I Might Just Know What I'm Talking About
Join Date: Sep 1999
Thanked 0 Times in 0 Posts
Re: ailing 258 - how bad is it????
I think it is a common opinion that a 258 wil run for a long long time if it's got oil in it. [img]/wwwthreads_images/icons/smile.gif[/img] I had 195,000+ on mine before I replaced it, and it still ran ok.
If the jeep needs other important improvements, fix the leaks and keep running it. New valve cover gaskets, oil pan gasket, rear main, etc., aren't that much $. Of course, if the compression test says it's not good (like one cylinder really weak compared to the others), then I'd reconsider that. If all the cylinders read about the same, even if they are kinda low, and if the motor is solid, just tired, it'll run for a long time, in my opinion. Mine used to push so much oil out the breather that I rigged up a quart oil bottle catch mechanism to catch it all. I even had the timing chain get so loose that when I went to start it, it would turn a bit then stop solid (!) because it was trying to jump a tooth. She'll run a long time before things go bad.
Personally, I did the nutter bypass on my old motor, and wasn't impressed. I prefer the GM HEI much better.
Just my opinion.
88 YJ - trails/beach trips only![img]/wwwthreads_images/icons/smile.gif[/img]
79 4WD F250-hauler/tower of my toys
70 Jaguar E-type - the best car England ever made. [img]/wwwthreads_images/icons/cool.gif[/img]
90 Honda CRX - Daily pavement-pounder. 42 MPG. [img]/wwwthreads_images/icons/cool.gif[/img]