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Engine noise T5

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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gswede
Posts: 141
Joined: 28 February 2011
Year and Model: 850 R 1997
Location: Norway

Engine noise T5

Post by gswede »

My brother got a 2005 S40 T5 GT.

A couple of days ago he called me up and said he heard a "new" noise coming from the engine.
I asked him to let the car sit until further inspection. Next day i went over.
Upon starting the car no noise. Took it for a 5min drive and sure enough, an internal wosh hollow sound.

Parked the car and with bonnet open there was no sure way of defining where the noise came from. On account of numerous PCV issue threads i pulled the dipstick. Noise immediately went away, put my finger over the hole and there was quite the vakuum. When re-inserting the dipstick the sound came back albeit with a 2sec delay.

Any sure diagnosis for this?
Could it be anything other than the PCV?
Local Volvo shop claims its got nothing to do with PCV and offer no other solution.

PS the car is BSR stage II and got the BSR cai installed, dunno if it affect anything with regard to this though...
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volvodoc
Posts: 88
Joined: 29 March 2011
Year and Model: 01s60
Location: ohio

Post by volvodoc »

you have a plugged oil trap return to dealer there is a extended wro on this
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