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Volvo V70 2.0 D4204T 2010 - Blowing smoke back from round turbo #

Posted by Gerald Oliver on February 29, 2016, 9:28 pm

Year of Manufacture *: 2010
Engine Size and Code *: 2.0L L4 TD D4204T
( Optional ) Scanner Used: Snap-on Modis Ultra
( Optional) Fault Codes: No codes for engine

Hi all
We have a 2010 Volvo 2.0Litre diesel.
It came in with a brring noise.
There was no engine fault codes.
It is also blowing smoke out between Dpf and the turbo, the noise seems to be coming from the turbo actuator.
Was thinking that it might be a blocked Dpf.
The pressure sensor particulate trap is running between 0.02- 0.12 bar, also when I put my hand over the tail pipe it drops to 0.00bar also blow the smoke out near the turbo.
It also says Time elapsed since last regeneration trail (hours) Current: 43120.3 / Max: 43282.1 , I do not know what this means.
It also says Distance since last particulate trap regeneration (km) current: 570.5 , the thing is how do i know it did a full regen?
Thanks for any help in advance.
Gerald.

Re: Volvo V70 - blowing smoke back from round turbo

Posted by Tim Watts <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat3942' width='330' height='300' border=0 style='border:none;'> on March 1, 2016, 11:52 am, in reply to "Volvo V70 - blowing smoke back from round turbo"
Tim Watts

Are the pipes to the sensor reversed?
I would have said the pressure reading should rise when blocking the tail pipe.(bearing in mind it is a differential sensor not a pressure sensor)
Seen one off these with the pipes to sensor totally blocked.
Try a manual gauge at front sensor output or maybe try disconnecting DPF from front pipe.
I would concentrate on addressing the back pressure first, Then look for DPF codes second..

Re: Volvo V70 - blowing smoke back from round turbo

Posted by Gerald Oliver <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat3183' width='330' height='300' border=0 style='border:none;'> on March 1, 2016, 9:52 pm, in reply to "Re: Volvo V70 - blowing smoke back from round turbo"

The car was running fine.
The pressure readings drop when you block the tail pipe, but then blows the gas out one of the turbo seals, I have found on one of the volvo forums that when the Dpf blocks up it blows back out the turbo.
The sensors are wired like Lambda sensors with no pipes.
I don't know how to fit a manual gauge to it.
Also what would i prove by disconnecting the Dpf?
Thanks for your reply.

Volvo V70 - blowing smoke back from round turbo "Unresolved"

Posted by Gerald Oliver <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat3183' width='330' height='300' border=0 style='border:none;'> on March 5, 2016, 9:35 pm, in reply to "Re: Volvo V70 - blowing smoke back from round turbo"

Unresolved

Had it at Volvo this week to have DPF regen.
They said that would fix the problem.

It also has a burring noise from the vacum valve on the turbo.

Still blow smoke from round turbo seal on start up and on stoping the car.

Volvo also said the Dpf was a service item at 70.000 miles, this car has done 64150 miles.

I know this may be a silly thing to ask is there any way of testing the Dpf if i take it of, or should i just fit a new one?

Thanks for your help.

Re: Volvo V70 - blowing smoke back from round turbo "Unresolved"

Posted by aidan birley <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2879' width='330' height='300' border=0 style='border:none;'> on March 6, 2016, 10:49 am, in reply to " Volvo V70 - blowing smoke back from round turbo "Unresolved""
Aidan Birley

Hi

Cant help directly with the problem, but would be reluctant to bolt a new DPF on without finding a definite cause.

In my limited experience Volvos are very good as regards DPF. i.e I have never seen a DPF fail and have a few with over 150000 miles on them.

Aidan

Re: Volvo V70 - blowing smoke back from round turbo "Unresolved"

Posted by Tim Watts <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat3942' width='330' height='300' border=0 style='border:none;'> on March 6, 2016, 3:43 pm, in reply to "Re: Volvo V70 - blowing smoke back from round turbo "Unresolved""
Tim Watts

You didn't say how the car drives, Is it down on performance.
If its really sluggish then the DPF can be removed or disconnected and road tested. Any major improvement would indicate blockage, Not necessarily DPF as could also be blocked silencer.
If the drive-ability is still fair I would be looking at worn or cracked turbo
Is it possible to remove pressure sensor pre DPF and make an adapter to get a back pressure reading.

Re: Volvo V70 - blowing smoke back from round turbo "Unresolved"

Posted by Gerald Oliver <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat3183' width='330' height='300' border=0 style='border:none;'> on March 6, 2016, 7:24 pm, in reply to "Re: Volvo V70 - blowing smoke back from round turbo "Unresolved""

Hi Tim.

The car drives ok.
Does not drive down on performance.
We don't think we could drive it after disconnecting the DPF because it has pressure sensors in it.
Also what would you read the pressure with?
Many thanks in advance

Re: Volvo V70 - blowing smoke back from round turbo "Unresolved"

Posted by Tim Watts <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat3942' width='330' height='300' border=0 style='border:none;'> on March 7, 2016, 11:15 am, in reply to "Re: Volvo V70 - blowing smoke back from round turbo "Unresolved""
Tim Watts

Looks like the readings you are getting and no codes are true.
Think its turbo off time.
Had similar on other cars when manifold distorted causing blow past at gaskets or split in front pipe.
Also had pre cat break up which turned 90* causing similar issues

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