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Thread: Oilpan leak, boosted crankcase?

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Posts: 1-10 of 35
2010-04-26 19:19:33
Oilpan leak, boosted crankcase?
I've been battling an oilpan leak since building my motor 7k miles ago. I built it to spec with a leak. Attempted to fix last year to spec again, leak. 3rd try over the weekend I cut my own gasket and used rtv. After test run, leak. Now I also have a protruding dipstick whenever I boost, but it doesn't shoot out like I've read about. Just kind pops out passed the rubber and sits there. My theory is basically I'm forcing the oil out of the pan. It was a new pan when I built the motor. Ideas? Everything seems to be installed correctly so as to not be boostin the crankcase. A friend suggested cut and use just a gasket, no rtv. Help please, thanx
2010-04-26 20:28:19
have you looked for cracks on the pan or block?

Also how do you have your PCV system setup? Do you keep any positive pressure from entering?
2010-04-26 20:29:57
if the dip stick is popping up the crank case is seeing boost.
2010-04-28 02:40:26
Originally Posted by cortrim1
if the dip stick is popping up the crank case is seeing boost.

how does one fix that? Is that a sign that the motor is on its way out?
2010-04-28 03:53:39
Originally Posted by Scrildo
how does one fix that? Is that a sign that the motor is on its way out?

it is usually caused by a bad pcv valve. I say that because the dip stick is not being blown out causing oil to spray. that is caused by the valve cover being connected to the cold side of the ic piping. Bad rings can also cause the crank case to be pressurized.
2010-04-28 04:30:12
Yea my dipstick used to pop out before I even boosted the car. I really need to change that damn pcv valve, its been months since I noticed that.
2010-04-28 11:50:08
pcv valve and get a nice catch can. alot of the times the pcv valves can be saved just get some carb cleaner and clean it then shake it till you can hear it rattle and its good, they are cheap but if you dont have tro spend that extra mnoey its whatever
2010-04-28 12:50:26
A lot of the pcv I see now are just a one-way valve. You shake it and hear nothing. I would take it off and replace it. Its only $2.

If you continue having problems make sure the crankcase ventilation is good. check for blowby, then check compression.
2010-04-29 02:30:11
pretty sure my pcv is good, it was fairly new in the build. only 7k on it. this talk of the catch can makes me wonder, i had to relocate its positioning. when i had my external wastegate welded to the manifold, i failed to take into consideration reinstalling the catch can. it was imposible to reinstall in the stock location. i also rerouted the associated hoses with the catch can based on a write-up on here. i will check things and post pics of my catch can location tomorrow. i have slight smoke upon initial fire on a cold motor, nothing afterwards. i doubt its the rings. ran a damn good time last year at the track and continue to make plenty of power although i should compresion test. thanks guyd for your help thus far. obviously the dipstick suggests a boosted crankcase, but does this sound relevant to my oil pan leak issue?
2010-05-01 14:12:48
PVC is good. I removed the hose to the intake manifold and blew on it. It pressurized without question. I'm not understanding how the catch can would cause a pressurized crankcase. Please explain. What if I remove it all together? Next stop, compression test. Just gotta locate the gizmo to do it and friend has somewhere.
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