Service Information

Cruze

Coolant in Engine Oil

Cause

Correction

DEFINITION: Excessive white smoke and/or coolant type odour coming from the exhaust pipe may indicate coolant in the engine oil. Low coolant levels, an inoperative cooling fan, or a faulty thermostat may lead to an overtemperature condition which may cause engine component damage.

•	A slower than normal cranking speed may indicate coolant entering the combustion chamber. Refer to Engine Will Not Crank - Crankshaft Will Not Rotate .

•	Remove the glow plugs and inspect for glow plugs saturated by coolant or coolant in the cylinder bore.

•	Inspect by performing a cylinder compression test. Two cylinders side-by-side on the engine block, with low compression, may indicate a failed cylinder head gasket. Refer to Engine Compression Test .

Faulty cylinder head gasket

Replace the cylinder head gasket and components as required. Refer to Cylinder Head Replacement and Cylinder Head Cleaning and Inspection .

Warped cylinder head

Replace the cylinder head and gasket. Refer to Cylinder Head Replacement .

Cracked cylinder head

Replace the cylinder head and gasket. Refer to Cylinder Head Replacement .

Cracked cylinder liner

Replace the components as required.

Cylinder head or block porosity

Replace the components as required.