Re: Is there a secret to a leak free valve cover gasket?
[Re: Sixt8Chrgr]
#758641
07/27/10 05:54 PM
07/27/10 05:54 PM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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my 78 motor home 440 VC has a heat sheild tac welded to it I used the felpro thick black ones,kinda hard to get it to compress some though also used a thin coat of copper rtv on both side of gasket,put them on,torqued it down good,let cure over night no leaks yet,but have not run it very long so far its been 6 mounths and no leaks I also droped the log manny on the pass side for a center dump they are both very close to the vc edge,I hope the hold up for a while did the copper rtv on the sb truck also,never leaked so far in 4-5 yrs they been on there I use the copper rtv on the manny and head suface with no gasket,no leaks there either clean it all good with brake clean first and LET IT CURE OVERNIGHT
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Re: Is there a secret to a leak free valve cover gasket?
[Re: wh23g3g]
#758642
07/27/10 07:03 PM
07/27/10 07:03 PM
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Joined: Jul 2005
Posts: 712 California
BigDaddy440
super stock
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super stock
Joined: Jul 2005
Posts: 712
California
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In my opinion the problem is the newer valve covers on older cast heads. The cast heads (906 etc) have imperfections, and he newer valve covers are so ridged, they do not form to head at all.
I think most Edelbrock head owners will agree they don't have leaky valve covers.
I found that a good quality cork gasket worked better than rubber on a cast head. If you have a standard no maintenance camshaft / valve train, consider using a little RTV.
-dan
1969 A12 Roadrunner 1970 Plymouth Cuda 1968 Dodge Dart
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Re: Is there a secret to a leak free valve cover gasket?
[Re: BigDaddy440]
#758643
07/27/10 08:55 PM
07/27/10 08:55 PM
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Joined: Jun 2006
Posts: 824 NH
72challorange
He's Game
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He's Game
Joined: Jun 2006
Posts: 824
NH
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I use cork gaskets gorilla snotted to the valve cover. Do not over tighten. Tom Many miles no leaks been on and off at least a half dozen times.
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Re: Is there a secret to a leak free valve cover gasket?
[Re: demonH1B]
#758649
08/04/10 11:24 AM
08/04/10 11:24 AM
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Joined: Dec 2007
Posts: 387 n/w, PA
demonH1B
enthusiast
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enthusiast
Joined: Dec 2007
Posts: 387
n/w, PA
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Re: Is there a secret to a leak free valve cover gasket?
[Re: demonH1B]
#758650
08/04/10 12:32 PM
08/04/10 12:32 PM
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Joined: Aug 2006
Posts: 1,589 My Garage / Museum
idrivevintage
Chrysler Plant
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Chrysler Plant
Joined: Aug 2006
Posts: 1,589
My Garage / Museum
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Quote:
one more
Yes! Those are awesome, I got a set from a friend a few years ago and havent had problems yet. This is on a daily driven 66' Coronet with a 361 that I added 68' hp manifolds to. I was told that they were used on the police package cars.
Also if you cut the tabs off the gaskets that may help. They act as wicks for the heat to travel in and burn up your gaskets.
Good luck with those valve covers. They didn't seem to line up right for a friend but he eventually got them on. Just use a block of wood to straighten up your original covers and you'll be fine
Good luck with getting it sealed up
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Re: Is there a secret to a leak free valve cover gasket?
[Re: wh23g3g]
#758652
08/04/10 11:04 PM
08/04/10 11:04 PM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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like said a piece of wood 2x4 and a hammer will do wonders on the over torqued bolt holes and flange of vc light taps with a small hammer will straightn the puckerd holes back flat when done from the gasket side of the cover done many this way over the yrs to get them to seal when you install them wipe head and Vc down with brake clean to remove oil film,then air dry with airgun,then use the copper rtv thin coat on both side of the gasket,put on finger tight and then snug with a 1/4" hand drive after 20 mins let cure over night..works every time for me this way the sb has had no leaks since 07 when I worked them last time,they are 68 VC that i have had on 5-6 engines over the yrs the BB vc in the sig pic i reworked march last yr and no leaks,the center dumps are tight at the edge of VC also been milled for warpage,and are supper close thick black felpro gasket/copper rtv on them good luck with the alum VC
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