This 52mm diaphragm repair kit is for the oil separator / oil filter housing on the listed Volvo and Ford applications. Match the installed housing reference and diaphragm design before ordering.
Applications
- Volvo C30 - 2006-2013.
- Volvo C70 - 2006-2013.
- Volvo S40 - 2004-2012.
- Volvo S80 - 2006-2016.
- Volvo V50 - 2004-2012.
- Volvo V70 - 2007-2013.
- Ford Focus II - 2005-2008.
- Ford Focus II - 2008-2011.
- Ford Kuga - 2008-2012.
- Ford Mondeo IV - 2007-2015.
- Ford S-MAX - 2006-2015.
Separator Selection
Diameter: 52mm. Volvo housing references: 31338685, 30788494, 31338684 and 30677920. Volvo engine context: 2.0, 2.4, 2.5 V5; B5254T and B5244S. Ford separator reference: 1781598; Ford engine context: 2.0L, 2.4L, 2.5L V5 and 2.5L Duratec-ST. Additional reference forms: 3911117978 and 39 111 17 978. During installation, additionally securing the cover with sealant or adhesive is recommended.
When to Inspect Crankcase Ventilation
- Whistling or excessive crankcase vacuum.
- Unstable idle.
- Increased oil consumption.
- Oil deposits in the intake.
- Exhaust smoke after warm-up.
- Mixture faults associated with air leaks.
These symptoms call for inspection of the crankcase ventilation system; confirm the cause before replacing the diaphragm.
Repair Scope
The diaphragm is a repair component for the oil separator. Inspect the separator or valve cover housing, ventilation hoses and possible cracks. Diaphragm replacement may be suitable when the housing is intact; housing damage may require a different repair.
Important Before Ordering
Compare the original part number, marking, shape and mounting design before ordering. A model name alone does not confirm the required version.
FAQ
What diameter is specified?
52mm.
What additional cover fastening is recommended?
Sealant or adhesive during installation.
Can a diaphragm repair a cracked housing?
Inspect the housing and ventilation hoses first; housing damage may require another repair.
Part Number / PN
30788494,31338684,31338685,1781598,30677920,3911117978
SKU: KL31338685.
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Returns and exchanges
Request a change-of-mind return within 14 calendar days of delivery, then send the goods within 14 calendar days of notifying us. Our voluntary return option applies to unused, uninstalled, complete goods in their original condition and packaging. Exchanges are subject to availability and agreement.
The customer pays change-of-mind return shipping. No restocking fee applies. Refunds and original delivery charges are handled under our Refund & Return Policy and applicable law.
Faulty, damaged or incorrect goods
Email contact-us@klifex.net with your order details and a description of the problem. These claims are separate from change-of-mind returns. Where we are responsible, we bear the required remedy and return costs. Installation alone does not remove mandatory defect rights.
Your legal rights
Applicable statutory rights take precedence, including EU/EEA and UK withdrawal rights and legal guarantees. Necessary inspection does not remove a statutory withdrawal right; deductions for excessive handling must reflect an actual, evidenced loss of value.
Contact us for the correct return address before shipping. Our legal address is not a return address.