oil coming out of breather - 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 11-18-2012, 10:55 AM
Pupsvette76's Avatar
Registered User
 

Last journal entry: no spark and fuel pump issue
Join Date: May 2009
Location: smithtown
Posts: 467
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
oil coming out of breather

hey guys need help here... ive been chasing an oil leak for the last 3 days that seemed like a simple fix at first but i can fix it ...i noticed a lot of oil dripping down the back of my engine passenger side of the bell housing down near the starter... i traced it back to the passenger side valve cover so i replaced the warped stamped steel covers with tall aluminum moroso covers and used molded rubber mr.gasket cover gaskets ...took the car back out and still noticed a lot of smoke under the hood... i noticed the breather on boths side but mostly the passenger side spitting oil all over... so i figured maybe the breather is cloogged so i got a breather that looks like a little cone air filter with a shroud.. and still theres oil everywhere...so i put a pcv valve on the pass side and still its blowing oil out of the breathers...the oil pressure is very high at WOT approx 95psi... and it s a turbosmall block chevy motor at this point i think the crankcase is getting pressurized by some blow by and forcing oil out of the breather ...anybody have a good fix for this or know whats really going on

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-18-2012, 10:59 AM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,430
Wiki Edits: 0

Thanks: 292
Thanked 709 Times in 684 Posts
do you have room for a vacuum pump? have you tried tall breather tubes as a quick fix and plum the gasses into the exhaust?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-18-2012, 11:05 AM
Pupsvette76's Avatar
Registered User
 

Last journal entry: no spark and fuel pump issue
Join Date: May 2009
Location: smithtown
Posts: 467
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
tall breather tubes? is that a item i can buy or do i need to make them
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-18-2012, 11:27 AM
sedanbob's Avatar
Registered User
 
Last photo:
Join Date: Oct 2008
Location: St. Louis
Age: 65
Posts: 625
Wiki Edits: 0

Thanks: 60
Thanked 80 Times in 77 Posts
Do your new rocker covers have baffles under the breathers?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-18-2012, 11:28 AM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,430
Wiki Edits: 0

Thanks: 292
Thanked 709 Times in 684 Posts
you can buy them. look at any circle track car. running a line into the collector helps evacuate the fumes
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 11-18-2012, 03:30 PM
farmwalker's Avatar
Registered User
 
Join Date: Aug 2012
Location: Kansas City, KS
Posts: 69
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by sedanbob View Post
Do your new rocker covers have baffles under the breathers?
Yes! Check for baffles. I had this problem and tried changing alot of things but never fixed it. I never found out that my old valve covers didn't have baffles under the breathers till I got new valve covers. lol. But then I realized why I could never fix that leak from the breather. Hope this helps!
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 11-21-2012, 04:11 PM
Pupsvette76's Avatar
Registered User
 

Last journal entry: no spark and fuel pump issue
Join Date: May 2009
Location: smithtown
Posts: 467
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
There are no baffles but I believe that there is a small leak near the corner of the cover ... Could it be due to high crankcase pressure? My oil pressure is high
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 11-24-2012, 08:34 PM
farmwalker's Avatar
Registered User
 
Join Date: Aug 2012
Location: Kansas City, KS
Posts: 69
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Because there are no baffels, most likely the oil is shooting up into the crank case breather and is then dripping out of the filter. That is what was happening to me.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 12-08-2012, 11:20 AM
Pupsvette76's Avatar
Registered User
 

Last journal entry: no spark and fuel pump issue
Join Date: May 2009
Location: smithtown
Posts: 467
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I've seen guys use vacuum pump to clear the crankcase they the breather ports on the valve covers but most of the time they are the very expensive mechanical pumps running off a pulley can an electric vacuum pump be setup to do the same thing
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 12-08-2012, 03:12 PM
Registered User
 
Join Date: Jun 2010
Location: TX
Posts: 1,156
Wiki Edits: 0

Thanks: 0
Thanked 101 Times in 93 Posts
Pontiac engineers have always had trouble with oil blowing out the valve cover oil fill/breathers. In 1964, Pontiac engineers installed oil dripper-baffles under the valve covers and that eliminated 90% of the oil blowing out the oil fill/breather cap problem on the passenger cars. On the high performance vehicles, Pontiac first tried placing 3" stacks on the valve covers that contained a baffle and mounted a push-on breather cap and those were used on the high performance 1962-63 389/421 SD/HO engine. That design was continued in 1964 on the 389 GTO engines. The 1962-1964 389/421 SD/HO and 1964 GTO high performance engines did not use dripper-baffles under the valve covers because those engines either had solid lifters that required lash setting occasionally and some customers wanted to "lash-out" the pre-load on the hydraulic lifters on Sunday for an extra 500 RPM and the dripper-baffles would make that too difficult. The drippers were retained until 1979 but did not include any type of baffle. Those drippers were spot welded to the roof of the valve covers.

Finally the closed system was introduced in 1968 and the valve cover oil fill/twist-in breathers were eliminated. In 1968, one valve cover received a rubber plug and the other valve cover had a PCV valve located where the oil fill/breather cap was formerly located. That was the completely "closed" crankcase vapor return system.
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
smoke coming out of breather and oil fill cap Pupsvette76 Engine 15 11-03-2010 01:39 PM
breather oil separator brian12c Engine 1 07-12-2008 11:14 AM
Vapor coming fro mthe breather and oil cap but not oil....????? 76 elco Engine 8 07-06-2007 04:35 PM
oil coming out valve breather? Brian Morency Engine 11 10-07-2004 03:50 PM
breather leaking oil RS496Stroker Engine 6 09-09-2002 05:43 PM


All times are GMT -6. The time now is 09:35 AM.


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.