Engine block cracked

[M543A2]

Try a sealant like the Alumaseal or Barr's Leak and cut a notch in the rubber seal on the spring loaded part of the pressure radiator cap to remove pressure. We do not run pressure on any of our vehicles. If the cooling system is in good order, you will not have a problem. Amazing how much less radiator, water pump, etc. repair we do without the pressure! It might not leak without the pressure. This might scare some, but it has worked for me on vehicles, construction equipment, and farm equipment for 40 years or more here in N. central Indiana. Now I am telling my approximate age!!
Regards Marti

 

[JasonS]

Try a sealant like the Alumaseal or Barr's Leak and cut a notch in the rubber seal on the spring loaded part of the pressure radiator cap to remove pressure. We do not run pressure on any of our vehicles. If the cooling system is in good order, you will not have a problem. Amazing how much less radiator, water pump, etc. repair we do without the pressure! It might not leak without the pressure. This might scare some, but it has worked for me on vehicles, construction equipment, and farm equipment for 40 years or more here in N. central Indiana. Now I am telling my approximate age!!
Regards Marti

While it may not be a problem with the dry sleeve multifuel, running a zero-pressure cooling system will increase the likelihood of cavitation erosion in wet sleeve engines.

 

[nhdiesel]

It also lowers the boiling point by almost 50 degrees.

Jim

 

[chemicaljohn]

So I fixed this crack in August, just haven't got around to posting pics of it. I went with stitching pins. For $125 I got 25 pins, tapping fluid, thread sealant, 2 drill bits and 1 tap. I used around 6 pins for the repair and it took about an hour to do. I've only been able to drive the truck twice since then, but nothing is leaking. If you ask me, this repair beats the crap out of anything else I could have done.

In the pic with the penetrant, the bright spot is from the first hole I drilled with a 1/8" bit to get the thickness. The very faint line below that is the crack.

 

[PaulbusMax]

Great fix! I like the Lock-N-Stitch website with all the photos of items they've fixed. I was initially drawn there by the Cummins 5.9 block repairs.

 

[chemicaljohn]

They people at Lock N Stitch were great.... very helpful, and their website explains just about anything you want to know. For the price and how long it took for the repair you can't beat it with a stick, in my opinion.