Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

Leak down test

  #1  
Old 11-06-2017, 11:35 AM
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Default Leak down test

I have owned my 1995 Volvo 850 Turbo station wagon since new. Ultra meticulously maintained. I need to figure out how to interpret a leak down test to determine if doing a valve job is worth it. Results of leak down test = Cyl #1 - 10%, Cyl #2 - 30%, Cyl #3 - 10%, Cyl #4 - 12%, Cyl #5 - 10%. Compression test = Cyl #1 - 175 psi, Cyl #2 - 100 psi, Cyl #3 - 175psi, Cyl #4 - 145psi, Cyl#5 - 175psi. Car runs well, no serious problems other than high mileage. Need to provide a reliable car to son living in Los Angeles.
 
  #2  
Old 11-08-2017, 08:50 PM
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I'm assuming the leak down was done with compressed air... where did the air go for #2 ? was their any sound coming from the throttle body or exhaust pipe? pressure coming out of the oil filler cap? You can't assume the leak down is finding a bad valve - it could be a valve, rings, cracked head etc. You can try using an inspection cam to look for any cylinder wall scoring etc. Did you try a wet/dry compression test on Cyl 2?
 
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