Coolant in Combustion Chamber
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Coolant in Combustion Chamber
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Cause
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Correction
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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 "overtemperature" condition which may cause engine component damage.
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2.
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Remove the spark plugs and inspect for spark plugs saturated by coolant or coolant in the cylinder bore.
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3.
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Inspect by performing a
Cylinder Leakage Test
. During this test, excessive air bubbles within the coolant may indicate a faulty gasket or damaged component.
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4.
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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
.
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Cracked intake manifold or failed gasket
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Replace the components as required.
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Faulty cylinder head gasket
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Replace the head gasket and components as required. Refer to
Cylinder Head Cleaning and Inspection
and
Cylinder Head Replacement - Left Side (LAU)
Cylinder Head Replacement - Left Side (LF1 or LFW)
or
Cylinder Head Replacement - Right Side (LAU)
Cylinder Head Replacement - Right Side (LF1 or LFW)
.
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Warped cylinder head
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Machine the cylinder head to the proper flatness, if applicable and replace the cylinder head gasket. Refer to
Cylinder Head Cleaning and Inspection
.
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Cracked cylinder head
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Replace the cylinder head and gasket.
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Cracked cylinder liner or engine block
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Replace the components as required.
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Cylinder head or engine block porosity
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Replace the components as required.
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