Quote:
Originally Posted by DickR
Yesterday, after reading elsewhere about where cracks typically occur on that block, I looked again with a strong light. With my head nearly into the bilge, and looking up under the manifold, I saw a lengthy crack, with rust on it and some running down.
I guess two questions not resolved are whether that crack could be "repaired" and if there is any internal damage. I may put a bucket under the outdrive, or use muffs, and run the engine. I don't know if that would be definitive.
Otherwise options are long block with more labor for switching parts or new complete engine, at more cost but less labor (but more overall cost).
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If the block is cracked it's junk, trying to fix it is throwing money away at this point. External cracks are one thing, you have no idea the damage done elsewhere that cannot be seen. Without a total teardown of the engine you'll never know what else may have been compromised. Furthermore those blocks are cast iron, welding them isn't a viable option. Slapping them with some magic epoxy putty is a recipe for further problems even if the one visible crack is the extent of the damage which is highly unlikely. Kind of like dumping stop leak in a rotten radiator, it does doesn't fix the rot just prolongs the inevitable and guaranteed to give you a breakdown at the worst possible time. In my opinion you're probably looking at a new engine. Now if the crack is only in the manifolds that's a cheaper and easier thing to fix. Either way having it evaluated would be the smart thing to do.