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Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 2.0L (LSY)) >> Diagnostic Information and Procedures >> Coolant in Combustion Chamber

Coolant in Combustion Chamber

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Cause Correction
DEFINITION: Excessive white smoke and/or coolant type odor coming from the exhaust pipe may indicate coolant in the combustion chamber. Low coolant levels, an inoperative cooling fan, or a faulty thermostat may lead to an overheating condition which may cause engine component damage.
  1. A slower than normal cranking speed may indicate coolant entering the combustion chamber. Engine Will Not Crank - Crankshaft Will Not Rotate 
  2. Remove the spark plugs and inspect for spark plugs saturated by coolant or coolant in the cylinder bore.
    NOTE:

    Unburnt fuel could from a stuck injector may be present. Therefore we need to define coolant verses fuel.

  3. Inspect by performing a cylinder leak-down test. During this test, excessive air bubbles within the coolant may indicate a faulty gasket or damaged component.
  4. 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. Engine Compression Test 
Faulty cylinder head gasket Replace the head gasket and components as required. Cylinder Head Replacement 
Warped cylinder head Replace the cylinder head and gasket. Cylinder Head Replacement 
Cracked cylinder head Replace the cylinder head and gasket. Cylinder Head Replacement 
Cracked cylinder liner Replace the components as required.
Cylinder head or block porosity Replace the components as required.