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#1
07-01-2008, 10:17 AM
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'02 Regal- Severe vacuum in crankcase
'02 Buick Regal w/3800 motor. When idling, I pull the oil cap off (takes some effort) and a rush of vacuum is sucking through the filler cap. Also hear a great amount of vacuum coming from the air filter box. Also...when hot...just coming off freeway, a loud 'whining' noise from the engine compertment like a pully bearing going. Some say PCV housing, but all looks good. Any ideas b/4 getting soaked by a repair shop? Thanks
Last edited by Steve'o; 07-17-2008 at 09:49 AM. 
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#2
07-01-2008, 12:49 PM
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Re: '02 Regal- Severe vacuum in cranckcase
When was the last time you changed the PCV valve? It is possible that it is clogged and it is causing too high a vacuum in the crankcase. I would start with that before going to the shop.
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#4
07-02-2008, 01:55 PM
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Re: '02 Regal- Severe vacuum in cranckcase
Run an engine vacuum test with a 0-30 in-hg automotive vacuum gauge. Look for 15-22 in-hg. Possibly a vacuum leak via the upper intake manifold. Bad UIM to LIM gasket which is not uncommon on '99 and up models.
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#5
07-07-2008, 10:13 AM
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Re: '02 Regal- Severe vacuum in cranckcase
That's where I'm heading next. With a stethascope, you can hear a slight vacuum leak around the plenum. Any trick to replacement of the gasket?
Thank you!!
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