Originally Posted By: oldhp
KCJeep, You said PO neglected the engine. Have you tried running some trans fluid or Risole thur it? Your problem almost sounds like a piece of crud in lifter or some of the lifters.
I would get some cardboard to cover radiator and with the biggest new filter you can put on put some 0W30 and two quarts trans fluid or Seafoam/Rislone. Let it idle for at least 30 mins with as hot as you can get it without boiling over, then let it drain until it stops dripping.
New filter, new 0W30 oil, SeaFoam/Rislone run it 1000 miles, drain out. Then new filter & oil of your choice and see.
There's quite possibly stuff in engine that short of taking apart you need some drastic hot cleaning to clean it.
Wouldn't cost that much and you might be surprised what comes out.
My thoughts........
Thanks for the suggestions, I'm not anti-additive or flush by any means but I'm also not wanting to get overly aggressive and knock something loose that's going to cause problems. I've done multiple short OCI's with high detergent oils, also used MMO in it but nothing aggressive yet.
It runs so well I don't want to mess it up fixing a non-problem kind of problem. Been thinking about Kreen in it too.