Hi, I'm sorry if this is already somewhere written but I cant find. I have t6 2.0 btdi 204 engine 340 tkm, it goes to regen every 10 km, I have check and regen starts when soot is more than 30 and finishes when it is 9 but meausred soot comes again to 30 g in about 10 km, car consumes about 1 liter of oil in about 1200 kn, is this reasonwha it fills DPF or maybe something else. what should I measure to check problem. Thank you.
DPF regen every 10 km
- Thread starter Kresobuba
- Start date
Burning oil will creating soot which will block the DPF and EGR. It will also foul the injectors and cause incomplete combustion creating yet more soot.
Check you don’t have an external oil leak such as crankshaft seal failure.
A compression test will reveal any cylinder / piston damage, although unlikely it could be valve damage. A good mechanic will be able to determine between piston/ cylinder and valve damage by injecting a slug of oil into the cylinder to creat a temporary improvement in the piston / cylinder seal.
If the compression test is good it maybe a turbo seal passing oil. Check the induction after the turbo chargers (boost hose to charge air cooler) to see if it is very oily.
An engine oil analysis is well worth doing, not expensive and providing the input data (from you) is correct it will provide the tester with enough information to make an informed opinion on what is happening within the engine.
Frequent re-generations will no doubt causing diesel wash, damaging the bores / pistons and causing fuel dilution, another good reason for an oil analysis.
340K Km is not a concern as long as the engine has been serviced correctly, most important that the correct oil type is used though.
Check you don’t have an external oil leak such as crankshaft seal failure.
A compression test will reveal any cylinder / piston damage, although unlikely it could be valve damage. A good mechanic will be able to determine between piston/ cylinder and valve damage by injecting a slug of oil into the cylinder to creat a temporary improvement in the piston / cylinder seal.
If the compression test is good it maybe a turbo seal passing oil. Check the induction after the turbo chargers (boost hose to charge air cooler) to see if it is very oily.
An engine oil analysis is well worth doing, not expensive and providing the input data (from you) is correct it will provide the tester with enough information to make an informed opinion on what is happening within the engine.
Frequent re-generations will no doubt causing diesel wash, damaging the bores / pistons and causing fuel dilution, another good reason for an oil analysis.
340K Km is not a concern as long as the engine has been serviced correctly, most important that the correct oil type is used though.
Mine does the same as this, every 20 miles or so it'll do a regen, only very short because I guess it doesn't take much to clean the dpf from the burnt oil.
I've read this quite a few times with the 204, problem is finding a mechanic that's a) interested in doing this work and b) doesn't cost £100 an hour is hard around here.
I've read this quite a few times with the 204, problem is finding a mechanic that's a) interested in doing this work and b) doesn't cost £100 an hour is hard around here.
Can someone kindly give me a short explanation on regen please? I notice both my Passat and T6 Shuttle have the fan on once I turn the engine off and lock the vehicles, when walking away. Initially I assumed it was just a warm engine with the fan staying on to cool the engine, but now I wonder if it might be something else? Regen?? I assumed the engine would stay on, not just the fan.
Diesel particulate filters, all you need to know about DPFs | RAC Drive
Diesel particulate filters (DPFs) are a complex but necessary addition to modern diesels, but what are they, what do they do, and how do you maintain them?
You can tell it's doing a regen by the slightly raised revs at idle and the fan staying on for a bit when turning the car off.
In those situations, you will find that the regeneration has probably not been completed and will start again about 10 minutes into your next drive.
Hmm, I can't say I have noticed it whilst driving. Occasionally the Start-Stop won't happen when stationary but I put that down to it needing a charge.
I notice the fan stays on on e I have arrived at my destination (home say after a school run) and when I turn the engine off, the fan stays on for a period afterwards.
Thanks for the link, very informative
I notice the fan stays on on e I have arrived at my destination (home say after a school run) and when I turn the engine off, the fan stays on for a period afterwards.
Thanks for the link, very informative
VW's considers engine oil consumption above 0.5 litres/1000 km excessive.
I believe it's just a calculated value based on actual/metered air intake + EGR valve position + fuel injected (combustion expanding exhaust volume).
Are your values under no load conditions - van at standstill?
Anyways, found in my logs engine idling (830 rpm) "Exhaust gas jet volume in particle filter" approx. 80 m³/h when EGR is closed (position 0% = no recirculation).
Respectively EGR at position 31% the measurement value "Exhaust gas jet volume in particle filter" is approx. 31 m³/h.
At standstill on full throttle (2500 rpm) the measurement value "Exhaust gas jet volume in particle filter" was approx. 180 m³/h with EGR at 44%.
The above were recorded engine hot, intake air temperature +1°C
Respectively EGR at position 31% the measurement value "Exhaust gas jet volume in particle filter" is approx. 31 m³/h.
At standstill on full throttle (2500 rpm) the measurement value "Exhaust gas jet volume in particle filter" was approx. 180 m³/h with EGR at 44%.
The above were recorded engine hot, intake air temperature +1°C
[Log 2022-02-28-B]
To get better view I think relevant measurements would be the following - at standstill hot engine idling:
IDE07744 - Particle filter: air pressure sensor 1 bank 1: raw value
IDE00347 - Air mass: actual value
IDE07757 - Exhaust recirc.valve 1 bank 1: posit.feedback - Actual value
IDE04090 - Exhaust temperature bank 1 S1/S2/S3/S4
IDE00434 Particle filter: soot mass calculated
IDE00435 Particle filter: soot mass measured
IDE00436 Particle filter: kilometers since last regeneration
IDE01407 Particle filter: fuel consumption since last regeneration
IDE06059 Particulate filter: oil ash mass
Do you have VCDS?
Mine is currently doing regen very frequently since it’s last full service . It’s basically doing a regen every two days and it takes quite a long time .. it’s extremely annoying and it’s noticeable more frequent since the service . No difference in my driving patterns at all .the stench of it is also annoying as you can smell it in the van .
Similar threads
