1991 Chevy Corvette Compression Test

Tiny
BRIAN4081
  • MEMBER
  • 1991 CHEVROLET CORVETTE
  • V8
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
I am looking at purchasing a Vette with a 454ci and I would like to know how to perform the compression test, but more importantly what are the readings that are considered an acceptable range?
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Thursday, April 24th, 2008 AT 9:58 PM

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Tiny
MHPAUTOS
  • CERTIFIED MECHANIC
Hi there,
you will need to do a comp test hot, and check each cylinder with a strong battery and make sure the throttle is fully open. As for the readings you will want to be getting mid 150's PSI with a max tolerance of about 10% high to low readings, If all the readings are a bit lower and even that will be ok as well.

Mark (mhpautos)
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Thursday, April 24th, 2008 AT 11:33 PM

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