GrandmasterCow

iTrader: (5)

Hey all, i just plastiguaged my crank to bearings and have come up with the following measurements:

1 = .002
2 = .0015
3 = .001
4 = .0015
5 = .002

These are clevite bearings in an 2003 ls6 block with a stock crankshaft. someone told me those numbers should be more closer together.

5_02ls1

iTrader: (20)

id have that crank turnes 2 and 4 are a lil loose most shops only charge like a 100 bucks you will need oversized bearings though

oange ss

iTrader: (50)

cant get much closer than .001, but i would look into gettin the crank polished more to open up the clearances on #2,#3 and #4.....IIRC you should shoot for about .0025 for main clearances

ChucksZ06

iTrader: (9)

First of all do not bet the farm on plastigage...it gives you an idea but you need someone who knows what they are doing to check the crank and bearings with a micrometer. Your clearances look ok to me. With the ls aluminum block you do not want over .002 main clearance or you will have oil pressure problems...remember the aluminum block expands with heat so you will gain clearance with engine at operating temp.

GrandmasterCow

iTrader: (5)

thanks you guys for your help i had a mechanic with a micrometer take a look today and took care of it.