how do you diagnose a head gasket problem when the engine wont start. on 1996 Ford Escort

is a compression test necessary?

Asked by for the 1996 Ford Escort
ck oil and see if it looks like a choc shake then compression test or is the cooling system full of oil
1 more answer
It would help, along with cooling system pressure test and inspection of spark plugs. What symptoms are present?.......Overheated or leak?