It is normal for the radiator hose to get hard. As far as the compression, the rule of thumb is that you don't want more than a 10% difference between cylinders. You, have exceeded that. As far as a head gasket it is possible. It could be a valve leaking, worn rings.
Before you tear into the engine, check simple things. Check for vacuum leaks. Check the idle air control valve. Is there oil mixing with the coolant?
SPONSORED LINKS
Saturday, March 16th, 2013 AT 2:26 AM