i just bought this 90 crx si for 300 with no rust. the only problem witth it is that the people said that the head is cracked and the timing belt has jumped a couple teeth. but i think it is just a blown head gasket and the bad timing. how do you tell the difference between the two. i know checking the comp. but would it be the same low comp. My ? is how to tell the difference between them two.

thanks in advance

 

pull the head off and check