S10 Blazer

Intake Manifold Gasket May Leak Coolant or Engine Oil on Chevrolet S10 Blazer

Problem Description and Possible Solution

The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Our technicians tell us that operating the engine  with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks.

Problem Data
RepairPal Verified
Average mileage: 193,535 (150,000–263,678)
5 model years affected: 1990, 1991, 1992, 1993, more1994
11 people reported this problem
Viewing 1 - 3 of 3 comments
1993 S10 Blazer 4.3 "W" 4x4. Coolant mixing with my oil. Coolant/oil under plenum around spider. Truck starts right up but has hardly any acceleration. Milky gunk clogged the pcv valve and where you put oil into the motor there was milky gunk.