Question on 5.7L Chevy V8 compression

[McGillicuddy]

A couple of other thoughts:

You might want to inspect the water jackets on the risers (elbows). If they are clogged (and this may kill more engines than we'll ever know) the exhaust will not cool and the engine will overheat - bent rods and all sorts of bad things happen.

It may also be that someone put the wrong oil in her. My GM small block used 30W. Once my partner changed the oil and used 10W-30 instead. Within a mile, it made a couple of terrible clangs and over heated. Needed thicker oil.

Finally the water pump could be going bad.

[nestorpr]

Thanks guys, I knew I would get some good advice here. I'm going to reseal the drive anyway so I'll rebuild the pump then (I already replaced the impeller on the engine) and will check the manifolds, that may have been the cause of the overheat since the previous owner did tell me that they needed replacing. I think you may be right, after such a long layup the rings or valves on #5 may be stuck, I'll run her and then do a thorough compression and leak check. Heck, I may be up and running by March, Thanks!