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Oil leak

Tiny
77LEBARON
  • MEMBER
  • 1992 BUICK ROADMASTER
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 163,000 MILES
I was flushing out my coolant system after many water flushes I revved the engine up to 3,000 RPM's and when I looked under the car there was a sizable puddle of oil. It appears to be coming from the top from the drivers along where the engine and transmission mate. I am hoping it is a loose hose but I fear it could be a gasket.
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Sunday, March 31st, 2019 AT 6:07 PM

7 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

From that area, it could be either the intake manifold or the valve cover gasket.

The oil pressure switch is also back there as well.

Get a bright LED light and look over the back of the top of the motor for the leak.

Roy
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Sunday, March 31st, 2019 AT 6:45 PM
Tiny
77LEBARON
  • MEMBER
  • 5 POSTS
Would the oil pressure switch or intake manifold or valve cover produce such a large amount of oil in that b10 second period?
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Sunday, March 31st, 2019 AT 6:50 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
For a ten second period, I would think the pressure switch.

Roy
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Sunday, March 31st, 2019 AT 7:00 PM
Tiny
77LEBARON
  • MEMBER
  • 5 POSTS
And would continuously leak also? My oil pressure has been different also since the leak. I will take the bright lights to that area tomorrow and notify you of my findings. Thank you
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Sunday, March 31st, 2019 AT 7:51 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Always glad to help.

Roy
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Sunday, March 31st, 2019 AT 7:54 PM
Tiny
77LEBARON
  • MEMBER
  • 5 POSTS
Well I do believe from my amateur inspection that the primary leak is the oil pressure switch. I have the shop manual and supplemental coming in also. Another seepage leak is coming from the front of the intake manifold someone did a horrible gasket job on it. Thanks Roy for the input and if and when other questions arise I will be back here.
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Saturday, April 6th, 2019 AT 2:44 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You're welcome.

Always glad to help.

Roy
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Saturday, April 6th, 2019 AT 3:02 PM

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