my friend ownes a 2001 cummins thought he had a decent block started to tare down and found a small crack in the block with stop leak in it. need some opinions on what to do now it has 140k on it????

 

This is a common problem and the only real fix is replacing the block. Drill a small hole on each end of the crack to stop it from spreading.


Theres some excellent info here including pics of my #53:

53 Block FAQ and Information

A good welder can weld it for him. But you have to know what youre doing to weld cast iron.



Check out:

http://www.locknstitch.com/

and

www.muggyweld.com

 

will all 53 blocks crack eventually or just part of them?

 

No they wont all crack. Only a small percentage (I hope).

But prepare yourself for the worst - its CAN happen, especially since many of these enges are getting some serious miles on them.

 

yep, i looked tonight and mine is a 53, dang it! its got 81000 on it so its set alot which might be a bad thing. thanks for the info. it was really good

 

no problem at all.

 

thanks guys we found a new block not a 53 series