Valve covers
The Best of Corvette for Corvette Enthusiasts


i found out my old valve cover seals were leaking by looking at my plugs using the reading guide on this site:
http://www.4secondsflat.com/Spark_plug_reading.html
frog.
You could always paint or detail them in between the fins if you wanted.
Here's mine (Scroll right down and you'll see what I did with detailing)
http://www.australiancorvettes.com/p...wtopic.php?t=3
i found out my old valve cover seals were leaking by looking at my plugs using the reading guide on this site:
http://www.4secondsflat.com/Spark_plug_reading.html
frog.
Whoa Whoa Whoa!!!!
Leaking valve stem seals can cause oil to drip down into the combustion chamber.
Leaking valve cover "seals" or actually the rectangular gasket can cause oil to leak onto the exterior of the head and onto exhaust pipes.
The shape/form/gasket of the valve cover has nothing to do with spark plugs. However, he is right that cheap and flimsy vc's MAY not seal right and leak oil. Just not into the combustion chamber of the head!
Last edited by USAsOnlyWay; Feb 15, 2006 at 04:54 AM.

Leaking valve stem seals can cause oil to< "(drip down)"-misquote see above> into the combustion chamber.
Leaking valve cover "seals" or actually the rectangular gasket can cause oil to leak onto the exterior of the head and onto exhaust pipes.
The shape/form/gasket of the valve cover has nothing to do with spark plugs. However, he is right that cheap and flimsy vc's MAY not seal right and leak oil. Just not into the combustion chamber of the head!

in my opinion, sucking air and oil into a cylinder is worse than the compressed cylinder pressure blowing oil through the valve covers onto the headers. an internal combustion engine is basically an air pump powered by the introduction of an explosive vapor. its job is sucking gasoline vapor through valves into the cylinders, compressing it, igniting said vapor, holding it for maximum power and expelling the combustion gases through valves. repetitive explosions drive the crankshaft in a constant direction which is transfered to the drivetrain.
the auto air pump operates best when air induction and expulsion are fully controlled by the camshaft. the engine mechanical and computer systems are designed to work best under ideal and predictable conditions. ergo: don't want no leaks. leaks are bad.
physics 101
i can remember when i was young and had a hard head.
if you don't believe me that air leaks on a compressed system make a difference, look at the website i listed above. it is the most comprehensive site i have ever seen on reading plugs. look at it, and you will see why i was so impressed and enlightened. at least, i hope you will.
froggy.
Last edited by parafrog; Feb 15, 2006 at 07:41 AM.
i can remember when i was young and had a hard head.
if you don't believe me that air leaks on a compressed system make a difference, look at the website i listed above. it is the most comprehensive site i have ever seen on reading plugs. look at it, and you will see why i was so impressed and enlightened. at least, i hope you will.
froggy.
Ummm, Long before there where PCV systems they had breathers (A big hole in the top of the VC with an air cleaner). Many people still use the breather system and with no problems of leaky valve seals. The PCV systems do a lot of good for the motor but that is because it provides a positive suction for the crank case ventilation system. Trust me on this one if you have a poorly sealed VC it will spew oil all over the motor long before you have any sort of combustion problems.
If this is the point in the article you are refering to it is probably refering to a ceter mount plug. In that case a leaky valve cover could fill the hol;e with oil and then leak oil into the CC. For a SBC this is not going to be a problem because you will be dumping oil onto the exhaust and fire will be of bigger concern
"leaking valve covers allowing oil to seep through the plug threads, whatever it needs to be fixed."
Last edited by FD2BLK; Feb 15, 2006 at 08:27 AM.
copying AGENT86 are you
Yeah those cheap valve covers are cheap because they're low grade and it won't be long-I'd rather paint mine. copying AGENT86 are you









Its always fun to play with a vette. Just waiting to unleash it on the road again


