Q: DPF (Diesel Particulate Filter) melted

asked by on

Hello. The DPF itself (metal) has melted and caused the DPF to block my BMW 118d. I have bought a new DPF but before fitting it in I need to find the cause for the old one melting as I don't want the same to happen to the new one. Would you know why the DPF itself melted?

My car has 92000 miles.
My car has a manual transmission.

Hello. The DPF functions by trapping certain diesel particulates, and periodically goes through a regenerative cycle to burn those particulates (i.e. when you’re on the motorway and get the temperature high enough to regenerate). This is a bit speculative, but perhaps the regenerative phase was not initiated often enough to keep the particulates burned off and too much particulate material accumulated. A regeneration could have occurred that was excessive, creating enough heat to cause the melting you describe. This might occur if you have a high percentage of low-speed or stop and go driving, with few motorway driving segments. I would make sure I was getting regular higher-speed segments of 10 miles/15 kilometers or more on a weekly basis to prevent this accumulation. If you need to have this scoped out by a professional, have a qualified technician inspect the system thoroughly and advise you on the best actions to take at this point.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. DPF (Diesel Particulate Filter) melted

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Car stalls after overheating.

Hi there. Your engine can overheat for any number of reasons. If it is overheating only in stop and go driving and not on the highway then you may have a radiator issue or a cooling fan problem. If it...

Q: Instrument cluster shuts off intermittently while driving

There are two fuse boxes on the vehicle. One is inside of the firewall usually located in or around the dashboard. Have you checked this fuse box and the fuse box in the engine compartment? The dash cluster itself may...

Q: My air vents sometimes stop working.

Hi there. Anytime something is not functioning all the time and is randomly shutting off, then there is an issue with the relay of that circuit. Check the relay to the fan motor circuit and see if there is power...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.