Emissions - Moaning/Groaning Engine Compartment Noise

Service Measure

Engine

M11 200 04

02/10/04

Subject
Cooper S 07/02 - 07/03; Crankcase Ventilation Hose Swelling

Complaint

Customer may complain of a "moaning, groaning or whining" noise from the engine compartment when shutting off/starting the engine or under acceleration.

In some cases, vehicle drivability is also affected - complaints of rough idle and/or poor acceleration are reported.

Cause

Deterioration of the rubber hose of the crankcase ventilation line causing swelling and subsequent vacuum leak.

Measure

On a customer complaint basis, inspect rubber hose attached to the PCV (on the valve cover). If the rubber shows signs of deterioration (swollen, soft material), replace the crankcase ventilation line with the improved part (PN 11 15 1 524 087).