1997 Buick Park Avenue sucking like vac through the oil cap

TWOINE

MEMBER
1997 BUICK PARK AVENUE
6 CYL
FWD
AUTOMATIC
174,000 MILES

I have vacuum sucking through the place where you screw the oil cap in and through the dip stick housing but all the actual vacuum ports are working too. I replaced the upper and lower intake manifold gaskets and the ploblem still assist. What can I do to fix this problem?

7 Replies

DOCFIXIT

MECHANIC
18,828 POSTS

Hi
PCV maybe blocked remove see if suction is felt on valve.
Let me know
Thanks for donate

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Friday, February 26th, 2010 AT 2:49 PM

TWOINE

MEMBER
4 POSTS

I had already checked for suction in the valve and also rechecked after you told me to. Yes it does have pretty good suction from there.

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Tuesday, March 2nd, 2010 AT 10:22 AM

DOCFIXIT

MECHANIC
18,828 POSTS

What is the fault? Running bad? No power?

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Tuesday, March 2nd, 2010 AT 12:57 PM

TWOINE

MEMBER
4 POSTS

Whats going on is that when the car is running, there isn't any oil on the dip stick at all and runs fine with a sound like theres no oil in the engine but when I take the oil filler cap off, it runs with a miss and I get plenty of oil on the dip stick without the sound that I explained above.

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Thursday, March 4th, 2010 AT 10:07 AM

DOCFIXIT

MECHANIC
18,828 POSTS

Think what is happening is no filtered air is entering crankcase. The PVC pulls air out causing vacuum while filtered air is drawn in the crankcase. Find a hose that should come from air snorkle after air filter and goes to valve cover see if it is restricted.