okay my car is a 95 gsr with close to 149xxxmiles,i was wonderin if its time to change my head gasket since i'm seein oil and coolant by the bottom block where it says b18c1.oh and when i start up my car,it spits like blk stuff from the exhaust for a few seconds and then it stops..what are some signs of blown or bad head gasket leak, help thanks

 

oil in coolant is a dead giveaway.