Oil in my radiator

[PuddleJumperRic]

I have a 93 Festiva which had 156K miles on the engine and swapped engines from a 89 Festiva with 85 K miles on it. The new engine starts and runs great, but engine oil is getting in to the cooling system. The water from the cooling system is not getting in to the engine oil. The fellow I bought the engine from thinks it may have had a freeze crack. But I am thinking more on the head gasket. Can anyone tell me how to find the leak and/or determine if it's the head gasket?
Thanks,
Rick

[Guest]

head gasket.. :banghead:

[darkdan]

You can do compression tests, leakdown tests, etc....

Chances are, head gasket.