1989 Ford F-150 Is the engine repairable?

Tiny
DLRICHMOND81
  • MEMBER
  • 1989 FORD F-150
  • 6 CYL
  • 2WD
  • MANUAL
  • 220,000 MILES
Third cylinder from front has no compression. I put about 1.5 ounces of oil in cylinder and turned over engine and got 140 psi. Seems it is a piston/cylinder problem not a valve. What is the best next step? We really want to keep/fix the truck if it is not dead. Oil got very low about 2-3 quarts in system when this happened. Was not burning oil but valve cover was leaking. Thinking about pulling the head to inspect but is their any other diagnostic to try before doing this? Thanks guys.
Tuesday, May 26th, 2009 AT 8:23 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

The test you have done is fairly conclusive, I wold say you have broken rings, pulling the head may show some score marks on the bore, and you should feel excessive piston slap, but you will have to draw out the piston to prove this problem.

Mark (mhpautos)
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Tuesday, May 26th, 2009 AT 8:28 PM

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