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2008 V50 2.0d - Blue Smoke :(

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Old Dec 9th, 2019, 08:27   #1
cwhaley
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Default 2008 V50 2.0d - Blue Smoke :(

Hi all. I'm struggling with a problem on my 2008 2.0d.

Does anybody know potential causes of the following symptoms?

- Excessive cranking when starting cold
- Large amount of light blue smoke for around 20-30 seconds after starting
- Rough idle which clears after 2 minutes

So far I have had the below work carried out:

- New heater plugs
- New injectors
- Battery tested
- Full service including fuel filter

This work has killed my wallet and the problem still remains!
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Old Dec 10th, 2019, 15:27   #2
brutusmotorsport
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Default smoke

blue smoke is oil. more than likely its little sitting in the turbo. and burns out after few seconds or short drive down the road.
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Old Dec 11th, 2019, 08:53   #3
cwhaley
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Originally Posted by brutusmotorsport View Post
blue smoke is oil. more than likely its little sitting in the turbo. and burns out after few seconds or short drive down the road.
I did find a fine misting of oil in the intercooler pipe, is this normal? Just wondering why it would result in the rough start.
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Old Dec 11th, 2019, 11:11   #4
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It is perfectly normal for oil mist to be carried over past the turbo and into the inlet track, what you don't want though is a lot of oil......a diesel engine will self destruct (run away) if it has a decent supply of oil to feed off - which is why I don't think yours is burning oil on cold start.

A blueish smoke can also be a diesel fueling issue on cold start, aren't new injectors supposed to be calibrated with the ECU etc ??
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Old Dec 11th, 2019, 11:31   #5
cwhaley
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Originally Posted by Welton View Post
It is perfectly normal for oil mist to be carried over past the turbo and into the inlet track, what you don't want though is a lot of oil......a diesel engine will self destruct (run away) if it has a decent supply of oil to feed off - which is why I don't think yours is burning oil on cold start.

A blueish smoke can also be a diesel fueling issue on cold start, aren't new injectors supposed to be calibrated with the ECU etc ??
The pipe was slightly loose where it joined the air intake, so in removing and refitting I noticed a light coating of oil inside -- certainly nothing major.

The car runs absolute fine when warm and really is a pleasure to drive. Fuel economy not too great (reporting 30mpg) but that's probably down to my commute, otherwise I enjoy it.

The new injectors were fitted by an established diesel specialist and there's no codes being thrown for them. I've started going back to basics with it now -- going to test the battery myself at the weekend, plus leaving the MAF sensor unplugged, cleaning the EGR valve and also testing the current to the glow plugs.

The only thing I haven't mentioned is the fact that the previous owner mapped out the DPF and had the filter removed from inside. Not sure this would cause my issue though?
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Old Dec 11th, 2019, 11:32   #6
Clan
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Quote:
Originally Posted by cwhaley View Post
Hi all. I'm struggling with a problem on my 2008 2.0d.

Does anybody know potential causes of the following symptoms?

- Excessive cranking when starting cold
- Large amount of light blue smoke for around 20-30 seconds after starting
- Rough idle which clears after 2 minutes

So far I have had the below work carried out:

- New heater plugs
- New injectors
- Battery tested
- Full service including fuel filter

This work has killed my wallet and the problem still remains!
are you sure the plastic throttle flap is not sticking closed for the first few seconds after starting ?
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Old Dec 11th, 2019, 11:39   #7
cwhaley
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are you sure the plastic throttle flap is not sticking closed for the first few seconds after starting ?
I've not checked it and neither have the garages (they only seem to be guided by the code readings!)

Where is the flap on the 2.0? My engine is very similar to the below (not my picture):


Last edited by cwhaley; Dec 11th, 2019 at 11:42.
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Old Dec 11th, 2019, 11:52   #8
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I've not checked it and neither have the garages (they only seem to be guided by the code readings!)

Where is the flap on the 2.0? My engine is very similar to the below (not my picture):

You have the double throttle on that system there is a vacuum servo on each one you can see there ... These are not prone to sticking like the single throttle version ... but you never know ! the symptoms fit ..
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Old Dec 11th, 2019, 11:59   #9
cwhaley
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You have the double throttle on that system there is a vacuum servo on each one you can see there ... These are not prone to sticking like the single throttle version ... but you never know ! the symptoms fit ..
Would that be the item just up from the jubilee clip on both pipes?

During an inspection of my own I found the end of the left pipe to be snarled up with lots of perished rubber and it was also poorly connected. I removed the perished rubber, pushed the pipe further up and refitted. I bought a replacement silicone pipe but can see it's a pig of a job to replace, so not got around to it yet.

I'll add removing the throttle body to the list of the jobs and taking a look inside.Guess I'm looking for a circular flap stuck in the closed position?
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Old Dec 11th, 2019, 12:41   #10
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Originally Posted by cwhaley View Post
Would that be the item just up from the jubilee clip on both pipes?

During an inspection of my own I found the end of the left pipe to be snarled up with lots of perished rubber and it was also poorly connected. I removed the perished rubber, pushed the pipe further up and refitted. I bought a replacement silicone pipe but can see it's a pig of a job to replace, so not got around to it yet.

I'll add removing the throttle body to the list of the jobs and taking a look inside.Guess I'm looking for a circular flap stuck in the closed position?
yes there is a circular flap in each pipe press them closed hard against the spring and see if there is any tendency to stick shut...
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