Intake Manifold Gasket May Leak Coolant or Engine Oil on Oldsmobile Intrigue

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: 133,509 (50,000–220,669)
Engine affected: 3.8L V6
4 model years affected: 1998, 1999, 2000, 2001
20 people reported this problem
Viewing 1 - 9 of 9 comments
leaks coolants coming from the intake manifold ...it was coming from those plastic L shaped pipes because one was cracked but we replaced them..i replaced the intake manifold gasket and after i did the car wont start. it will turn over and try to crank but everytime it acts like its gonna catch it just dies and makes a poping noise...still leaks water from the manifold ...please help if you can
Mine leaks oil and water
Internal leak and mixage of coolant and oil. Lower intake manifold gasket leak. The check engine light will pop on when the car is idling and will pop on and off at various times.
I took the back to dealer 3or4 times still did not get fixed i took it to another shop they repaired gasket for water pipe from back of motor the car still runs hot they put the mieage from them was 122437
the gaskets were replaced but they let the gasket sealer dry then came back the next day and put more sealer on it. which didn't work the car was driven about 10 mins. the next day checked flulids and notice the oil was milky does this mean the engine is gone. or is there anything that can be done?
Intake leaks bad everyday
Upper intake leaked coolant into plenum and therefor the cylinders. replaced upper gasket and still leaks. going to buy a new upper manifold and a plenum to see if this fixes the problem.
Upper intake leaked coolant into lower intake which caused engine to stall and not start again.
The engine was leakking coolent and the engine shut down engine had to be replaced