kshansen
Senior Member
- Joined
- Mar 11, 2012
- Messages
- 11,173
- Location
- Central New York, USA
- Occupation
- Retired Mechanic in Stone Quarry
Is that a special bearing with all the balls off to one side to make room for more grease?
TS, long ago bought a new '75 chevy 3/4 ton. At 120K miles, shoved the the throw out bearing thru the pressure plate plowing snow one night. In those days, and that truck, was easier to pull the engine than the trans and transfer case to clutch it. Thought I would go ahead and roll bearings in while I had it out. Bought new, never opened up before, so just rolled in standard rods and mains. Reinstalled, lit it up, and had 0 oil press at idle, 5 lbs high idle. WTF? Dug the old shells out of the scrap. New, from the factory, .009 under mains, .0005 under rods. Owned a lot of trucks since then, but never another chevy. Bastids...Better mic each crank housing bore with main cap at 150 lb ft torque. Trust nothing.
Years ago-I found one crank pin .010 under on a factory built Ford 429. Engine had never been into.
I bought the engine from original owner.
Stamping cranks was born out of old machine standards years ago. No one does that anymore.
If I was assembling a Cat or Cummins I would stamp abbreviation LS-liner shim .020 or for Cummins
LPF-lower press fit-20/40 then followed by my initials.
don't trust any factory or any individual's work or words on history.