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- 11 Oct 2018, 16:27
- Forum: C30, C70 2006+, S40 & V50 2004 ½ +
- Topic: 05 s40 whirring/whistling noise
- Replies: 1
- Views: 981
05 s40 whirring/whistling noise
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