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2017 BMW 328d xDrive PCV Valve Diaphragm

1 item

A PCV diaphragm repair kit services a specified engine's crankcase ventilation control. Match the engine and the ventilation component being repaired, then compare the supplied parts. A diaphragm kit, valve-cover cap and complete valve cover have different repair scopes; damage to the housing may require more than a diaphragm.

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PCV Valve Cover Cap Repair Kit for 2014-2017 BMW 328d xDrive

A-Premium®Part # APCBV0046

PCV Valve Cover Cap Repair Kit for 2014-2017 BMW 328d xDrive

53 Reviews

$17.99

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits BMW 328d xDrive: 2014 2015 2016 2017

Add Trim and Engine info to ensure a guaranteed fit

Vehicle: 2017 BMW 328d xDrive

Item LocatedUnited States

Quantity1

Part interchange

911115, 11127588412, 1112-7588-412, 911-115, 911 115

ConditionNew

item #1012ZT1S

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Choosing A PCV Diaphragm Repair Kit

A PCV diaphragm repair kit is intended for the crankcase ventilation arrangement on a specified engine. The A-Premium selection includes valve-cover repair kits for selected BMW and Mini applications; one Mini product lists a specific engine-code requirement.

Identify the engine and the ventilation component being serviced before ordering. A diaphragm kit, a valve-cover cap and a complete valve cover can have different repair scopes and package contents.

How A PCV Diaphragm Controls Crankcase Pressure

In a pressure-controlled crankcase ventilation system, the valve regulates airflow and pressure as engine conditions change. BMW describes spring-and-diaphragm pressure-control valves in its crankcase ventilation systems, although the valve layout varies by engine.

The valve works with the cover and ventilation passages. A damaged housing or blocked crankcase breather hose needs its own inspection; replacing a diaphragm does not correct every problem in the system.

Diagnosing Crankcase Ventilation Problems

Rough idle, oil leakage or unusual crankcase pressure can have more than one cause. Inspect the ventilation system and use the diagnostic procedure for the engine before deciding whether the diaphragm, another ventilation component or the cover is at fault.

Frequently Asked Questions (FAQ)

Is a PCV diaphragm kit the same as a complete valve cover?

A diaphragm or cap repair kit services part of the ventilation arrangement; a complete valve cover is a larger assembly. Compare the product's stated contents with the damaged part before choosing the repair.

Does every PCV diaphragm kit include a spring?

Package contents vary by product. Some repair kits combine a diaphragm, cover and spring, while another listing may describe its contents differently. Confirm which pieces are supplied with the selected kit before planning the repair.

Can a crankcase ventilation fault cause whistling?

Excessive crankcase vacuum can produce a whistling or rushing-air sound in some systems. Audi documents that symptom for certain ventilation faults, but a sound alone does not establish that the diaphragm is damaged.

Can a blocked breather cause excessive crankcase pressure?

An obstruction in the ventilation system can contribute to excessive pressure. BMW lists obstruction, a defective pressure-control valve and internal engine wear among possible causes, so diagnosis should consider the whole system.

Will a PCV diaphragm repair a cracked valve cover?

The diaphragm kit addresses the service pieces it supplies. A crack in the cover or a damaged sealing surface is a separate problem and may require repair or replacement of the cover according to the engine's service procedure.

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