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Smoking V50 diesel

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Old Jan 24th, 2019, 22:05   #1
Big feller
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Last Online: May 20th, 2019 19:04
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Default Smoking V50 diesel

Our V50 2.0l diesel has been playing up over the last couple of years. I hope this will help anyone with similar problems.

The car drove well on short journeys but the long journeys that would normally be expected to clear the DPF seemed to do the opposite.

Driving at night we could see a fair bit of smoke in the rear view mirror when accelerating. Particularly noticeable on the motorway.

It went into the dealer for forced regeneration on a couple of occasions. Better for a while and then back to its old tricks.

Recently got a load worse. Back to the dealer and asked them to have a better look. They advised replacement EGR valve, DPF and exhaust gas sensor. I got this done and things were better for a very short while. Then I suffered kangarooing at low speed and massive drop in power. On the way back to the dealer it got really bad and I heard blowing from the exhaust. This was diagnosed as a written off catalytic converter and the brand new DPF was blocked beyond repair.

The previous work had been done by an independent as the dealer prices were ludicrous. Dealer price for new cat was something like 800 + labour. Aftermarket unit was fitted for less than 150 + labour. Also another new DPF.

At this stage I was worried that all the new stuff was likely to be written off again as I wasn't sure the original problem had been sorted. Independent garage suggested turbo was now about the only probable cause.

Reluctantly, I decided to replace the turbo. Found a replacement balanced cassette - turbo innards for about 130, but the bolts on the turbo were so badly seized that garage suggested new unit. Inspection of old turbo showed that it had a fair bit of wear and was likely to be throwing oil at the DPF / CAT.

Lesson to be learned - If your diesel has similar symptoms it may be worth investigating the turbo first to save writing off DPF and CAT.
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Old Jan 24th, 2019, 22:39   #2
zork
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Thank you for sharing... Good to know...
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Old Mar 5th, 2019, 21:15   #3
Big feller
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Default Update

Immediately after fitting the new DPF and catalytic converter along with a new turbo the car drove beautifully for about 50 miles before getting progressively worse and exhibiting all the symptoms of a blocked DPF. Totally undriveable after about 80 miles.

Having eliminated pretty much all other possibilities including leaks in the induction tubing I decided to check the injectors. On my V40 I had the injectors ultrasonically cleaned and back flushed. Sadly this seemed not to be an option on the V50 with the Siemens injectors.

Peter Strong near Reading charged 15 per injector to test them and did so very quickly. It was about an hour's labour to remove.

All four were well out of spec so a new set was ordered for 180 + VAT each.

New injectors fitted and the DPF regenerated. The car fired up happily and idled smoothly. Out on the dual carriageway there were a couple of puffs of smoke but then it settled down and pulled smoothly.

Fingers crossed we have now sorted what the Volvo dealer missed entirely.

To sum up, if you have any symptoms similar to my description above I recommend starting off by getting the injectors tested. Assuming we really have found the fault this time, for an hour's labour and 60 I could have saved myself a couple of thousand pounds and a whole lot of grief.

Will do my best to report back when I have put some miles on.
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Old Apr 1st, 2019, 18:47   #4
Big feller
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Default Good so far

Having done a few hundred miles since the new injectors were fitted all is looking good. A trip up the motorway at between 65 and 70 MPH with no heavy acceleration averaged 49 MPG. Definitely looking as though the injectors were the cause of trouble from the start.
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Old Apr 3rd, 2019, 14:07   #5
richard
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1.6 or 2.0d?
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Old Apr 3rd, 2019, 18:09   #6
MDS40
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Wink

Our V50 2.0l diesel has been playing up over the last couple of years.
__________________
2006 S40 2.4 SE Auto. Ruby Red. 83K Miles

Some previous cars include: Jaguar x type: Mazda 6 : Mazda 626: Ford Sierra 2.0: Toyota Celica ST 1600 : Hillman Avenger: Triumph Spitfire:
Oh and a Volvo 340 GL 1984 company car from new.
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Old Apr 5th, 2019, 09:09   #7
Big feller
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It's a 2.0l. No additive required
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