NHTSA Complaint #11298241 — 2016 CHEVROLET CRUZE

DURING DIAGNOSTIC FOUND EXCESSIVE OIL MIXED IN WITH THE COOLANT ALL THROUGH THE ENGINE. REMOVED SPARK PLUGS AND FOUND CYLINDER #4 HAD COOLANT ON TOP OF THE PISTON AND THE SPARK PLUG WAS SATURATED IN COOLANT AS WELL. REMOVED CYLINDER HEAD AND CLEANED HEAD GASKET SEALING SURFACE. INSPECTED FOR ANY SIGNS OF CRACKS AND FOUND NONE. USING A STRAIGHT EDGE COULD NOT FIND ANY AREAS OF THE CYLINDER HEAD THAT WERE WARPED OR DAMAGED INDICATING A HEAD GASKET FAILURE. HOWEVER ONLY FOUND OIL IN COOLING'SYSTEM BUT NO COOLANT IN THE ENGINE OIL. REMOVED OIL DRAIN PLUG AND FOUND NO SIGNS OF COOLANT. REMOVED TRANSMISSION DRAIN PLUG AND FOUND NO COOLANT IN THE TRANSMISSION FLUID EITHER. AFTER INSPECTING OIL COOLER FOUND IT HAD INTERNALLY FAILED CAUSING THE OIL TO LEAK IN TO THE COOLANT. RECOMMEND REPLACING HEAD GASKET, RADIATOR INLET HOSE, OIL COOLER INLET HOSE, HEATER CORE INLET HOSE, HEATER CORE OUTLET HOSE, BOTH TURBO CHARGER COOLER HOSES, THE TURBO CHARGER OIL INLET PIPE AND THE TURBO CHARGER OIL RETURN PIPE. AFTER COMPLETING REPAIRS CLEANED COOLING SYSTEM AND FLUSHED WITH WARM WATER 4 TIMES BEFORE FILLING COOLING SYSTEM WITH COOLANT. TEST DROVE VEHICLE AND NO PROBLEMS WERE FOUND AFTER TEST DRIVE. RECOMMEND CUSTOMER HAVE COOLANT FLUSHED DURING. NEXT .. OIL . CHANGE TO REMOVE ANY OIL THAT MAY HAVE BEEN LEFT IN THE COOLING SYSTEM AFTER REPAIRS WERE MADE