White Smoke (again)
Discussion
Hi All,
I had lots of white smoke coming out of my 2.0l tdi a4 recently. Noticed the coolant level was looking low, so worried it was the head gasket going, so topped up the coolant and took it to the garage. They ran tests on her and said the head gasket was fine, and since I've topped up the coolant level, there's been no smoke..
Until tonight.
It started suddenly when I revved the engine doing a 3 point turn, then continued all the way home.
When we got back, I checked the coolant level which is now actually just above MAX.
The radiator fan kept running after the engine was off for about 10 minutes (although the temp gauge on the way home was normal).
Thoughts?!
I had lots of white smoke coming out of my 2.0l tdi a4 recently. Noticed the coolant level was looking low, so worried it was the head gasket going, so topped up the coolant and took it to the garage. They ran tests on her and said the head gasket was fine, and since I've topped up the coolant level, there's been no smoke..
Until tonight.
It started suddenly when I revved the engine doing a 3 point turn, then continued all the way home.
When we got back, I checked the coolant level which is now actually just above MAX.
The radiator fan kept running after the engine was off for about 10 minutes (although the temp gauge on the way home was normal).
Thoughts?!
Could it have been doing a regeneration?
Fans staying on after engine shut off could indicate this. Usually regens aren't noticed as it occurs at steady speeds (like motorway), however if it had got to the point it had to do one regardless, it has to artificially raise exhaust gas temps.
What kind of journeys does the car do? Might be worth taking it for a decent run on the motorway.
Fans staying on after engine shut off could indicate this. Usually regens aren't noticed as it occurs at steady speeds (like motorway), however if it had got to the point it had to do one regardless, it has to artificially raise exhaust gas temps.
What kind of journeys does the car do? Might be worth taking it for a decent run on the motorway.
Unfortunately those are not ideal conditions for a car with a DPF.
It's not to say the car shouldn't be doing them, but it needs a good run on the motorway once a week (rough estimate) for the DPF to regenerate properly.
Surely if you were buying a car primarily for short trips then a petrol would have been a better bet.
It's not to say the car shouldn't be doing them, but it needs a good run on the motorway once a week (rough estimate) for the DPF to regenerate properly.
Surely if you were buying a car primarily for short trips then a petrol would have been a better bet.
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