Quote:
Originally Posted by jpnovak
I would rebuild the original engine and keep it with the car. The market's do strange things and you don't want to separate unless you have to.
I would do a full rebuild at this mileage unless you have documentation that the bottom end was done. At this age the intermediate layshaft bearings will be all copper as well as the thrust bearing. Best to get in there and inspect and replace. Most likely you will find more wear on the rod bearings than mains.
|
This is good info. My car (81) lost a stud at 75k. I did the top end rebuild with Raceware studs/nuts and shipped heads to Engine Builders Supply for a complete re-do including new valves. Ramps/chains. 1997.
Never even thought of the intermediate bearings because the rod bearings were tip-top looking and well inside tolerance with Plastigage. Ring gap, blah, blah, were all within operable service parameters.
There are two members in this thread stating intermediate bearings are an issue for concern even at 100k wear. I can't speak to this but these dudes have more experience than I do.
I suspect your mains are fine. Rod bearings are a little tired.
If you want to roll the dice you can check/change rod bearings without splitting the case assuming crank journals are fine. New rod stretch bolts or an ARP/Raceware/comparable set.
FWIW, Grady Clay (RIP) said just fix what is wrong. However, he was one of those guys that had the engine on a stand in 4 hours.