What would cause antifreeze and oil to mix in a LT1? Would the heads and such still be good? I ask because I have found a motor I think I can get cheap and do my first ground up build with. The fluids mixed and it had a knock so the owner guesses it's a rod or main bearing problem also. Would this motor be worth fooling with?

 

Lots could cause that, possible blown head gasket is one.

-Dustin-

 

Anything to the point that it would damage the block or heads? I really just want the block but he's selling as oil pan to intake so I figured I'd sell the extras to make up my cost. Obviously not if they are junk though. I was planing to go stroker with it if that would help anybody?

 

A blown head gasket has the highest percentage of being the problem. You can't rule out a cracked block or head without some checking by a machine shop.

 

I bought a block in that condition, but only after I dissected the oil filter from it and saw no metal particles in it. turned out that the fire ring on #7 was missing about an inch of material. I think I got a great deal considering it was a complete motor, harness, and ecm for $200