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CBV Compressor Bypass Valve Operation

Everything on the Volvo S80. Sometimes called an "executive car", the S80 was Volvo's top-of-the-line passenger car. P2 platform.
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boosted5cyl
Posts: 1100
Joined: 29 January 2010
Year and Model: '98 V70 T5, '99 S80
Location: St. Paul, MN
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CBV Compressor Bypass Valve Operation

Post by boosted5cyl »

So the tube from my CBV to the inlet pipe busted, time for a new one of those. However I noticed there is quite a bit of air flowing out from the CVB, back towards the inlet pipe at idle, I assume that means it's leaking?
'04 XC90 2.5T AWD (Angus) 134K.
'99 S80 T6 (Medusa) 214k. On borrowed time LOL
'98 V70 T5 (Vivienne). RIP @ 228K. Spun rod bearings.
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boosted5cyl
Posts: 1100
Joined: 29 January 2010
Year and Model: '98 V70 T5, '99 S80
Location: St. Paul, MN
Been thanked: 1 time

Post by boosted5cyl »

Having read this it seems that the valve is meant to be slightly open under vacuum. Seemed a little odd to me but there you go. I guess I'll whip it off when I get the pipe and pressurize it to see if it holds pressure. I do get weird "ghost" like noise when cruising so might be time for a replacement anyway.

Part number for the hose is 1270319, which is imaginatively called "hose" in VADIS.
'04 XC90 2.5T AWD (Angus) 134K.
'99 S80 T6 (Medusa) 214k. On borrowed time LOL
'98 V70 T5 (Vivienne). RIP @ 228K. Spun rod bearings.
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