RE: 140TDI DPF with Adblue

[sclyde2]

I would not recommend you interrupt a regen. I have been caught close to home few fimes, as it may sound crazy, continue to drive until finished. Do an extra lap.

The danger of interrupting regens, you could end up with oil thinning (fuel enters oil). Causes an increase in oil levels plus oil loses its lubrication. Very bad for engine. If you have a habit of turning off your engine with regen in process , check your oil level. Plus, can clog the dpf over time if regens are not completed. Be careful with that.

2015 Tiguan 130TDI R-Line, Pepper Grey, Panoramic Sunroof

Interesting. This potential issue applies to the ea288? Do you have a link to some instances where these problems occurred. I often get home not even noticing the Regen is happening until I switch the engine off and hear the fan. From what you describe, VW has designed it in a way that will be difficult for me to avoid issues.

[dinot81]

Interesting. This potential issue applies to the ea288? Do you have a link to some instances where these problems occurred. I often get home not even noticing the Regen is happening until I switch the engine off and hear the fan. From what you describe, VW has designed it in a way that will be difficult for me to avoid issues.

If you are referring to oil thinning, this applies to all manufacturers with dpf engines. If they are not maintained, has caused issues all over the world from Audi to Volvo. Have read stories in Germany where engines have been destroyed with less then 10,000kms on the clock as people were not made aware on how to maintain a diesel with dpf. Most of them did shorter trips not allowing oil to reach operating temeperature. In those cases if a regen is required with a cold engine, it will inject additional fuel into combustion chamber to raise the temeperature (most cars need a minimum of 600 degrees C. If you reach your destination and interrupt that process, due to cylinder walls not being at operating temp, the additional unburnt fuel stays on the walls without being able to evaporate (low temp in chamber) and on the next start, oil will pick it up and you end up with oil thinning over time if repeated all the time. Its visible by increase of oil on dipstick. Looks like your engine producing oil. So, if that level goes beyond limits, can end up in the turbo and once the mixture reaches combustion chamber, engine commits suicide by revving itself to death. Imagine a diesel engine revving way past the limiter and cannot be shut down even if you turn off the key. Those unlucky ones are still in battle through Courts as has voided warranty and were never explained about issues by sales people. The manual says not to use for constant short distance driving and if so, engine will need higher speed driving from time to time.

In terms of regens, I can only say about mine that exhaust note is louder and idles at 1000rpm when in coasting mode or I happen to be at the lights. Have not driven another dpf diesel long enough to be present during a regen.

Another thing you can have a look if your service interval, they start with 365 / 730 days and 15k & 30k kms. If the inspection reminder reduces the days, not exactly following the oil change interval, car is picking up that not being driven ideally.

Hope above makes sense, sorry about if any typos, wrote on my phone. Above info obtained from German forums and stories when researched dpf problems people had.

2015 Tiguan 130TDI R-Line, Pepper Grey, Panoramic Sunroof