Blue smoke

dotsie · 14th June 2018, 14:58

Hi all, need some help please.
My CDT is a little smokey on starting and accelerating. It also smells acrid. Did a leak back test which is inconclusive. I have a
Pierburg UB pump which is gurgling and noisy. Would the UB pump cause the smoke?. She runs and starts fine and only cut out when the tank went below 1/4 full.

RoverP480 · 14th June 2018, 15:00

Blue smoke tends to be oil, has the engine breather been serviced at all?

dotsie · 14th June 2018, 15:04

Hi yes. it was replaced. No oil coming from dipstick. Oil was half full and thats strange. what could cause that?

RoverP480 · 14th June 2018, 15:08

If its burning oil the level will drop. In general terms could be valve seals or turbo seal but I am not too knowledgeable with the rest of the engine, as I had no issues with mine!

Eddy600 · 14th June 2018, 16:06

Could be the intercooler o rings replace with viton ones and see if that improves it.

dotsie · 14th June 2018, 16:20

Would that not be the cause of black smoke? Still a cheap elimination I guess. So its nothing to do with pump and injectors. Mechanic wanted to replace both pumps and send off injectors for testing etc...£650 without being sure it would solve the problem!

Saga Lout · 14th June 2018, 17:31

If it smokes at all it will fail the MOT now, any visible smoke of any colour is a fail.

Eddy600 · 14th June 2018, 18:16

Quote:

Originally Posted by dotsie

Would that not be the cause of black smoke? Still a cheap elimination I guess. So its nothing to do with pump and injectors. Mechanic wanted to replace both pumps and send off injectors for testing etc...£650 without being sure it would solve the problem!

Would be a cheap fix if it was the o rings, wouldn't of thought pump or injectors failing that could be the turbo seals letting oil in not had to mess with a turbo on these so unknown territory.

Mike Trident · 14th June 2018, 18:58

Quote:

Originally Posted by Saga Lout

If it smokes at all it will fail the MOT now, any visible smoke of any colour is a fail.

I believe that rule is just for cars fitted with a DPF

Mike Noc · 14th June 2018, 19:05

Acrid smelling smoke can be unburnt diesel. Try adding a dose of injector cleaner to the tank - Forte comes well recommended.

14th June 2018, 14:58	#1
dotsie Avid contributor 2 x rover 75 cdt Join Date: Apr 2012 Location: enniskillen Posts: 159 Thanks: 8 Thanked 4 Times in 4 Posts	Blue smoke Hi all, need some help please. My CDT is a little smokey on starting and accelerating. It also smells acrid. Did a leak back test which is inconclusive. I have a Pierburg UB pump which is gurgling and noisy. Would the UB pump cause the smoke?. She runs and starts fine and only cut out when the tank went below 1/4 full.

14th June 2018, 17:31	#7
Saga Lout This is my second home MG ZT and Rover 75, Join Date: Jul 2013 Location: Wigan Posts: 3,276 Thanks: 2,556 Thanked 2,685 Times in 1,037 Posts	But... If it smokes at all it will fail the MOT now, any visible smoke of any colour is a fail.

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14th June 2018, 15:00	#2
RoverP480 Gets stuck in None at the moment Join Date: Jan 2018 Location: Hereford Posts: 501 Thanks: 1 Thanked 165 Times in 146 Posts	Blue smoke tends to be oil, has the engine breather been serviced at all?

14th June 2018, 15:04	#3
dotsie Avid contributor 2 x rover 75 cdt Join Date: Apr 2012 Location: enniskillen Posts: 159 Thanks: 8 Thanked 4 Times in 4 Posts	Hi yes. it was replaced. No oil coming from dipstick. Oil was half full and thats strange. what could cause that?

14th June 2018, 15:08	#4
RoverP480 Gets stuck in None at the moment Join Date: Jan 2018 Location: Hereford Posts: 501 Thanks: 1 Thanked 165 Times in 146 Posts	If its burning oil the level will drop. In general terms could be valve seals or turbo seal but I am not too knowledgeable with the rest of the engine, as I had no issues with mine!

14th June 2018, 16:06	#5
Eddy600 Loves to post Rover, MG Join Date: Jul 2016 Location: Halifax Posts: 275 Thanks: 19 Thanked 77 Times in 61 Posts	Could be the intercooler o rings replace with viton ones and see if that improves it.

14th June 2018, 16:20	#6
dotsie Avid contributor 2 x rover 75 cdt Join Date: Apr 2012 Location: enniskillen Posts: 159 Thanks: 8 Thanked 4 Times in 4 Posts	Would that not be the cause of black smoke? Still a cheap elimination I guess. So its nothing to do with pump and injectors. Mechanic wanted to replace both pumps and send off injectors for testing etc...£650 without being sure it would solve the problem!

14th June 2018, 19:05	#10
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Acrid smelling smoke can be unburnt diesel. Try adding a dose of injector cleaner to the tank - Forte comes well recommended.