Search



Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine
Register Forgot Password?

Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by Weld Racing
Click Here

Welcome to ThirdGen.org!
Welcome to ThirdGen.org.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!


Reply
 
Thread Tools Search this Thread
Old 12-24-2000, 04:37 PM   #1
Member
 
Join Date: Jul 2000
Posts: 181

Classifieds Rating: (0)
Oil blowing out of breather...??

Puzzling problem. Put a new motor in my friends El Camino a month ago. Includes TrickFlow heads and running about 10.2:1 compression. Here's the problem; ever since the install, oil has been blowing out of the valve cover breather. We checked the PCV valve (new) and it is good, and is connected to the right port on the carb. The breather was an Erson chrome push-in style that was on the old motor. We installed a new Chevy chrome push-in breather. Same problem. We installed another PCV valve. Same problem.
Maybe we're overlooking something.
Any suggestions?
Thanks,
SC
super chevy is offline vBGarage Page   Reply With Quote
Old 12-24-2000, 06:17 PM   #2
Member
 
Join Date: Jun 2000
Location: Ohio
Posts: 129

Classifieds Rating: (0)
I have absolutely no idea what the problem is, but may have a way to fix it anyway. They make valve covers with baffles to keep the oil from splashing in there so much and to keep the rockers oiled better. If you can not figure out any other way to stop it, this may be a good idea. One draw back to these valve covers, however, it takes about 2-3 minutes to put in each quart of oil.

------------------
'86 IROC-Z
305 LG-4, T-5
T-Tops
50k Original Miles
K&N Air Filter
Stage I Chip
KYB Shocks/Struts
Centerforce Dual Friction
SGT SWEETPANTS is offline vBGarage Page   Reply With Quote
Old 12-24-2000, 06:20 PM   #3
Supreme Member
 
Join Date: Jul 1999
Location: out of my mind; be back in 5 minutes....
Posts: 1,590
Car: 1989 Firebird Formula
Engine: Internal Combustion
Transmission: Completed

Classifieds Rating: (0)

Send a message via ICQ to Petes 84Z28 Send a message via AIM to Petes 84Z28
My guess is a lot of blowby...if it was a fresh rebuild, it may take a while for the rings to seat themselves to the bore; or it could be the rings were incorrectly gapped (ie. too large a gap); or even the wrong oversize pistons: .030 over into an .040 over bore.

Pete

------------------
Pete's Place
HiOutput Virtual Racing Team
Petes 84Z28 is offline vBGarage Page   Reply With Quote
Old 12-24-2000, 06:51 PM   #4
ede
TGO Supporter
 
Join Date: Aug 1999
Location: Jackson County
Posts: 14,811

Classifieds Rating: (0)
Send a message via ICQ to ede
i was thinking rings installed up side down? if it's a new engine i would give the rings a chance to seat.

------------------
ICON Motorsports
1st & 3rd
ede is offline vBGarage Page   Reply With Quote
Old 12-24-2000, 06:54 PM   #5
Senior Member
 
Join Date: May 2000
Location: Woodbridge NJ
Posts: 571

Classifieds Rating: (0)
Send a message via AIM to CamaroZ_85
are you using synthetic oil for the break in? you need to use natural oil in order for everythin to seat properly...

------------------
350, Comp 262, Edelbrock Performer intake 600 cfm carb and exhaust, headers
-JVC, Eclipse, Pioneer, MTX, Phoenix Gold, Planet Audio
CamaroZ_85 is offline vBGarage Page   Reply With Quote
Old 12-24-2000, 07:22 PM   #6
Member
 
Join Date: Jul 2000
Posts: 181

Classifieds Rating: (0)
It's a new motor. Built and dyno'ed by a local speed shop. Has about 900 miles on it at this time. No synthetic oil. Is using what seems to be an abnormal amount of oil, but not blowing out the tailpipe. Runs VERY strong, just this breather problem.
SC
super chevy is offline vBGarage Page   Reply With Quote
Old 12-24-2000, 10:59 PM   #7
Senior Member
 
Join Date: Aug 1999
Location: Marysville OH
Posts: 443

Classifieds Rating: (1)
I had this problem with one of my motors. The cure for me was this. I had the pcv in the back of the valve cover going to a port on the rear of the carb. This motor didnt like it and puked oil also. I moved the pcv to the hole that the breather was in. It was in the front of the cover and it made sense that the blowby would come out the tallest part of the valve cover.This solved my problem. The breather is in the back and the pcv is in the front.

[This message has been edited by 87Z-ya (edited December 24, 2000).]
87Z-ya is offline vBGarage Page   Reply With Quote
Old 12-25-2000, 02:14 AM   #8
Senior Member
 
Join Date: Oct 2000
Posts: 2,264

Classifieds Rating: (0)
Send a message via AIM to Bort62
Pull out the Dipstick and Rev the engine, Do you see atomized Oil Blowing out ?

If So, You got some Massive Blowby.

if Not, Then you are prolly okay, Just get a Breather With a Foam insert In It to seperate the Oil Click the image to open in full size. My Buddys Nova is pusing 500Hp and it Blows the Breathers out On Occasion Click the image to open in full size.



------------------
60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Livin' the Stereotype
Bort62 is offline vBGarage Page   Reply With Quote
Old 12-25-2000, 08:52 AM   #9
Senior Member
 
Join Date: Nov 1999
Location: Elizabeth, Colorado
Posts: 1,507
Car: '94 Corvette
Engine: LT1
Transmission: 4L60E

Classifieds Rating: (0)
Had the same problem, solved by putting both beathers on the driver side.

No PCV...screw that emissions crap.

Ron C. Terry

------------------
'82 Trans Am
'81 Camaro Z-28
'94 Vette LT1 Coupe
ronterry is offline vBGarage Page   Reply With Quote
Old 12-25-2000, 02:58 PM   #10
Senior Member
 
Join Date: Nov 1999
Location: Omaha, NE
Posts: 803

Classifieds Rating: (0)

PCV's are not emissions crap! They take harmfull combustion gasses out of the crankcase before they contaminate the oil and raise it's acidity.

NOW TO SOLVE YOUR BLOWBY PROBLEM!
Do your valve covers have baffles in them were the breathers go? If the valve covers are cheap then they won't have baffles and oil will puke all over the valve cover. Get a GOOD set of valve covers with baffles and your problem should go away. If it does'nt then you have ENGINE TROUBLE.

------------------
84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!
CamaroMike is offline vBGarage Page   Reply With Quote
Old 12-25-2000, 02:58 PM
ThirdGen
1992 Camaro




Paid Advertisement


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine

Tags
400, 50, blow, blowing, breather, breathers, chevy, fresh, good, motor, oil, olds, pontiac, problems, sbc, super
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

 


1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 11:25 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.

Emails & Contact Details