Symptom Tree t027
| Cause | Correction |
|---|
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Crankcase ventilation system is plugged |
Check and clean the crankcase breather and vent tube. Refer to Procedure 003-002 in Section 3. |
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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 in Section 7. Refer to the OEM service manual. |
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|
Turbocharger oil seal is leaking |
Isolate the turbocharger to determine if the turbocharger seals are leaking. Refer to Procedure 014-010 in Section 14. |
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Air compressor is malfunctioning |
Isolate the air compressor by disconnecting the air inlet and outlet lines. Refer to Procedure 012-003 in Section 12. 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 in Section 3. |
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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 in Section 2. |
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Cylinder liner, pistons, or piston rings are worn or damaged |
Check the pistons, piston rings, and cylinder liners. Refer to Procedure 001-043 in Section 1, Procedure 001-047 in Section 1, and Procedure 001-028 in Section 1. |
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