TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Sponsored by:
Sponsored by:

oil thru the PCV breather pipe...

Thread Tools
 
Search this Thread
 
Old Jul 14, 2003 | 03:00 AM
  #1  
cunawarit's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2002
Posts: 90
Likes: 0
From: Southampton, Hampshire, UK.
Car: 1990 IROC-Z daily driver
Engine: 305TPI
Transmission: Automatic
oil thru the PCV breather pipe...

Right my car is smoking like hell. I reckon there's oil comming thru the breather pipe because the intake seems really oily as does the breathe pipe.... There should be no oil there, right???

Second discouraging point. I live in the UK and fixing this car isn't as easy as it should be. My mechanic insists that if I take off the breather pipe and plug the hole left on the intake I'll blow an oil seal!!!!! I don't know how on earth he has worked that out!!!

I have just bought this car... I am SO incredibly dissapointed.

EDIT: I don't think it is the PCV valve... You can feel it clicking when the engine is on.

Last edited by cunawarit; Jul 14, 2003 at 03:03 AM.
Reply
Old Jul 14, 2003 | 06:58 AM
  #2  
smiley23's Avatar
Junior Member
 
Joined: Feb 2003
Posts: 82
Likes: 0
Just finished fixing that prob with my car too.

I changed the PCV on the DS of the car and the breather and filter on the PS of the engine. I also had to change the rubber seal on the dipstick and the rubber gromots that the PCV and breather fit into (for a better seal).

Just verify that the configuration of those vents are correct - if so - maybe a different oil. Defiantly do not plug the vents.
Reply
Old Jul 14, 2003 | 07:07 AM
  #3  
cunawarit's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2002
Posts: 90
Likes: 0
From: Southampton, Hampshire, UK.
Car: 1990 IROC-Z daily driver
Engine: 305TPI
Transmission: Automatic
Originally posted by smiley23
Defiantly do not plug the vents.
This wasn't a permanent solution. I just wanted to test if it would stop smoking, because then I can be sure it is deffinatelly oil thru the breather pipe.

Thanks for the help I'll see what the garage says, if they are totally unhelpful I'll do as you said.

BTW, how much was yours smoking? Was it also only during hard acceleration?
Reply
Old Jul 14, 2003 | 09:06 AM
  #4  
Fevre's Avatar
Member
 
Joined: Jan 2003
Posts: 404
Likes: 0
From: Hartland MI
Car: 89 Formula
Engine: 355
Transmission: 700r4
Axle/Gears: 3.73
Originally posted by smiley23
Just finished fixing that prob with my car too.

I changed the PCV on the DS of the car and the breather and filter on the PS of the engine. I also had to change the rubber seal on the dipstick and the rubber gromots that the PCV and breather fit into (for a better seal).

Just verify that the configuration of those vents are correct - if so - maybe a different oil. Definately do not plug the vents.
Changed some of my grommets too, they where like hard plastic giving no real seal. I removed the breather tube and put a moroso breather on in its place. Is your pcv at the right rating for your vac level? It might be rated higher than your cruising vac level causing it to shut allow pressure to build in your crank case.
Reply
Old Jul 14, 2003 | 12:40 PM
  #5  
smiley23's Avatar
Junior Member
 
Joined: Feb 2003
Posts: 82
Likes: 0
Originally posted by cunawarit
This wasn't a permanent solution. I just wanted to test if it would stop smoking, because then I can be sure it is deffinatelly oil thru the breather pipe.

Thanks for the help I'll see what the garage says, if they are totally unhelpful I'll do as you said.

BTW, how much was yours smoking? Was it also only during hard acceleration?
Yes, mine was only under hard acceleration. The last item I cleaned up was the dipstic tube - it threw me off at first since I didnt think that oil would come out of there.
Reply
Old Jul 14, 2003 | 04:37 PM
  #6  
cunawarit's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2002
Posts: 90
Likes: 0
From: Southampton, Hampshire, UK.
Car: 1990 IROC-Z daily driver
Engine: 305TPI
Transmission: Automatic
Originally posted by Fevre
Is your pcv at the right rating for your vac level?
I haven't a clue.

I have never seen the inside of a PCV valve, but I am guessing there is a spring in there somewhere. If the valve is quite old the spring might have lost some of its springiness and thus the valve may not be operating properly.

I have just bought this car, for all I know the PCV valve has been there for donkey’s years.
Reply
Old Jul 15, 2003 | 07:31 PM
  #7  
BOTTLEDZ28's Avatar
Supreme Member
iTrader: (9)
 
Joined: Sep 1999
Posts: 3,871
Likes: 24
From: Mass
Engine: 350 TPI
Transmission: A4
Axle/Gears: 3.23
I am having the same problem with my Z28. I have a serious case of blowby. my PCV valve has oil all over it and the grommonts on both valve covers are soaked in oil. Oil is even coming back up the dipstick tube. I have replaced my entire PCV system and it still remains. I have a new GM engine in my car. it is the 350 TBI long block from Jim Pace Warehouse. Should I be buying a PCV valve for that engine or for my year car and orginal engine. I always buy PCV valves from Autozone and I bet that isnt good huh?
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Pac J
Tech / General Engine
3
May 17, 2020 10:44 AM
jrdturbo
Firebirds for Sale
26
Mar 31, 2016 02:58 PM
NZKnight
Tech / General Engine
6
Oct 15, 2015 02:47 PM
skinny z
Engine/Drivetrain/Suspension Parts for Sale
5
Oct 5, 2015 06:23 PM




All times are GMT -5. The time now is 12:18 PM.