Symptom Tree t027
| Cause | Correction |
|---|
|
Crankcase ventilation system is plugged |
Check and clean the crankcase breather and vent tube. Refer to Procedure 003-002. |
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|
Centrifugal bypass filter is malfunctioning |
Disconnect and plug the air supply line to the filter. Check for blowby again. If blowby is within specifications, repair the filter. Refer to Procedure 007-012 and the OEM service manual. |
|
|
Turbocharger oil seal is leaking |
Check the turbocharger compressor and turbine seals. Refer to Procedures 010-040 and 010-049. |
|
|
Air compressor is malfunctioning |
Isolate the air compressor by disconnecting the air inlet and outlet lines. Refer to the Holset® Air Compressor Master Repair Manual, Bulletin 3666121. Check blowby. If blowby is within specifications, rebuild or replace the air compressor. |
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|
Rocker lever housing or rocker lever housing gasket is leaking intake air into the crankcase |
Inspect the rocker lever housing for cracks. Inspect the gasket for tears and breaks. Inspect the gasket sealing surface for scratches and cracks. Refer to Procedure 003-013. |
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|
Cylinder head valve guides are excessively worn |
Check the valve guides for wear. Replace the cylinder head if necessary. Refer to Procedure 002-004. |
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|
Cylinder liner, pistons, or piston rings are worn or damaged |
Check the pistons, piston rings, and cylinder liner. Refer to Procedures 001-043, 001-047, and 001-028. |
