1998 buick park ave.. with 3.8.. dexcool coming from the back of backside by the tb and intake.. residue goes from intake to transmission.. he just asking me to fix the car my quess when i seen it was intake gaskets and waterpump.. also a tune up cause the plugs are shot and the wires probably are too... he has a new tstat and radiator.. any other ideas... idk where to get a compression tester from...