Noticed for the first time last night a very slight hissing sound, vapor, and coolant smell from the engine compartment. It appears to be between the 1 and 2 cylinders on the drivers side (22re). Compression is as follows (1-4): 180, 165, 180, 170. 70k since the PO rebuilt it.

The logical problem to me is a leaking head gasket, but my question is shouldn't the compression readings around cylinder 2 be much lower?? Any advice would be appreciated. Also, where do I purchase a new gasket set and while I'm at it a new timing chain? Thanks

buckgrunter