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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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D5 Gray smoke on accelerationViews : 565 Replies : 2Users Viewing This Thread : |
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Nov 25th, 2019, 19:42 | #1 |
New Member
Last Online: Nov 25th, 2019 21:53
Join Date: Jul 2017
Location: Haslington
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D5 Gray smoke on acceleration
Hi everyone,
I have an 04 D5 xc90 and it has starred to blow grey smoke when hard accelerating but seems to be fine if I drive very gently also when pulling away from a junction i get a puff of black smoke. Looking in to it i have found it looks like I have a vacuum leak. It has the very load knocking sound when the the oil cap is taken off but if i kink the pipe going to the engine mounts the sound goes away. I was wondering would a vacuum leak case the grey smoke as i understand it also controls the turbo veins? Thanks Alex |
Nov 25th, 2019, 19:45 | #2 |
Me ? Surely Not!
Last Online: Apr 5th, 2024 16:23
Join Date: Jul 2010
Location: 2007 Volvo XC90 D5 Geartronic. South of Hadrians Wall.
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Personally I think that you may have a boost leak caused by either a failing intercooler or the associated charge pipes.
Check these out. Any signs of drips of oil under the radiator area? Is the performance still strong?
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“Do the right thing. It will gratify some people and astonish the rest.” – Mark Twain 😊 2007 Volvo XC90 D5 SE Geartronic |
Nov 25th, 2019, 19:52 | #3 |
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Last Online: Nov 25th, 2019 21:53
Join Date: Jul 2017
Location: Haslington
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That is what i thought first i can not see any oil under the radiator but i can have a look again tomorrow but i have noticed oil on the drivers side of the slam plate but it that does not seam to be getting any worse and has been there for ages.
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