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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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Vacuum Problem?Views : 1081 Replies : 5Users Viewing This Thread : |
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Dec 12th, 2021, 12:56 | #1 |
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Last Online: Jul 14th, 2023 06:42
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Vacuum Problem?
Hi,
I have posted this on a XC70 specific forum, but thought I might try to widen my search. I have a strange noise from my 2011 D5 in my XC70 and I suspected it was a vacuum issue. I removed the pump and replaced the seals but it is still the same. With the brake booster pipe disconnected from the vacuum pump and the hole blocked I get a steady strong vacuum reading, but with the pipe connected, the vacuum meter needle flicker's So indicating a fault in the booster or pipework in that direction. On the other hand, the popping/rattling noise is strong when the hole is blocked with the steady vacuum, and vanishes with the brake vacuum line removed from the vacuum pump. Is anyone able to suggest what is going on? The two scenarios seem contradictory. Link to how it sounds: [YOUTUBE]https://www.youtube.com/watch?v=deql5fLjHXY[/YOUTUBE] Cab anyone suggest what it might be? Thanks, Tim. |
Jan 15th, 2022, 22:26 | #3 |
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I have a similar issue on my D3, where is the nipple located? And did the nipple help any other than sound?
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Jan 16th, 2022, 10:46 | #4 |
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Last Online: Feb 28th, 2023 20:25
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Second request for "nipple" location. I have a D5 XC90 and have the noise associated with vacuum issue, but no noticeable vacuum issue. Be nice to resolve this.
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2003 V70 2.4SE Auto. Gone now. 2003 XC90 D5. Auto. |
Jan 18th, 2022, 10:32 | #5 | |
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Location: Cardiff
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Quote:
I have the popping sound if I open the oil fill cap. I have vacuum tested both of the mounts, all the pipe work from the vacuum pump to the mounts and the pump itself (engine off) so I'm wondering if the leak is on something else the vacuum pump feeds? does the vacuum system run anything other than the mounts and brake system? (mine is 2014 so the turbo system is not affected by vacuum)
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Current Volvo: XC90 D5 2014 120K miles. Running lovely on clean green Biodiesel Previous volvo: V70 D5 2009 - T5 convertible - V40 1.8 - 343GL - the one with the elastic band transmission! |
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Jan 18th, 2022, 19:20 | #6 | |
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Quote:
Its located under the egr cooler |
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