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Re: These valve covers WILL NOT seal
[Re: TRENDZ]
#1064369
08/29/11 05:55 PM
08/29/11 05:55 PM
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Joined: Jan 2003
Posts: 75,005
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,005
U.S.S.A.
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Quote:
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.
THIS
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Re: These valve covers WILL NOT seal
[Re: SLOW67]
#1064371
08/29/11 07:42 PM
08/29/11 07:42 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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The covers are clearing the rockers and everything, and the bolts are all the correct length. I may have to sell these covers and get some that are designed more for iron stock heads. Last night I even bought the $38 Moroso's with the steel shim and the soft blue rubber and the passenger side still leaks.  The covers are not very flat but seem flat enough to work with a good gasket. Does anyone know the part number for the thick cork gaskets? I've already tried the thin ones glued to the valve cover with grease on the head and it leaked, then I tried tightening it more and it cut the gasket in half.  I've raced for 23 years and have never had something this small keep my car down for a week, unbelievable. Also, I need to find someone local with a belt sander to flatten these covers.
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Re: These valve covers WILL NOT seal
[Re: VernMotor]
#1064373
08/29/11 08:16 PM
08/29/11 08:16 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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Vern I would just sell yours and buy the 440source covers, they are only $119 fully polished and you can use studs and nuts instead of these long bolts that are eventually gonna strip out the holes in the heads. I hate these covers. They look nice though.
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]
#1064375
08/29/11 09:05 PM
08/29/11 09:05 PM
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Joined: Jan 2003
Posts: 8,165
Plymouth, MI
Blusmbl
master
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master
Joined: Jan 2003
Posts: 8,165
Plymouth, MI
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Quote:
Also, I need to find someone local with a belt sander to flatten these covers.
It's hard to make a non-level surface level just with a belt sander. If you have a flat surface available like a butcher's block or thick piece of glass, tape large pieces of sandpaper to it and use the surface to sand the valve cover rail area down. I've done this on water necks and other items, it works much better than the belt sander.
I'll also go against the grain and mention I've had much better luck with rubber gaskets vs. cork, but that could just be operator error on my end. 
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
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Re: These valve covers WILL NOT seal
[Re: fastcoronet]
#1064378
08/29/11 10:36 PM
08/29/11 10:36 PM
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Joined: Jan 2003
Posts: 17,918
Akron, Ohio
ProSport
OP
I Live Here
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OP
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Joined: Jan 2003
Posts: 17,918
Akron, Ohio
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Quote:
i have the same valve covers, and they would not seal no matter what i did. turn the valve cover over and put a straight edge on the rail where the welds were ground from the manufacture. you will see that the weld is still high and it is not letting the valve cover to seal along the center of the valve cover. I had to take a hand file and file the welds down to match the ends and the center of the valve cover. the center of the covers are a one piece formed alum. and the ends are another formed piece and where the two formed pieces were welded together along the rail is the problem. once i files this area they never leak again.
I noticed the same thing, I filed all the high spots and found 2 screws that were too long, thought for sure it was gonna seal this time but nope.
I might try to do some more filing tomorrow, I know it's not perfect.
By the way, who makes these covers and what do they cost?
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Re: These valve covers WILL NOT seal
[Re: ccarson]
#1064382
09/01/11 08:39 AM
09/01/11 08:39 AM
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Joined: Sep 2005
Posts: 769
Europa, Estonia
Georg
super stock
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super stock
Joined: Sep 2005
Posts: 769
Europa, Estonia
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trie once Cometic gaskets and forget those oil leaks
Outlaw Plymouth Valiant
R5/P7 Powered by Liuzzo Racing
COMP Performance Group dealer in Baltic
Premium Performance
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All the local auto stores around here try to push the rubber ones but I have always had problems with them....
