Valve covers that don't leak - Team Camaro Tech
Engine General Engine Discussion.

 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old Dec 22nd, 00, 10:18 AM Thread Starter
cls
 
Join Date: Nov 2000
Posts: 18
Question

Who has the best small block valve covers from a no-leak perspective?
cls is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old Dec 22nd, 00, 10:49 AM
Senior Tech
Gene
 
Join Date: Nov 1999
Location: Dallas, Texas
Posts: 1,659
Post

I have never had a set of Chevy valve covers that didn't leak, even the late model center bolt covers. The late model covers leak at the hold down bolts, but not near as bad as the older style covers.

------------------
Pearl blue & white 69 Camaro with supercharged 350, Tremec TKO, and 3.73 12-bolt

See my website updated 12/17/00 at:

www.geocities.com/gheatly
gheatly is offline  
post #3 of 10 (permalink) Old Dec 22nd, 00, 11:22 AM
Senior Tech
 
Join Date: Dec 2000
Location: Beckley, WV
Posts: 106
Post

You can use stock old style valve covers that will not leak. The key is gaskets. Use a fel-pro cork gasket with a steel middle piece. Those things are tick. Moroso makes another good gasket. It is silicon with a steel core a little more expensive than the fel-pro, but lasts longer. If you are using stock rubber gaskets, use a bead of silicon in conjunction with the gasket, but dont tighten it up too much or the gasket will pop out because of the slick silicon.
also a support rail will greatly help seal the gasket better no matter what kind you use. I strongly suggest using those
racerboy3v is offline  
 
post #4 of 10 (permalink) Old Dec 22nd, 00, 02:51 PM
 
Join Date: Apr 2000
Posts: 21,341
Wink

Super glue, he, he!! No just kidding. Merry X-mas pdq67



pdq67 is offline  
post #5 of 10 (permalink) Old Dec 22nd, 00, 07:02 PM
Senior Tech
 
Join Date: Jan 2000
Location: Houston, TX USA
Posts: 797
Post

I have always had good luck with gluing/siliconing the gaskets directly to the lip of the valvecover. I start by thorougly cleaning and then degreasing the lip of the valve cover. Then I lightly sand the valve cover lip to give it some "bite". Then, glue the new gasket to the valve cover and make certain that it is positioned correctly and let it set up and dry completely (over night is good)before attempting to install them on the car. Before installation, grease the side of the gasket that contacts the head with axle grease. Not a lot of grease but just enough to keep the gasket from sticking should you have to remove it later. I have never had to replace gaskets that I have done this way and I have never had a leak with Chevy or after market covers. The real key is to NEVER over tighten the hold down bolts. ALWAYS use the load spreaders (where applicable). Try it, you just might LOVE it.

[This message has been edited by Go69 (edited 12-22-2000).]
Go69 is offline  
post #6 of 10 (permalink) Old Dec 23rd, 00, 03:15 PM
 
Join Date: Jan 2000
Posts: 230
Cool

Never had a pair I put on leak!

Use blue Permatex - gasket maker - clean cover real well - thin bead on cover - place gasket on - thin bead on gasket - place on head.

Works for me!!!

Steve
Dobek is offline  
post #7 of 10 (permalink) Old Dec 23rd, 00, 04:40 PM
Senior Tech
Bryan Shook
 
Join Date: Sep 1998
Location: Enola, Pennsylvania
Posts: 428
Post

Felpro makes a set, they cost about $50 and you put them on dry and can't overtorque them. I forget the name, Perma something. My father installed them on his '76 vette with no problems. I have a regular set of cork gaskets on my El Camino. Just put the yellow glue stuff on both sides and installed the covers. No leaks and a good seal.

------------------
Bryan Shook
Favorite Quote - Some people have shrinks. Some people have their garage.
My Father's 1968 RS 327!
My First Generation Camaro site
elcamino72 is offline  
post #8 of 10 (permalink) Old Dec 23rd, 00, 05:16 PM
Team Member
John
 
JohnZ's Avatar
 
Join Date: Sep 2000
Location: Washington, Michigan USA
Posts: 7,728
Post

Go69 has the drill down pat - I've always done exactly the same thing, have never leaked a drop from LOTS of SBC's. The leaks lots of guys get aren't from the gasket-to-head, they're from the gasket-to-valve cover joint. If you could see inside the valve cover with the engine running, you'd see oil POURING down the inside of the outer wall of the cover until it got to the inner edge of the gasket that sticks inboard from the corner of the cover where the flange is; the oil is trapped (like a dam) and builds up here, and tries to soak out through the joint between the top of the gasket and the bottom of the flange, and the excess runs over the inner edge of the gasket and runs down onto the head surface where it belongs. Getting a good seal between the top of the gasket and the flange on the cover will stop the leaks, as long as you don't over-tighten the valve cover bolts (which causes leaks between the bottom of the gasket and the sealing surface on the head). If you'll look at the later center-bolt covers (which were designed as part of Chevrolet's "Dry Engine" program), you'll note that the new design carries the inner wall of the cover down BELOW the level of the gasket, then turns back UP to the gasket area - this lets all that oil pouring down the inner wall of the cover run straight down, uninterrupted by any gasket edge, and off the bottom of the curve of the cover into the head area - the gasket never sees any direct flow of oil. Since the older covers don't have this feature, the name of the game is to seal the area that sees the direct oil flow, which is the gasket-to-cover joint.

------------------
JohnZ
'69 Z28 Fathom Green
JohnZ is offline  
post #9 of 10 (permalink) Old Dec 25th, 00, 09:32 AM
 
Join Date: Apr 2000
Posts: 21,341
Thumbs up

Didn't know all that, JohnZ!!!

Happy Holidays. pdq67



pdq67 is offline  
post #10 of 10 (permalink) Old Dec 27th, 00, 09:57 AM
Gold Lifetime Member
Jim
 
Join Date: Dec 1999
Location: Yorkville, Illinois USA
Posts: 22,121
Post

yes, what go69 said, exactly. Also, alluminum valve covers don't leak cause they don't bend, but, then they leak at the cheasy breather holes.... oh well



JimM is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome