Oil leaks/ crankcase pressure problems HELP

[untouchablecc]

I have been having a problem with leaking oil from boosting or excess pressure in the crankcase. I have done the research and i cant pin point my issue.

Every time i get into boost i have oil covering the driver side of the inside of my hood and it leaks out onto the front bumper. I also have oil in my valve cover.
Now i have replace my oil dipstick brand new from extreme psi and its also a 1g stick. I have a spring holding down my oil dipstick and it never pops out. I tried switching valve covers and still does the same thing. PCV valve is prob six months old and sounds good and the line for that is ran to my intake like stock which is also not clogged. I have the breather line on the side of my valve cover running to a oil catch can.

I just recently switched from a knock off 16g to a h1c and i cant boost this thing without sitting at a light an oil rolling out from under my hood. If i drive normal i have no smoke. I have no idea where the oil is coming from and its really starting to get annoying because i try to keep my stuff clean an up to par.

Any thoughts?

 

[DSM_PWR]

Try a compession test/leak down test... could be time to replace rings

Unless its an oil leak... as in gasket from the valve cover

 

[TuRBoTaLooN]

Is your catch can vented? Is it connected to your intake pipe?

If you still have your PCV hooked up, your catch can should NOT be vented and SHOULD be connected to your intake pipe to operate correctly.

Also, is your motor original? Rebuilt? OEM? If you have a built block, chances are you will have higher than normal crankcase pressure and may need to modify your relief system accordingly. Personally I welded on a -12 bung and ran a -12 SS line to a vented catch can with no PCV valve, but thats because my car is more of a race car than a street car. If yours is a street car, most people will get two -8 weld on bungs to weld to the VC, run them to a catch can (NOT vented) and then run a vac line to your stock intake location. That should help.

 

[untouchablecc]

Thank you for the replys. My engine has about 15,000 miles on it if that. The compression is factory 7:8.1. I have perfect compression what factory specs call for. I think its like 168. One thing i am doing. The breather line off the valve cover runs straight to a catch can but then i dont have a line running anywhere else because i have just a filter on the turbo. Is not having that line running from the catch can to a intake pipe the cause of my problem from not enough vacuum?

 

[habitatguy187]

That shouldn't cause your problem but it can't be helping. Pull your pcv valve out and see if you can blow through it (in the direction like you were blowing into the valve cover). If you can, then it's bad, and when you boost you're pressurizing your crankcase.

Another possibility if the pcv valve and engine compression is good is the turbo oil seals. Do a boost leak test at the turbo and you should feel air coming out of your crankcase breather tube, then move up to the TB elbow and do a boost leak test there. If there's no air coming out then you know it's the turbo seals.

 

[untouchablecc]

Well i would really like to not think its my turbo seals seeing as this turbos week old and i just rebuilt it with one of my friends. I will look into it though. Everything is a possibility. Im starting to think that not having that breather line hooked up is the issue because as the turbo spools it draws out crankcase pressure through that breather, faster the turbo spools the more it draws out.