Alot of pressure under the oil cap
11-07-2007, 11:11 AM
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Alot of pressure under the oil cap Within a few seconds of running, its building a lot pressure under the oil cap.
This is n/a car, not turbo.
Is it more likely this is a ring or a head gasket problem?
From looking in the cap, the oil looks kind of milky, so I'm assuming head gasket. But would it build up that much pressure?
Haha a/n car.. I had someone type this for me while i was at school sorry.. Anyway.. I dont have any tools here at school or I would do a compression test and change oil to see what it looks like.. I just didnt think that a head gasket would cause that much pressure.. I did look at the water and its brown so Im going with head gasket..
Now I need to decide on trailering it back to my house (80 miles) or if it would be ok to drive home. Im assuming trailering would be the best thing..
This is n/a car, not turbo.
Is it more likely this is a ring or a head gasket problem?
From looking in the cap, the oil looks kind of milky, so I'm assuming head gasket. But would it build up that much pressure?
Haha a/n car.. I had someone type this for me while i was at school sorry.. Anyway.. I dont have any tools here at school or I would do a compression test and change oil to see what it looks like.. I just didnt think that a head gasket would cause that much pressure.. I did look at the water and its brown so Im going with head gasket..
Now I need to decide on trailering it back to my house (80 miles) or if it would be ok to drive home. Im assuming trailering would be the best thing..
Last edited by Tiger2o69; 11-07-2007 at 05:27 PM.
11-07-2007, 02:52 PM
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Pressure in the crankcase is almost always an indicator of worn rings but if the oil in the crankcase looks like a milkshake there is def intermix of coolant and oil which is caused by a blown headgasket. It is possible that a head has cracked and is allowing cylinder pressure into the crankcase. Also if the engiine has been overheated severely the rings could be wiped out. To test your rings first do a dry then a wet compression test (wet means put some motor oil in the cylinder <just a capful>) and compare your compression readings if they they change more than 10psi your rings are probably smoked. A compression test will also help determine which cylinders are affected by the blown head gasket as they will have low compression numbers. Do yourself a favor dont be tempted to change just one gasket. Hope this helps. Chris
11-07-2007, 06:23 PM
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Brown water is an indication of a blown gasket or cracked head. Make sure you clean the **** out of the deck surfaces and properly tighten down the heads when you assemble it. That will ensure a good seal.
