Fan still on when engine is off
- Thread starter Sikhmans
- Start date
if its been running hot then this is normal, given the weather you would have had to be thrashing it.
on the other hand Lykaios makes a good point about DPF regeneration.
whats your typical journey and when was last time the car had a good long run?
if you don't know what regeneration is:
diesels now have a DPF (diesel particulate filter) these work by having in effect a blocked filter except for microscopic holes which air can pass but not diesel particulates.
the particulates build up in the filter, until the filter Is up to full operating termperature, at which point the particulates breakdown/burn off.
if you don't get the filter up to temperature often enough then the filter can become clogged and the car will alter the cycle to artificially increase the temperature in the exhaust and filter. some say they can feel the engine running a bit roughly when this happens.
on the other hand Lykaios makes a good point about DPF regeneration.
whats your typical journey and when was last time the car had a good long run?
if you don't know what regeneration is:
diesels now have a DPF (diesel particulate filter) these work by having in effect a blocked filter except for microscopic holes which air can pass but not diesel particulates.
the particulates build up in the filter, until the filter Is up to full operating termperature, at which point the particulates breakdown/burn off.
if you don't get the filter up to temperature often enough then the filter can become clogged and the car will alter the cycle to artificially increase the temperature in the exhaust and filter. some say they can feel the engine running a bit roughly when this happens.
Last edited:
I've had exactly the same, I do short journeys and it sounds like a plane engine when I get home but I do 200 miles and get home and it's dead silent. I have a 66 plate FR 184 so I'm reassured to see someone else with the same noise(it's my first diesel)
if the car is doing a DPF regen the fan will continue to run for around ten mins after switch off
its normal
its normal
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