oil spits out dip stick and breather - Hot Rod Forum : Hotrodders Bulletin Board
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Old 12-11-2003, 03:48 PM
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oil spits out dip stick and breather

i have a 77 350 gmc in a 87 chevy truck and the oil spits out the breather and the dip stick when there in place and the pcv valve is in. when take out the pcv vavle or the breather it runs good no oil is spiting out , the engine sounds good and i did a compression test that was 165-160 on all tests no one around here can give me a reason head gasket?

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Old 12-11-2003, 03:50 PM
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Dosch13- It's only a guess, but maybe it is time to get a new pcv valve and a new breather?
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Old 12-11-2003, 03:59 PM
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Arrow

You might try a new PCV, but it sounds like you may be building too much crankcase pressure. Even when the compression reads good, you can have so much blow-by (rings) that it will pressurize the crankcase causing the kind of problems you are having.
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Old 12-11-2003, 04:21 PM
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Sounds like blow-by and your just relieving the pressure by remove the PCV valve. I bet if you take off a valve cover you'll have oil splirting out the return holes.
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Old 12-11-2003, 06:11 PM
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Agree with all above, do you have vac. to the PCV?
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Old 12-11-2003, 06:27 PM
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Tha PVC sucks air out creating a major vacuum. So make sure you have an opening on the opposite valve cover. Most dude call that a breather. That will fix your problem. Good luck
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