There were some faults in the casting of the 53 block, the block just designates who made it and when, there where 130000 blocks produced with the 53 on it, and those were despersed to truck companies, dodge, case tractor, mac don ect if you have it I wouldent worry to much about it just keep a weary eye, they fail because of the lack of warm up before hauling or lack of cooling:tu:

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haha, same here paid 6700 for mine and shes got the mexican block thats they only thing Im glad thats was made in mexico..

should be made in the US of A

Yea but the government will never let us do metal casting, to polluting so dont count on it any time soon..

I have the 53 block and it was a farm truck and pulled horse trailers. i have 180k and i let her get to 115+ before she moves. if its any lower i just put it in drive and coast.

I dont think i have to worry about it cracking unless im pulling the sled! (knocks on wood)

No canada it forsure would last forever...lol.

I have a 53. Mild mods. 137k miles, 35 inch tires and I tow a 7600 lb travel trailer. No problems. I let it warm up before towing.

The blocks&heads were made in Mexico by Tupy,So are these Cummins or Tupy engines?!?!

the 53 block was used up to year model 2002 i believe. and the 2nd number is usually behind that line that you were speaking of. i couldnt see it, but i felt it with my finger and my 2001 has a 55 block :rocking:

hey bud im new to the cummins world...but im buying a 98.5 24v cummins...not sure if it has the 53 block...the dealer im buying it from is 8 hrs away, and he aint saying much....have you heard of any 53 blocks in the 98 24 vavles?

Yes there also in the 98 24v because i have one in mine