valve cover leak... need healp - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 07-01-2007, 07:13 PM
Registered User
 
Last photo:
Join Date: Jun 2007
Location: brooklyn, NY
Posts: 15
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
valve cover leak... need healp

i had a leak from both of my valve covers so i changed the gaskets and they were still leaking (left side was a steady drip).. so i went out and bought a new set of valve covers and gaskets and the left side still has a small leak(only after i shut the engine off) any answers would be appreciated.
thanks mike... i put an arrow in the pic to show where the leak is comming from
Attached Thumbnails
Click image for larger version

Name:	engine.1.gif
Views:	117
Size:	192.0 KB
ID:	22466  

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-01-2007, 07:35 PM
Jmark's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Sep 2003
Location: phoenix
Age: 61
Posts: 4,786
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Hi Mike. Is it possible that the leak is from the breather dripping oil on the VC? Just a thought.

I had a real hard time getting my new covers to stop leaking. I ended up gluing the gaskets to the cover with 3M weather strip adhesive and let it set up a little. Then I used Permatex #2 on the head side. Just a small amount evenly smeared on the gasket. Buttoned it up and so far so good.

I know some use RTV but personally, from what I learned early on, its not for use with gaskets. It is soooo slick when wet that quite often it will let the gasket slide out and cause an even bigger mess. Also, on stock heads and silicone, the cover can actually push the gasket into the rounded surface and cut the gasket right down the middle. Not good. My 2 cents on that subject! LOL

Mark
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-01-2007, 07:47 PM
Registered User
 
Join Date: Jun 2007
Location: plano texas
Posts: 374
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
studs and fel-pro

I had the same problem. Get studs about $12. Most important get a reusable gasket with a steal insert. I recomend fel-pro (blue ones) they are about $40 summit has a store brand but did not work. I like the blue fel-pro. Put the studs in put the gasket on (no sealer) and you will be fixed. I went though 4 sets of gaskets ($45) before I used studs and Fel-pro steal insert gaskets. The studs are also key it will not let you over tighten. I know it sounds expensive but it will work no might involved "It will work".
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-01-2007, 07:53 PM
Registered User
 
Last photo:
Join Date: Jun 2007
Location: brooklyn, NY
Posts: 15
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks. but i know that its not comming from the breather (i eye-balled it and waited and wiped and watied lol) its leaking from the left side coner right at the rounded part of the heads
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-01-2007, 09:18 PM
Member
 
Last photo:
Join Date: Nov 2004
Location: Indiana
Age: 60
Posts: 393
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by tomthecomic
I had the same problem. Get studs about $12. Most important get a reusable gasket with a steal insert. I recomend fel-pro (blue ones) they are about $40 summit has a store brand but did not work. I like the blue fel-pro. Put the studs in put the gasket on (no sealer) and you will be fixed. I went though 4 sets of gaskets ($45) before I used studs and Fel-pro steal insert gaskets. The studs are also key it will not let you over tighten. I know it sounds expensive but it will work no might involved "It will work".

This will fix the problem. I went through 3 sets of gaskets. I even tried double gaskets and gaskets with rtv on them. They continued to leak. I bought the ones with the steel inserts and no more leaks. I have even removed one of them to replace a bad rocker stud and reused it. No leaks.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-01-2007, 09:36 PM
Member
 
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 64
Posts: 5,103
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
These can sometimes help: Mr. Gasket valve cover bolt load spreaders for SBC engines.


Part number--finish

6395--gold dichromate
6396--chrome
6397--black


Also, be sure your cover flanges are straight. Sometimes you have to beat on them some to make them straight enough to seal.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-01-2007, 09:40 PM
Registered User
 
Last photo:
Join Date: Jun 2007
Location: brooklyn, NY
Posts: 15
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
already using a gasket with a steel insert. its not a big leak anymore, but when i turn the car off after about 2mins u see it trickling down the block. AND i know this is off topic a little bit but what should the oil pressure be around...
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 07-01-2007, 10:01 PM
Registered User
 
Last photo:
Join Date: Jun 2007
Location: brooklyn, NY
Posts: 15
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
and another thing... any reason why it only leaks when the engine is off ???
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 07-01-2007, 10:52 PM
j.d.brown.042964's Avatar
406 Caprice:Rust Never Sleeps!
 
Join Date: Jun 2007
Location: St.Clair County,Alabama.
Age: 50
Posts: 278
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Just for extra "insurance"-the next time you have vc's off, be sure to check drain-back/return galleys on the head(s),
especially the ones at rear. Because the engine sits lower at the rear than the front, they usually get more business than the others. It's not uncommon to have a piece or chunk of one of the little cardboard or styrofoam cap seals (from a quart container of oil) get down into a return galley and partially obstruct return flow-causing oil to buildup to higher than normal level under the valvecover(s), and this in turn can contribute and/or exacerbate any leakage already being caused by poor sealing of the valvecover gaskets. Also-even though they are new- it really would be a good idea to check the flanges of the covers with a straightedge just to be sure. The "load spreaders" previously mentioned by another poster are an excellent idea as well. Good luck and let everyone know what ends up solving the problem.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 07-01-2007, 11:13 PM
DHMag's Avatar
Registered User
 
Last photo:
Join Date: Jun 2005
Location: InCahoots, Texas
Posts: 302
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
chrome/aftermarket valve covers are notorious for having larger flange lips than stock valve covers. this, in essence, causes the valve cover to contact the intake manifold before seating on the gasket, thus creating a leak. switch to thicker gaskets or change the valve covers.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 07-02-2007, 02:06 AM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Doc here,

It sounds to me like your rear oil return holes are plugged with "gunk"..pull the Covers, and "Fish" the returns with a coat hanger..OR better yet..A Gun Cleaning kit.

GET a NEW set of gaskets, SOAK them in OIL about 30 or more minutes before you install them. This will EXPAND the cork and give a better fit.

If you Don't have Spreader Bars, Get a Set of 8 and install them on the hold down handles.

This should stop your leaks..If not, your new covers are major bent..(common place problem) Return them and get a new set.

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 07-02-2007, 05:23 AM
Hippie's Avatar
Analog man in a digital world.
 

Last journal entry: HEI comparison.
Last photo:
Join Date: May 2003
Posts: 2,255
Wiki Edits: 0

Thanks: 3
Thanked 5 Times in 5 Posts
Quote:
Originally Posted by docvette
It sounds to me like your rear oil return holes are plugged with "gunk"..pull the Covers, and "Fish" the returns with a coat hanger..OR better yet..A Gun Cleaning kit.

If it leaks AFTER you shut it off then I'm with Doc, oil is pooling in the heads and the only way that can happen I know of is the return holes being plugged.

I'm using studs with Esna lock nuts, Mr. Gasket rubber gaskets with the metal insert and the spreader bars and have NO leaks and the gaskets were used ones that came with a set of valve covers I bought off eBay.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 07-02-2007, 11:46 AM
dawg's Avatar
NAVY VETERAN
 
Last photo:
Join Date: Aug 2004
Location: Colebrook Connecticut
Age: 55
Posts: 903
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
chrome valve covers are notorious for leaking.
also check your PCV to see if its not plugged cuz that will make the oil puke out of the breather.
my advice :
ditch the chrome and get some cheap diecast covers.
the ealing area holds up nice with em.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 07-02-2007, 04:00 PM
Registered User
 
Last photo:
Join Date: Jun 2007
Location: brooklyn, NY
Posts: 15
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks for all the replys.. tom im gonna try to clean out the return bc thats what i was thinking might be the prob (well the part about the build up not the return being clogged) as for the spreaders i allways had them on and i will check to see if the covers r bent.. might take the camera and show pics.. thanks again
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 07-02-2007, 06:08 PM
FEDDO's Avatar
Member
 
Join Date: Mar 2005
Location: middle ga
Posts: 369
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
ck the v/c rail on the head also. might have been dropped at some point in its life.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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 for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Valce cover Oil leak problem / PCV system question hotrodf1 Engine 7 05-01-2007 02:44 PM
Valve cover breathers Deralik Engine 27 10-28-2006 09:07 AM
Valve Cover Gasket Leak 18-FEVR Engine 9 01-01-2005 12:44 PM
Valve cover install? Jag Daddy Engine 5 05-12-2004 05:50 AM
Valve cover gaskets jeff germano Engine 9 10-08-2002 04:34 PM


All times are GMT -6. The time now is 03:26 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.