Engine/Exhaust - Component Damage Due To Engine Failure

Information

IB06-03-S001

Info On Close-Coupled Converter, Engine Breakdown Or Non-Function Due To Severe Overheat Or Lack Of Oil Causing Engine Failure

ISSUE DATE: MAY 2006

Affected Vehicles:
2006 Isuzu i-280/i-350 (TI)

Service Information

2006 Isuzu i-280/i-350 are equipped with a new style of catalytic converter, technically known as the close-coupled catalytic converter, which provides quick catalyst warm-up and results in lower tail pipe emissions earlier in the vehicle operating cycle.

If an engine breakdown or non-function were to occur (such as broken intake/exhaust valve(s) or piston(s)), debris may be deposited in the converter through engine exhaust ports. If the engine is non-functioning due to a severe overheat event, damage to the ceramic "brick" internal to the catalytic converter may occur. This may result in ceramic debris being drawn into the engine through the cylinder head exhaust ports.

If a replacement engine is installed in either of these instances, the replacement engine may fail due to the debris being introduced into the combustion chambers when started.

When replacing an engine for a breakdown or non-function, an inspection of the catalytic converters and ALL transferred components (such as exhaust/intake manifolds) should be performed. Any debris found should be removed. In cases of engine failure due to severe overheat, dealers should also inspect for signs of melting or cracking of the ceramic "brick" in each catalytic converter. If damage is observed, the converter should be replaced.





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