How much crank end play is to much?

[spooledup]

I have an 89 Cummins with 660,000 miles on it . I am checking the end play on the crank with the engine pulled and it is around . 090 . I know its time for mains but my questions are has anyone seen a high mileage 5. 9 have to much wear on the crank that a new thrust bearing will not fix? Also is there anyone that can give me the thickness of a new thrust bearing so i can compare to the old one? Lastly is the thrust bearing on both sides of the bearing ? Looking at this one it only on one side. Thanks

 

[JLEONARD]

Any crank thrust bearing I have seen is one sided. Never saw a Cummins one.

. 090 sounds like a lot but I don't have a spec book.

 

[ata]

I looked in my 97 Dodge Service Manual and it has end play on the crankshaft at . 004 min to . 017 max. I don't know if 97's are different from 89's.

 

[Paychk]

93 FSM specs 0. 005 - 0. 012 inch

 

[B.G. Smith]

It will have a thrust surface on both sides of the journal. I would guess the babbit and the bearing shell and maybe some of the side of the journal are worn away to get . 090" clearance, the front side of the bearing is usually the worn side because of thrust from clutch release on standard transmission trucks. bg

 

[cerberusiam]

Yeah, its time for bearings. The torsional harmonics get the the thrust bearings after a while and the more towing it does the faster it wears. A manual seems to wear them faster. Thats not bad mileage though, about where Cummins says they should be.