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2011 Polo 6R Bluemotion 1.2 TDI smoking
Posted: Tue Oct 11, 2022 11:36 am
by POLOZ
Hi All,
I recently restored a CAT N Polo 6R 1.2TDI and can't understand the following
1. On cold start, it hesitates a little to start and when it fires up a cloud of white smoke is emitted which clears off immediately.
2. On full throttle and specially in third gear I can see cloud of black smoke in the back which seems to get better if I use additive like Diesel cleaner etc but has come back again.
'Cloud of white smoke' on cold start is scaring me
. Quick google seems to bring up that it may be related to fuel leaking into the exhaust system or a turbo nearing end of life
The white smoke smells like fuel.
What do you reckon?
Also to add it's been fully serviced and recently had Water pump and Cambelt replacemed.
Re: 2011 Polo 6R Bluemotion 1.2 TDI smoking
Posted: Tue Oct 11, 2022 1:26 pm
by iichel
Injectors or EGR valve might be bad.
Re: 2011 Polo 6R Bluemotion 1.2 TDI smoking
Posted: Tue Oct 11, 2022 4:05 pm
by POLOZ
iichel wrote: Tue Oct 11, 2022 1:26 pm
Injectors or EGR valve might be bad.
Worth cleaning the EGR?
Re: 2011 Polo 6R Bluemotion 1.2 TDI smoking
Posted: Tue Oct 11, 2022 5:20 pm
by iichel
Depends on the condition. Usually it's already gone when it smokes badly. Sometimes you might be lucky.
Re: 2011 Polo 6R Bluemotion 1.2 TDI smoking
Posted: Wed Oct 12, 2022 12:26 pm
by POLOZ
iichel wrote: Tue Oct 11, 2022 5:20 pm
Depends on the condition. Usually it's already gone when it smokes badly. Sometimes you might be lucky.
Is it worth using the Injector cleaners to see if it makes an difference?
Re: 2011 Polo 6R Bluemotion 1.2 TDI smoking
Posted: Wed Oct 12, 2022 12:56 pm
by amer6R
Do you have any hissing noises under accelerations?
Re: 2011 Polo 6R Bluemotion 1.2 TDI smoking
Posted: Wed Oct 12, 2022 3:02 pm
by POLOZ
amer6R wrote: Wed Oct 12, 2022 12:56 pm
Do you have any hissing noises under accelerations?
I hear more of a whining sound
Re: 2011 Polo 6R Bluemotion 1.2 TDI smoking
Posted: Thu Oct 13, 2022 6:55 am
by amer6R
POLOZ wrote: Wed Oct 12, 2022 3:02 pm
amer6R wrote: Wed Oct 12, 2022 12:56 pm
Do you have any hissing noises under accelerations?
I hear more of a whining sound
if its like a siren then turbo is on its way out
Re: 2011 Polo 6R Bluemotion 1.2 TDI smoking
Posted: Thu Oct 13, 2022 10:02 am
by POLOZ
amer6R wrote: Thu Oct 13, 2022 6:55 am
POLOZ wrote: Wed Oct 12, 2022 3:02 pm
amer6R wrote: Wed Oct 12, 2022 12:56 pm
Do you have any hissing noises under accelerations?
I hear more of a whining sound
if its like a siren then turbo is on its way out
Oh no defo not like Siren.
Re: 2011 Polo 6R Bluemotion 1.2 TDI smoking
Posted: Thu Oct 13, 2022 2:57 pm
by POLOZ
How difficult is to remove the EGR valve? Do I need to dismount the exhaust from turbo?
Re: 2011 Polo 6R Bluemotion 1.2 TDI smoking
Posted: Thu Oct 13, 2022 3:44 pm
by iichel
Yes it's quite labour intensive. Either remove the DPF/turbocharger or remove the drive shaft. In the workshop it's about 4-5 hours of labour with experience and specialist tools.
If you could remove the injectors and get them tested, that would probably be the easiest way to start.
If you mount them back, you do have to renew copper seals, injector bolts and O-rings.