Intake manifold gasket and head gasket coolant leaks
ENGINE AND ENGINE COOLING
14 NHTSA complaints · 2001-10 → 2007-02
“INTAKE GASKET KEEPS BREAKING EVERY 40,000 MILES. I HAVE HAD IT REPLACED TWICE (ONCE AT 40,000 AND THE SECOND TIME AT 80,000 MILES) AND HAVE BEEN ADVISED BY THE DEALERSHIP THAT I WILL NEED IT REPLACED AGAIN AT ANOTHER 40,000 MILES”
“INTAKE MANIFOLD GASKET FAILURE ON MY 1998 OLDS CUTLASS RESULTED IN TOTAL DAMAGE TO MY ENGINE. AFTER RESEARCHING THIS SPECIFIC PROBLEM I HAVE FOUND IT TO BE A VERY WIDESPREAD COMPLAINT, THAT SHOULD HAVE BEEN CORRECTED AT GM'S EXPENSE”
“ENGINE ASSEMBLED INCORRECTLY OR ASSEMBLED USING DEFECTIVE MATERIALS. GASKET FAILURE ON THE INTAKE MANIFOLD ALLOWS WATER TO MIX WITH OIL AND/OR FUEL, IF LEFT UNCORRECTED THIS WILL DESTROY THE ENGINE”