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Old 08-17-2016, 01:52 PM   #1
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Default Oil Leak After Turbo Install

So I just got done searching and couldn't really find an exact answer. So I've got a 1992 that I just finished installing an MK Turbo kit. It's got 103k and ran great before install, not a single drip of oil. For the first couple days it ran pretty well, but a couple days ago I started to notice I was losing a lot of oil. As in I would fill it to the F on the dipstick and after driving there would be no oil on the stick. Now the car is in the shop right now getting a new clutch in and I asked the guy if he could find out where it's coming from. He said it looks like the CAS o ring and possibly the rear main, and maybe a few other spots.

My question is, could me adding boost to my engine cause these places to leak oil. Would replacing all the seals fix this or with more boost will oil still find its way out of these locations. I've never boosted more than about 5psi until I get the new clutch in.
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Old 08-17-2016, 03:58 PM   #2
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Could have been a minor oil leak that you never noticed and adding boost caused it to leak worse.
I was warned about the above happening to my car when adding boost.
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Old 08-17-2016, 04:01 PM   #3
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Yes, it can. If you don't modify the PCV system to make sure it's sealing out boost 100% you will pressurize the block and blow oil out everywhere.

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Old 08-17-2016, 04:04 PM   #4
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Yes, it can. If you don't modify the PCV system to make sure it's sealing out boost 100% you will pressurize the block and blow oil out everywhere.
That makes sense. What's the best solution to modify the PCV system so it's 100% boost free?
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Old 08-17-2016, 04:17 PM   #5
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Check valve or a 323 gtx PCV valve or the autozone valve I linked in my thread somewhere.

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Old 08-17-2016, 05:22 PM   #6
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Check valve or a 323 gtx PCV valve or the autozone valve I linked in my thread somewhere.
Awesome thanks! That seems more or less the problem because oil seemed to be squirting everywhere and I've never had an oil leak as bad before the turbo install.
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Old 08-18-2016, 10:52 AM   #7
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CAS o-ring would be my first guess, but if you are having the clutch changed, there is absolutely no reason not to change the rear main seal at the same time.
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