Best way to repair cracked block?

WW2Imp · Post by **WW2Imp** » Thu May 11, 2006 7:21 pm

My engine block has some exterior cracks on the driver side in the cylinder area. I am assuming this is from freezing over. I don't want to pull the engine to make this repair. Is JB weld good enough?

pfarber · Post by **pfarber** » Thu May 11, 2006 8:15 pm

Not sure what the max temp for JB weld is... figure it will get at least 2-300 deg on the exterior of the block.

Did you check the closest cylinders for water/antifreeze? If the waterjack froze and cracked the block the freeze plugs need a'looking at (most motors have freeze plugs) and so will the cylinders.

I would probibly worry more about the block expanding/contracting and popping the JB weld out... its only an epoxy and that stuff is not known for its flexibility.

armydriver · Post by **armydriver** » Fri May 12, 2006 1:04 pm

I hate to be the bearer of bad news, but I don't see any other alternative but to pull the engine and have it rebuilt, with a new block. You can try JB Weld, they claim to be able fix blocks, but I would not trust it on something that important.

Matt · Post by **Matt** » Fri May 12, 2006 1:53 pm

Blocks can be welded,but it depends on how serious the damage is,how deep the crack runs etc. you need a real pro welder to do the work who understands the metal he is working with.

If you have no success in finding a welder to do it in the MV world try talking to a guy who restores vintage tractors.

Whatever you decide to do you will need to remove the engine from the truck.

Matt.

Jeroen Sleijpen · Post by **Jeroen Sleijpen** » Sun May 14, 2006 1:50 am

welding causes in most of the times new cracks as the block is of a very old casting sort...
best way is to get it to a repair shop where the do the drill method and drive in steel pens... this is the best way I have seen untill now