Hi!
Long story short. Im trying to help a friend out.
His FD suddenly started building airpressure in the oilpan, venting out the oil filler cap.
'This happened shortly before he was to install his new BNRs...
Suddenly, a wild girlfriend appears, they have two back to back babies, on top of her two from previous relationship. They are happy and all, but this man got cut off SO abruptly from his passion.... and has been cut off ever since.
He has a good job, and has managed to save up about 20K USD on the side, and now he is longing for getting his FD on the road again...

He got to check the valve from intake to filler neck, but that was about it before family life hit him hard..!
Little norway has very few FDs, so we try to stick up for eachother, and me and a friend is planning to drop by his place in not to very distant future and help him with checking for faults, pulling engine and getting started on the work he has in front of him.

WHAT...can cause buildup of pressure in the oil pan? Please, poor your brains out here so we have a to-do list and dont miss anything.

Also, he is aiming for a BNR seq build, with autronic EMS in the bottom.

What would you do if you had 20K and wanted to build a rock solid BNR seq?

Thanks for your help on picking up a fellow rotard in need of a small push and alittle help

 

Excessive pressure could be an indicator of motor/turbo problems, but otherwise I would suggest making sure it's vented properly—either to the UIM and primary turbo inlet like OEM, or to a vented catch can.

 

What happens if he opens the filler neck port to atmosphere?

 

Then you're taking a short cut to what would otherwise be a properly vented catch can setup.

You're going to want to look into getting the IRP stainless oil filler neck and run a nice fat hose from one of the bungs into a vented catch can. This will also ensure that you don't get oil condensate all over your engine from gaseous hydrocarbons being blown out of the neck. The catch can will hold onto the condensate instead as well as vent all the pressure from the oil pan area.

 

^ There is no reason for a relatively stock car that is not tracked to need a catchcan. Arghx is not suggesting he drive around like that he wants to help diagnose the issue. Removing the cap and seeing what happens is a normal part of the troubleshooting process. Adding a fancy filler neck will not fix the problem of excessive blowby.

 

Okay then I misread the OP.

Is it possible that there is just too much oil in the car?

 

First, if the pressure build up on boost, you are probably have a bad or reverse PCV valve!

Second if you build pressure on idle you probably have a problem with compression seal like corner seal or sideseal or worst an iron!