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Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines. |
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2008 D5 Oil Filler Popping - Even When Vacuum Line ClampedViews : 987 Replies : 10Users Viewing This Thread : |
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#1 |
Junior Member
Last Online: Jun 10th, 2024 16:53
Join Date: May 2012
Location: Essex/Suffolk
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As per title, When I'm getting the usual popping noise, and some smoke from the oil filler, but the sound doesnt change at all when I clamp any of the vacuum lines from the vacuum pump.
Could this be the PCV? there is a fair bit of oily residue around the pipes for this. It is also chuffing out of the swirl flap lever area under load. No sound round the intake of air box, so hoping its not the dodgy valve lifter issue. Thoughts and first hand experiences of what it could be? Thanks |
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#2 | |
Premier Member
Last Online: Yesterday 20:05
Join Date: Apr 2019
Location: Manchester
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![]() Quote:
I learned to live with it.
__________________
2007 S80 2.4 D5 (P3) - 110,000 miles 2008 V70 2.4 D5 (P3) - 163,000 miles |
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#3 |
Junior Member
Last Online: Jun 10th, 2024 16:53
Join Date: May 2012
Location: Essex/Suffolk
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But would the smoke coming from the swirl flap lever area indicate too much pressure?
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#4 |
Premier Member
Last Online: Yesterday 08:24
Join Date: Oct 2011
Location: Groningen
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Popping goes away if you repair leaks in the vacuum tract (engine mounts /egr bypassvalve with manual transmissions)
The popping noise is discharged air which is sucked in trough leaks , with perfect vacuum there is no air to pop in the valvecover ;-) https://www.youtube.com/watch?v=GsiMgQuITSI Last edited by 5cilinder; Feb 13th, 2024 at 11:46. |
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#5 |
Junior Member
Last Online: Jun 10th, 2024 16:53
Join Date: May 2012
Location: Essex/Suffolk
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It’s not too clear from that video what he’s doing. Presume removing the pipe from the vacuum pump to initiate the popping?
If I clamp the hose, it makes no difference. If I take the brake booster pipe off, the popping almost disappears. Brakes appear to be fine. |
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#6 | |
Premier Member
Last Online: Yesterday 08:24
Join Date: Oct 2011
Location: Groningen
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Then you have a tiny leak in the breakbooster,(separate bigger hose)so the vacuum pump can generate enough vacuum to let it function but the amount of removed air causes the popping sound |
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#7 |
Premier Member
Last Online: Yesterday 20:05
Join Date: Apr 2019
Location: Manchester
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No, there shouldn't be smoke coming from that area. As for the popping noise, I learned to live with it. I can only hear it when I take the oil cap off with the engine running. It doesn't affect the running of the car.
__________________
2007 S80 2.4 D5 (P3) - 110,000 miles 2008 V70 2.4 D5 (P3) - 163,000 miles |
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