1989 Other Mitsubishi Models compression

1989 MITSUBISHI
190,000 MILES • 4 CYL • 2WD • AUTOMATIC
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TIMSMIGHTYMAX
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  • 1 POST
i got this pickup that is used for work.i am not getting compression out of the third valve.is it safe to assume that i need to get the valve machined or what else could it be?
Dec 27, 2007 at 7:30 AM
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MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Hi there,

An air pressure test will prove the valve problem. If your valves are adjustable, make sure that they have clearance when hot, if so one would presume a valve has burnt out. but the air pressure test will prove it.

Mark (mhpautos)
Dec 27, 2007 at 7:48 AM
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