VolvoEngine Parts

31338684 — 4 Pieces Oil Separator Diaphragm Engine Pcv 31338684 For Volvo C70 S40 V50 Xc60 V70

This set of four oil separator diaphragms is a key component of the engine's PCV (Positive Crankcase Ventilation) system, designed to manage crankcase pressure and emissions. Manufactured to precise specifications, these diaphragms offer superior resilience and sealing compared to worn or cracked originals that can lead to oil leaks or poor engine performance. Operators might observe increased oil consumption, blue smoke from the exhaust, or rough idling if these diaphragms fail.

4 Pieces Oil Separator Diaphragm Engine Pcv 31338684 For Volvo C70 S40 V50 Xc60 V70 – Part No 31338684 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypePCV Diaphragm Set
MaterialHigh-temperature resistant rubber
ApplicationPCV system / Oil separator
Service LifeReplace every 60,000 miles or as needed
CompatibilityVolvo C70, S40, V50, XC60, V70
ConditionNew — OEM specification aftermarket

Failure Symptoms

A common initial symptom of failing PCV diaphragms is a slight increase in oil consumption or a faint smell of oil in the cabin. If left unaddressed, the PCV system can become clogged, leading to excessive crankcase pressure that may force oil past seals and gaskets. This can result in significant oil leaks and potential engine damage over time.

Installation Tip

Carefully clean the oil separator housing and surrounding areas to remove any sludge or residue before installing the new diaphragms. Ensure each diaphragm is seated correctly and oriented as per the service manual to prevent improper function.

Service Note

Inspect the PCV hoses for cracks or blockages and clean or replace them as necessary when servicing the oil separator diaphragms.