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05 s40 whirring/whistling noise

Help, Advice, Owners' Discussion and DIY Tutorials devoted to the second generation C70, S40 and V50 Volvos -- awkwardly model year 2004 ½ onwards -- plus where to go for advice and discussion on Volvo's sporty C30 Coupe powered by Volvo's ubiquitous inline 5-cylinder power plant.
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clark0505
Posts: 1
Joined: 29 June 2017
Year and Model: 2005 S40
Location: Louisville

05 s40 whirring/whistling noise

Post by clark0505 »

My s40 is making a whistling noise that stops when you remove the oil cap or dipstick. I am thinking it’s tje PCV system. Is there a write up for replacing this? I can’t seem to locate one. Thanks

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RickHaleParker
Posts: 7129
Joined: 25 May 2015
Year and Model: See Signature below.
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Post by RickHaleParker »

If you suspect the PCV system, first do the PCV glove test to confirm it.
Make sure you tie down the glove with a zip tie so that it does not get sucked into the engine.
Limp = pass, Erection = fail.

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1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.

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