My sons 95 Pontiac Sunfire,2.2 OHV basic pushrod, is leaking coolant from the back of the head gasket so I guess I gotta change it.Any tips?A mechanic told me not to remove the intake or exhaust manifolds just pick the whole thing up the way it is...saves lotsa time.I have a book with all the torque settings and stuff just wondering if anybody has any tips?