Service bulletin M110708
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10147696 |
| Published by NHTSA | 2018-11-13 |
| Manufacturer's number | M110708 |
| Manufacturer's date | 2015-03-01 |
| NHTSA component | ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV) |
NHTSA's summary
Crankcase Ventilation System Diagnosis and Measurement. INFORMATION All current MINI engines incorporate a pressure-controlled crankcase ventilation system. The crankcase ventilation systems use various different crankcase ventilation valves, depending on the engine type. Although the valves all look different, they function similarly, using a spring and diaphragm assembly to control the crankcase pressure. A properly functioning pressure control valve is designed to maintain a slight vacuum (underpressure) in the crankcase, which assures reliable crankcase venting during all engine operating conditions. Some of the causes and results of a malfunctioning crankcase ventilation system are listed below. Causes of Excessive Overpressure (Pressure) ? Internal engine damage/wear ? Obstruction in the crankcase ventilation system ? Defective pressure control valve Results of Excessive Overpressure ? Damage to the engine oil seals ? Increased engine oil consumption (can be misdiagnosed as a defective turbocharger) ? Excessive engine oil in the intake system ? Excessive engine oil in the charged intake tubes or the intercooler on turbocharged engines (can be misdiagnosed as a defective turbocharger) ? Engine oil dip stick is dislodged from the guide tube (if equipped) Cause of Excessive Underpressure (Vacuum) ? Defective pressure control valve Results of Excessive Underpressure ? Damage to the engine oil seals ? Increased engine oil consumption ? Excessive engine oil in the intake system ? Rough engine idling or engine misfire ? Whistling or howling noise from the engine (can be misdiagnosed as a defective turbocharger)
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Engine, Exhaust and emissions, Crankcase ventilation (PCV)
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Listing a model year does not mean every vehicle of it is concerned: the document says which.