blowing out dipstick, and BOV

Discuss topics related to the CA18DE and CA18DET series engines.
VanSil-80
Posts: 35
Joined: Tue Jan 18, 2011 11:54 am
Car: 1989 180sx, silvia front end, ca18det.

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Fresh rebuild, thousand kilometres on it. A bit of oil is blowing out of my bov, and my dipstick popped out once. My pcv seems to bee eliminated, there's a 2 inch rubber hose on it with a bolt in it. Could this still be the issue? If my crank case can't vent that would cause pressure to pop my dipstick out. Also, could high oil pressure cause the bov to shoot oil. Seals on the turbo are fine.. I njust don't see how oil could get past my secondary butterflies and throttle plate.. Should I stop driving it, tear her down and replace the rings? Am I f*** here? :(


Chris859
Posts: 407
Joined: Mon Aug 07, 2006 10:09 pm
Location: Pinetop, Az

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Without knowing your setup - the plugged pcv tube is most likely why you have excessive crankcase pressure. Further, if you have the left side valve cover still connected to the turbo inlet tube - that is how oil is getting dumped into your intake. Without a functioning crankcase ventilation system/catch can on a turbo car that is exactly what happens... As far as worrying about the rings - do a compression test - if the results are good then thats not the issue.

VanSil-80
Posts: 35
Joined: Tue Jan 18, 2011 11:54 am
Car: 1989 180sx, silvia front end, ca18det.

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The pcv is plugged on the intake, then on the intake valve cover and exh valve cover I have my catch can lines, routed to my vented catch can. The only thing I can see being plugged is the one hose running off the back of the intake valve cover, near the pcv. I'm going to racing greed to get a leak down test done because I'm clueless. I'm running a gt3076r, wiseco pistons k1 rods tomei valve springs, hks cams.. Hks ssqv. Z32 maf, nistune.

TheMAN
Posts: 272
Joined: Wed Jul 20, 2011 10:36 pm

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please read this thread:
oil-catch-can-questions-t542852.html

whoever hooked up those lines had no clue how the PCV system works... you need to fix that in order to stop those blowouts


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