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2004 Buick LeSabre Custom 4dr Sedan

2004 Buick LeSabre
Trim Info:
Front Wheel Drive, 4 Dr Sedan Custom, Large Car
20 mpg city / 29 mpg hwy
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May 4, 2012, 1:54 pm

Steve H

Question: GM 3.8 sucks air through dipstick

2001 Buick Lesabre 3.8 engine. Was using coolant, and had a high crankcase vacuum (sucks air through dipstick tube). Replaced intake gaskets with gm aluminum lower and gm upper, still has the vacuum leak, but coolant leak seems fixed (has not lost any)

May 10, 2012, 9:44 pm

Richard W
Expert Mechanic

The vacuum could be coming from your PCV valve. I would replace it and recheck.

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May 11, 2012, 10:59 am

Steve H

PCV is new as well, and double checked seated properly

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May 12, 2012, 8:44 am

Richard W
Expert Mechanic

The only thing left is your intake. One part of the gasket could have cracked or pushed out causing your problem.

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