D5 (D5244T to 2005) - Black smoke from exhaust

Flatsnout2 · Jun 7th, 2010, 20:29

Have a '51 D5, that goes a treat. Its now done 165000, recently on accel when the turbo is winding up , it sounds like theres an air leak from under the car, at 3000 rpm a thunmping sound starts and the peformanxce tails off. I was at the lights the other night and a taxi pulled up, I noticed black somke and pointed at his car he leaned out of window and said it was from mine -doh !! Pulled over nad sure enough thick black smoke on accel. I have a feeling its coming from the turbo, the sound from under the car on accel sounds like bearing whine ? Has anybody had carbon build up blocking the return/feed lnes to the turbo ?

Breva · Jun 7th, 2010, 20:37

Black Smoke on Diesels is usually over fuelling. I`d check for an air leak after the air flow meter for a start.

Flatsnout2 · Jun 7th, 2010, 22:03

Quote:

Originally Posted by fletchv70rawd

Black Smoke on Diesels is usually over fuelling. I`d check for an air leak after the air flow meter for a start.

Thanks for that, I did think white for oil, black for fuel but started thinking gotta be turbo. The air is like a dumping sound, that also sounds abit like bearing going !

Its in the garage tomoz, after limping there, so hoopefully won't be too expensive.

Cheers dude

Lancee · Jun 8th, 2010, 10:07

Favourite for the black smoke is a blown intercooler (check for oil under radiator area) or leaking associated pipework.
The thumping sound at 3000 rpm followed by limp mode sounds very much like the turbo inlet tube collapsing with the suction, the rubber goes soft with age, replacement part around £55 from Volvo only.
I would also suggest cleaning the EGR pipework, there are threads on here regarding this.

Flatsnout2 · Jun 8th, 2010, 20:43

Quote:

Originally Posted by Lancee

Favourite for the black smoke is a blown intercooler (check for oil under radiator area) or leaking associated pipework.
The thumping sound at 3000 rpm followed by limp mode sounds very much like the turbo inlet tube collapsing with the suction, the rubber goes soft with age, replacement part around £55 from Volvo only.
I would also suggest cleaning the EGR pipework, there are threads on here regarding this.

Turns out one of the turbo air pipes had split, so pleased the turbo's not ko'd !!

Lancee · Jun 8th, 2010, 23:07

Sweet news.

Jun 7th, 2010, 20:29	#1
Flatsnout2 Junior Member Last Online: May 2nd, 2011 01:04 Join Date: Jun 2010 Location: newcastle	Black smoke from exhaust Have a '51 D5, that goes a treat. Its now done 165000, recently on accel when the turbo is winding up , it sounds like theres an air leak from under the car, at 3000 rpm a thunmping sound starts and the peformanxce tails off. I was at the lights the other night and a taxi pulled up, I noticed black somke and pointed at his car he leaned out of window and said it was from mine -doh !! Pulled over nad sure enough thick black smoke on accel. I have a feeling its coming from the turbo, the sound from under the car on accel sounds like bearing whine ? Has anybody had carbon build up blocking the return/feed lnes to the turbo ?

Jun 7th, 2010, 20:37	#2
Breva Member Last Online: Jun 2nd, 2016 11:26 Join Date: Feb 2007 Location: Work	Black Smoke on Diesels is usually over fuelling. I`d check for an air leak after the air flow meter for a start.

Jun 8th, 2010, 10:07	#4
Lancee Premier Member Last Online: Today 00:54 Join Date: Jun 2009 Location: Devon	Favourite for the black smoke is a blown intercooler (check for oil under radiator area) or leaking associated pipework. The thumping sound at 3000 rpm followed by limp mode sounds very much like the turbo inlet tube collapsing with the suction, the rubber goes soft with age, replacement part around £55 from Volvo only. I would also suggest cleaning the EGR pipework, there are threads on here regarding this.

Jun 8th, 2010, 23:07	#6
Lancee Premier Member Last Online: Today 00:54 Join Date: Jun 2009 Location: Devon	Sweet news.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)