1998 Chevrolet S10 Q&A
1998 Chevrolet S10 Question: What would cause oil to get in the coolant of a 4.3 vortec?
OIL IN COOLANT. Defective oil cooler, it's part of the radiator! Any coolant in oil? - pushrod
maybe from old rad. flush system and see if it comes back. could also be leaking intake gasket - globalhelper