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These valve covers WILL NOT seal
#1064349
08/28/11 01:10 PM
08/28/11 01:10 PM
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Joined: Jan 2003
Posts: 17,918
Akron, Ohio
ProSport
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 17,918
Akron, Ohio
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I need  , these fab aluminum valve covers with the long 1/4-20 bolts will not seal.  When I got the car I removed the covers to check valve lash. I installed new rubber coated fiber gaskets with no sealer and they leaked. So I bought another new set of gaskets and a tube of grey RTV(this stuff seals anything). And they still leak!!!!!!! These are iron heads, I'm not sure if the surfaces are flat or not. I've always ran valve cover studs with 440Source covers on my Dart with no sealers and no problems. Does anybody run these covers with good luck?
1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
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Re: These valve covers WILL NOT seal
[Re: fishy340]
#1064352
08/28/11 02:17 PM
08/28/11 02:17 PM
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Joined: Jan 2003
Posts: 17,918
Akron, Ohio
ProSport
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 17,918
Akron, Ohio
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I actually hate that kind of radiator hose, it will be coming off soon. I had one blow off and spray 190 degree antifreeze all over me a few years ago. I just can't belive that with good gaskets and grey RTV these things did not seal. I don't even have a clue what to try next. The Moroso gaskets that are rubber with a steel shim would probably work but if they don't it will be a waste of another $40. 
1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
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Re: These valve covers WILL NOT seal
[Re: ProSport]
#1064353
08/28/11 02:27 PM
08/28/11 02:27 PM
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Joined: Jan 2003
Posts: 21,072
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,072
Niles , Ohio
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Try a set of Mr Gasket ultras.Install dry and Ill bet they seal.We installed the famous for leak MP cast covers and no leaks at all even after taking them off to adjust valves.Rocky
Chrysler Firepower
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Re: These valve covers WILL NOT seal
[Re: stroked470]
#1064356
08/28/11 04:32 PM
08/28/11 04:32 PM
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Joined: Mar 2004
Posts: 1,371
Tallmadge, Ohio
Butch
pro stock
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pro stock
Joined: Mar 2004
Posts: 1,371
Tallmadge, Ohio
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Your problem is the RTV. It's ok to use RTV to hold the gasket to the VC. Be sure to let it dry over night. When you apply RTV to both surfaces(at least iron heads) with out curing it the gasket slips off of the surfaces when tightened. Silicone as you know very slippery. Just my  Butch
'74 Duster 440
'04 Hemi Quad Cab Ram
'06 Pacifica
'78 MGB
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Re: These valve covers WILL NOT seal
[Re: POS Dakota]
#1064359
08/28/11 09:51 PM
08/28/11 09:51 PM
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Joined: Jan 2007
Posts: 1,169
MI
68shifter
super stock
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super stock
Joined: Jan 2007
Posts: 1,169
MI
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These: http://chucker54.stores.yahoo.net/mopestcovaco.htmlI just put a set on my 440 with mp cast covers. Years of bs with cork, fiber, silicone. Put these on dry no leaks, and have pulled covers a couple times. I'll never buy anything else.
68' Barracuda (4 speed)
64' Savoy (4 speed)
65' Satellite (girl tranny)
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Re: These valve covers WILL NOT seal
[Re: 68shifter]
#1064360
08/28/11 10:53 PM
08/28/11 10:53 PM
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Joined: Jan 2003
Posts: 6,350
Aurora, Oh.
max_maniac
master
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master
Joined: Jan 2003
Posts: 6,350
Aurora, Oh.
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Quote:
These:
http://chucker54.stores.yahoo.net/mopestcovaco.html
I just put a set on my 440 with mp cast covers. Years of bs with cork, fiber, silicone. Put these on dry no leaks, and have pulled covers a couple times. I'll never buy anything else.
 That is what I use BUT I do have alum heads and block which I know are nice and even. I have taken them off and on several times and no issues and I only use 4 of the 6 screws to hold the valve covers on.
Russ
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Re: These valve covers WILL NOT seal
[Re: max_maniac]
#1064361
08/28/11 11:01 PM
08/28/11 11:01 PM
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Joined: Aug 2006
Posts: 687
Ohio
Chad Bittle
mopar
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mopar
Joined: Aug 2006
Posts: 687
Ohio
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Quote:
I only use 4 of the 6 screws to hold the valve covers on.
Russ
Now you're just bein' mean. 
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Re: These valve covers WILL NOT seal
[Re: max_maniac]
#1064362
08/28/11 11:07 PM
08/28/11 11:07 PM
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Joined: Jan 2003
Posts: 4,247
Newfoundland
codfish
master
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master
Joined: Jan 2003
Posts: 4,247
Newfoundland
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I use the cork gaskets, glued/RTVed to the valve covers. Let dry over night with weight on them. Then smear some grease on the gasket-to-head surface of the gasket and voila. NO leaks. And gasket can be re-used over and over again. Will not stick. And as mentioned above, make sure the bolts aren't too long. good luck codfish 
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Re: These valve covers WILL NOT seal
[Re: MR_P_BODY]
#1064364
08/29/11 07:03 AM
08/29/11 07:03 AM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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Iron bb heads valve cover rails are not flat. They are not supposed to be. The threaded holes are not square to the surface, they are tipped toward the intake side of the engine on purpous, as are the bosses they are drilled into. I'm very supprized you were able to get bolts in at all. If you put a straight edge on the thread bosses and compare that height to the front and the rear rails, you wil find about 1/8" difference. Those covers were meant for aftermarket heads. All of the aftermarket heads I know of have flat valve cover rails.
"use it 'till it breaks, replace as needed"
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Re: These valve covers WILL NOT seal
[Re: codfish]
#1064367
08/29/11 04:20 PM
08/29/11 04:20 PM
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Joined: Jul 2004
Posts: 4,384
Worst Weather USA
493_DART
master
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master
Joined: Jul 2004
Posts: 4,384
Worst Weather USA
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Quote:
I use the cork gaskets, glued/RTVed to the valve covers. Let dry over night with weight on them. Then smear some grease on the gasket-to-head surface of the gasket and voila. NO leaks. And gasket can be re-used over and over again. Will not stick.
And as mentioned above, make sure the bolts aren't too long.
good luck
codfish
This is the ONLY method that works for me as well.
I tried all the fancy gaskets even the $50 Moroso's .
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