DPF Troubles - break, sell or fix?
Discussion
eltax91 said:
Yeah it's a massive shame. If only I'd have researched into DPF's first! I just cannot have an unreliable car, my work depends on it. My previous Octavia was faultless, so I'm just hoping this new one will be too.
I dont see how this DPF issue is making your car unreliable? Does it stop it working?RobCrezz said:
I dont see how this DPF issue is making your car unreliable? Does it stop it working?
Yes and no. Limp mode, whilst still driveable is a pain in the arse. Also, the fuel economy drops by around 20% when the DPF is clogged up. It's the time spent troubleshooting which hurts me. Lots of time messing with fault codes and doing a regen/ racalibration. Also, Mazda say the oil should be changed at each DPF regen (although my local guy is not doing so) because it's a "wet system", so unburt diesel is returned to the sump when the DPF fails to regen.There seems little other option when it can't be bypassed and a replacement costs such a fortune. What the hell is in these things to cost so much I don't know. all I hear is "precious metals" when I ask.
All-in-all, the time its spent in the garage reminded my boss to have a chat with me about the fact he pays me a car allowance to have a reliable car... hence i've gone out and bought one.
Stuart J said:
Ive heard rumour that visual inspection for DPF's on cars that should have them will form part of the MOT shortly, Anyone removing the DPf & fitting a by pass pipe ought to check this.
More than a rumour , cats are required irrespective of emissions next year with dpf's added some time later , although i expect those with "gutted" dpfs will be ok eltax91 said:
y2blade said:
how much have to spent trying to fix the Mazda?
what MY is the Octavia?
My garage is quite friendly, so I'm only out of pocket £70 currently on fixing the Mazda! They are going to try a further regen and recalibration on Friday.what MY is the Octavia?
The Octavia is a 54 plate, PD130 WITHOUT a DPF.
I deliberately avoided DPF when choosing (my Volvo S60 D5 is 2002 Euro3 so no DPF either)
eltax91 said:
Yes and no. Limp mode, whilst still driveable is a pain in the arse. Also, the fuel economy drops by around 20% when the DPF is clogged up. It's the time spent troubleshooting which hurts me. Lots of time messing with fault codes and doing a regen/ racalibration. Also, Mazda say the oil should be changed at each DPF regen (although my local guy is not doing so) because it's a "wet system", so unburt diesel is returned to the sump when the DPF fails to regen.
There seems little other option when it can't be bypassed and a replacement costs such a fortune. What the hell is in these things to cost so much I don't know. all I hear is "precious metals" when I ask.
All-in-all, the time its spent in the garage reminded my boss to have a chat with me about the fact he pays me a car allowance to have a reliable car... hence i've gone out and bought one.
Fair enough There seems little other option when it can't be bypassed and a replacement costs such a fortune. What the hell is in these things to cost so much I don't know. all I hear is "precious metals" when I ask.
All-in-all, the time its spent in the garage reminded my boss to have a chat with me about the fact he pays me a car allowance to have a reliable car... hence i've gone out and bought one.
If I had to buy a modern diesel, I think I would just get these things removed and bypassed.
You can take the DPF off and clean it out. Friend of mine had the same with his 730d. Threw the error and he had the thing chemically cleaned by a firm in Birmingham (IIRC). Cost about £250-300 and the DPF was then re-fitted. Not had the problem since. Considerably cheaper than getting a new one fitted.
MattOz said:
You can take the DPF off and clean it out. Friend of mine had the same with his 730d. Threw the error and he had the thing chemically cleaned by a firm in Birmingham (IIRC). Cost about £250-300 and the DPF was then re-fitted. Not had the problem since. Considerably cheaper than getting a new one fitted.
You didn't read the OP, did you?HellDiver said:
MattOz said:
You can take the DPF off and clean it out. Friend of mine had the same with his 730d. Threw the error and he had the thing chemically cleaned by a firm in Birmingham (IIRC). Cost about £250-300 and the DPF was then re-fitted. Not had the problem since. Considerably cheaper than getting a new one fitted.
You didn't read the OP, did you?A brief summation of my thoughts:
Do a google search for "Mazda 6 engine problems".
Find the Honest John website linked. Read all the threads you can.
If you are having a manual re-gen done on the DPF you must change the oil. If you don't you are just diluting your oil with Diesel. Diesel doesn't have a very high lubricity and will fk your engine.
These Mazda engines are fragile (despite what certain Mazda dealers and Mazda UK will try and fob you off with.
They have oil pick up issues that start off with the injector seals being under-specced. This puts burnt gasses in to the oil galleries which in turn get washed in to the sump by the oil. This clogs the strainer for the oil pump. Number 4 big end will be the bearing to let go. When it does it usually fks the crank journal too.
My advice.
Do a google search for "Mazda 6 engine problems".
Find the Honest John website linked. Read all the threads you can.
If you are having a manual re-gen done on the DPF you must change the oil. If you don't you are just diluting your oil with Diesel. Diesel doesn't have a very high lubricity and will fk your engine.
These Mazda engines are fragile (despite what certain Mazda dealers and Mazda UK will try and fob you off with.
They have oil pick up issues that start off with the injector seals being under-specced. This puts burnt gasses in to the oil galleries which in turn get washed in to the sump by the oil. This clogs the strainer for the oil pump. Number 4 big end will be the bearing to let go. When it does it usually fks the crank journal too.
My advice.
- change the oil if you've been running around with the DPF not working properly for a while.
- change the oil if you've had the DPF re-generated manually.
- change the oil anyway.
- get rid of the car.
- there is a certain Mazda Dealer that I would recommend you avoid at all costs who is near the location in your profile. PM me for details if you like.
- I learnt from bitter experience (and a raping of my savings) that these are not strong engines and you will get no back up from Mazda when it sts itself. Even if (hypothetically) it was a new, recon, engine having a DPF regen at a Mazda dealer when the 500 mile old engine was blown up. Allegedly.
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