Intake manifold gasket leaks with coolant and oil mixing
ENGINE AND ENGINE COOLING
16 NHTSA complaints · 2004-12 → 2013-10
“MANIFOLD INTAKE GASKET FAILURE (LEAKING MASSIVE AMOUNTS OF COOLANT/WATER INTO CRANKCASE) WITH ONLY 60,000 MILES ON THE ENGINE!*AK”
“2002 BUICK CENTURY INTAKE MANIFOLD/GASKET FAILS AT 31K MILES. COOLANT IN THE ENGINE AND MIXED WITH THE OIL. ALL OF THE PRIOR SERVICE AND MAINTENANCE WERE PERFORMED AT GM DEALERSHIPS (WHERE THIS SHOULD HAVE BEEN DISCOVERED PRIOR TO FAILURE)”
“HAD SERVICE ENGINE LIGHT COMING ON PERIODICALLY AND WAS LOOSING COOLANT, BUT COULD NOT FIND ANY LEAKS, WAS TOLD IT WAS PROBABLY FAULTY LIGHT, OR LEAK IN TANK. TOOK CAR FOR OIL CHANGE AND ASK TO LOOK FOR ANY LEAKS, FOUND COOLANT IN OIL”