Okay, here's one for the real experts. Have a '73 Ford F250 with a 390 engine bored to about 400 with a torque cam. Did the rebuild 74,000 miles ago and truck has been a real gem. Was pulling a pretty hefty grade a week or so ago, engine running good, warmer than normal because of the long grade pull. Suddenly engine began missing on one cylinder. Pulled over to check and, although temp was pretty high the new radiator seemed to be doing the job but pushed about a quart of water into the overflow container once the engine was shut off. Check water in overflow tank, no oil. Check oil, no water. Check exhaust no oil or water. Started it up, oil pressure normal, still missed like crazy but decided to drive remaining 35 miles home. Made it fine with no further problems other than steady miss. Pulled all plugs and did a compression check. Cylinder #7 had virtually NO compression, even with just my finger in the plug hole. Cylinder #6 showed only about 60 psi while all other cyls had 120-130 psi. Still no water in oil or oil in water. Truck starts easy and runs fine except for steady miss. I have dual exhaust and the driver's side exhaust is actually cool at idle while the passenger side is hot. No oil or water at either exhaust pipe. Okay guys...what the problem?
- posted
19 years ago