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.
Intake Manifold Gasket May Leak Coolant or Engine Oil on Chevrolet Silverado 1500
Average mileage: 152,333 (143,000–160,000)
Engines affected: 4.3L V6, 5.3L V8
6 people reported this problem
2 people shared problem details
1999 Chevrolet Silverado 1500- 4.3L V6154,000Visitor
Loosing 1 qt of coolant approximately every 1000 miles. No evidence of leaks. Oil looked okay, no evidence of coolant in oil. Removed and replaced intake manifold gasket. Coolant loss stopped.
2000 Chevrolet Silverado 1500- 4.3L V6Visitor
slight loss of coolent have been told intake vale leakage ,aloss of half cup every 2 weeks
oil smells like antifreeze
where to find oil pump?
I have a blown intake gasket and im wondering which one im to replace the upper, lower or both....
can this be caused by an intake leak.
morning startup will start right up but very ruff idle rpm's up&down step accel up let off stil...