTV silicone on the gaskets as it only acts as a lubricant to allow the gasket top slip out of position! IF nthe gasket has installation tabs that can fit into the cover, that is what holds and positions the gasket to the cover. If no tabs, a quick-drying contact cement can be used (NOT RTV).
6. The gasket does the sealing, not any chemical.
There are hi-temp options of material to resist the extreme heat of the hi-rise exhaust manifolds... see the Fel-Pro catalog.
I worked as an aftermarket engineer with Fel-Pro for nearly 30 years and I know all the stories and issues. Read the directions -- I wrote them.
Mopar Mitch
"Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers!
Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!
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