Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

Another PCV System Question

Old Mar 30, 2009 | 06:57 PM
  #1  
dan2286's Avatar
Thread Starter
|
Senior Member
Joined: Mar 2009
Posts: 157
Likes: 0
From: North Ridgeville, Ohio
Default Another PCV System Question

I have a 94 850 N/A that I just bought. The previous owner told me that the PCV system needed replaced, so instead of doing it the right way, he made some kind of bypass From what info I have gathered here, when that system gets clogged up, the dipstick tube and oil fill will have oil blowing up through it. Mine still does it. Shouldn't the "bypass" keep that from happening, or am I thinking wrong?? I still plan on replacing everything and making it correct, but does anyone have an idea on what this guy was trying to accomplish? If you want some pics to show what he did, let me know and I will get some. The oil leaks on this car are getting crazy and want to know if this has something to do with it.
 
Reply
Old Mar 30, 2009 | 07:33 PM
  #2  
JimKW's Avatar
Super Moderator
Joined: Mar 2005
Posts: 3,569
Likes: 2
From: Columbus, OH
Default

Basically you are still building up pressure inside the engine from clogged pcv. And that pressure is causing oil leaks. Eventually it could blow out the rear main seal if it hasn't already. Obviously his "BYPASS" is not working.
 
Reply
Old Mar 30, 2009 | 07:55 PM
  #3  
nonsense619's Avatar
Senior Member
Joined: Dec 2008
Posts: 255
Likes: 1
From: Bay Area,Cali-San Diego native
Default

even if he bypassed..a hose or the oil trap(whatever or where ever he did it) could have been already clogged with blowby.if its leaking badly you could have already blown the rear main seal.depending where the leak is coming from
 
Reply
Old Mar 30, 2009 | 10:11 PM
  #4  
dan2286's Avatar
Thread Starter
|
Senior Member
Joined: Mar 2009
Posts: 157
Likes: 0
From: North Ridgeville, Ohio
Default

I need to get a better look to see where it is coming from. Is there a good chance that it could have blown out any easier to replace seals/gaskets? If it is the rear main seal, could that eventually help wipe out the clutch with oil getting on it? Also, does the trans have to come out to replace the seal?
 
Reply
Old Mar 31, 2009 | 02:16 PM
  #5  
dan2286's Avatar
Thread Starter
|
Senior Member
Joined: Mar 2009
Posts: 157
Likes: 0
From: North Ridgeville, Ohio
Default

I am almost positive its the rear main seal. Hopefully by changing the system out, the leak at least gets a little better. If not, I will just try some high mileage oil and see if that helps.
 
Reply
Old Mar 31, 2009 | 07:36 PM
  #6  
Johnny Mullet's Avatar
Senior Member
Joined: Apr 2007
Posts: 431
Likes: 2
From: Ohio
Default

Check the cam seals. One behind the dizzy and one behind the cam sensor. Easy to change and commonly blow out if the vent system was clogged up.
 
Reply
Old Mar 31, 2009 | 08:40 PM
  #7  
nonsense619's Avatar
Senior Member
Joined: Dec 2008
Posts: 255
Likes: 1
From: Bay Area,Cali-San Diego native
Default

yes the trans needs to be dropped.
 
Reply
Old Apr 4, 2009 | 11:11 PM
  #8  
dan2286's Avatar
Thread Starter
|
Senior Member
Joined: Mar 2009
Posts: 157
Likes: 0
From: North Ridgeville, Ohio
Default

I dont know what the previous owner did, but there is some stuff I noticed wrong when changing this stuff. I am not sure if this is the name, but there is a piece missing inside the flame trap. It is the piece with a bunch of tiny holes going through it. I also think it was missing a little line going from the flame trap to what I think is supposed to go to the oil trap. Also, there is a vacuum line line with a screw stuffed in it. I will be getting a pic of that to see if anyone knows where it is supposed to go. So far, this car does not seem to be ghetto rigged too much.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
xjflexer
Volvo 850
1
Jun 16, 2012 11:43 AM
RMETJ
Volvo S70
3
Feb 23, 2012 10:38 PM
ibified
Volvo 850
10
Jun 14, 2010 12:12 PM
Saleen9090
Volvo 850
11
Apr 26, 2009 10:17 PM


Thread Tools
Search this Thread

All times are GMT -5. The time now is 12:09 PM.