An acquaintence gave me a 300 he had been using while he rebuilt his new engine. It began running rough and an inspection revealed
a cracked cylinder and head. Is the block worth having the sleeve replaced or should I use the parts I need to turn my 240 into a 300? I
would rather build something in advance, to minimize down time on my truck.
The shop that found the problem quoted him $150 to re-sleeve the cylinder. This is for a future build.
Thanks.
john

 

I've never sleeved a block. It is more cost effective to just find another block - or a complete engine.

 

Resleeving strikes me as something that is done for an engine that is special, like for a matching numbers car and it's the original engine, or a block for an engine that is extremely rare/difficult to find.
However, (at least for now), the 300 is still very common and there are blocks everywhere. Much more cost effective to just find a new block.

 

Sleeving is a quite common procedure when rebuilding Class 8 diesel truck engines but it doesn't seem to have caught on much for automobile engines.