1997 Buick Park Avenue sucking like vac through the oil cap

Tiny
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?
Friday, February 26th, 2010 AT 9:35 AM

7 Replies

Tiny
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
Tiny
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
Tiny
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
Tiny
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  • 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
Tiny
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.
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Thursday, March 4th, 2010 AT 3:18 PM
Tiny
TWOINE
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  • 4 POSTS
There isn't a hose running to any of the valve covers and no port for one. And the pcv valve is located on the upper intake manifold with a sensor that locks in over it.
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Thursday, March 4th, 2010 AT 7:15 PM
Tiny
DOCFIXIT
  • MECHANIC
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Is there a knocking sound coming deep within engine?
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+1
Tuesday, March 9th, 2010 AT 9:31 AM

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