pcv system

thehookeup · Post by **thehookeup** » Mon May 15, 2006 4:48 am

i am puting a new oil catch can on my car tomorrow. but my PCV system seems to be pushing out a lot more oil then its supposed too. is there a reason for this. the head change, couldnt change this could it?

napphappy · Post by **napphappy** » Mon May 15, 2006 4:42 pm

Where is the oil comming out?

thehookeup · Post by **thehookeup** » Mon May 15, 2006 5:55 pm

the pcv system is working just fine, it just seems to be flowing a lot more oil than its supposed to. i have no leaks, its just dumping a lot more oil into the intake than i think it should be

my3awds · Post by **my3awds** » Mon May 15, 2006 6:59 pm

Excessive blowby can be caused by worn piston rings I believe. If you have access to a leak down testor, that would tell you if your rings are going bad. If your car burns oil or has low compression on certain cylinders, that would also be an indication of bad rings.

I think restrictions in the PCV system also can cause blowby, causing excessive pressure build up.

thehookeup · Post by **thehookeup** » Mon May 15, 2006 7:22 pm

i just rebuilt the motor. brand new oem rings. i have

175
180
182
178
compression

entirelyturbo · Post by **entirelyturbo** » Tue May 16, 2006 12:38 am

I doubt it's the rings.

What kind of PCV valve are you using? If you're using an aftermarket one, it might be letting too much manifold vacuum through and literally sucking oil out of the crankcase. Always use an OEM PCV valve.

All_talk · Post by **All_talk** » Tue May 16, 2006 3:13 am

Poor ring seal is the number one reason for excessive blow by but a bad head gasket can do it to… Your compressing numbers likely rule out both.

You sure the oil is coming through the PCV system? Bad compressor seal maybe?

Gary

thehookeup · Post by **thehookeup** » Tue May 16, 2006 5:15 am

well i think i narrowed it down. i am not using the stock pcv valve. infact im not using it at all. i took it out and put a plug in. and ran it straight to the inlet on my turbo. i was gonna put a new catch can on it. but i never got to it. i am gonna do it tomorrow. i am obviously pulling more through it then it would through the valve. so.. it should be cured tomorrow. not to mention i havent been burning oil. which lol means i must have a little oil in the bottom of my intercooler. i just didnt figure i was gonna pull that much oil. cause i have only been running it for a few days. i just noticed a little coming out of my BLV. ill post when its fixed

legacycentral bbs

A forum for 89-94 BC-BF(BJ) Legacy Owners and Fans

pcv system

pcv system