D5 Gray smoke on acceleration

kos99 · Nov 25th, 2019, 19:42

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

S60D5-185 · Nov 25th, 2019, 19:45

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?

kos99 · Nov 25th, 2019, 19:52

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.

Nov 25th, 2019, 19:42	#1
kos99 New Member Last Online: Nov 25th, 2019 21:53 Join Date: Jul 2017 Location: Haslington	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
S60D5-185 Me ? Surely Not! Last Online: Apr 5th, 2024 16:23 Join Date: Jul 2010 Location: 2007 Volvo XC90 D5 Geartronic. South of Hadrians Wall.	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? __________________ “Do the right thing. It will gratify some people and astonish the rest.” – Mark Twain 😊 2007 Volvo XC90 D5 SE Geartronic

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Nov 25th, 2019, 19:52	#3
kos99 New Member Last Online: Nov 25th, 2019 21:53 Join Date: Jul 2017 Location: Haslington	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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