what blocks to stay away from

[bobbiemartin]

There is no guarantee on the blocks. Our 1995 Suburban had a 929 or 141 block (can't remember). This block is from a 2WD Suburban with 185,000 miles basically used as a daily driver by my wife, never really worked hard in its life. We are the original owners, so I know the history from new. The second main saddle is cracked all the way up to the cam bearing on the right and on the left into the bottom of the cylinder. A couple other smaller cracks on other mains as well. Incidentally, the crankshaft mains & rods still measured at factory specs.

It was replaced with a used 506 block with oil squirters. I removed the pan on the 506 block and could find no cracks. One would think it should be the other way around, so you never know.

 

[NVW]

My 95 has the 141 block, it seem to be a roll of the dice some years

 

[Anubis]

what about heads ...... what years are less prone to cracking?

while I am thinking about it .... anybody use Even's Waterless Coolant?

 

[chevyCowboy]

what about heads ...... what years are less prone to cracking?

while I am thinking about it .... anybody use Even's Waterless Coolant?

there was a whole long thread bout it try searching for it