Gen 3 owners please read! Camshaft Issue (Diesel)

[newmazdaowner]

It's really very much "ON" topic I think - Ross would you not agree? Glad to note that you have wised up though

[mar.eng]

Question: Why did Mazda on the 3 change to a Urea injection system instead of overfuelling of diesel oil on the exhaust stroke ??

I think they were already using it on the 3 and of course they had all the problems with the 2.0 diesels on the 6 so maybe they thought it would be a better solution than continuing to bodge up the older system? The 2.2 engines were introduced to remedy the DPF problems with the earlier 2.0 versions.

I meant why not fit the Urea system on the Mazda 6 3rd Generation, I don't see any problem topping up a urea tank each time I fill with diesel.

From what I have read and heard from my dealership it doesn't sound like the problem of the DPF was improved any on the 2.2 engines otherwise why have an X mark on the dipstick.
Why not have an injector downstream of the cylinders like the Toyota and inject fuel into the exhaust manifold, so it doesn't wash down the cylinder bores and contaminate the lube oil.
To say ( Dealer) these cars are only meant for motorway driving ( high exhaust temps), no car spends all its life on the motorway, in fact on a recent trip on the motorway I was subjected to 50mph average speeds and at times crawling in 2nd for mile after mile, with these 'smart ' motorway updates. M1, M25, M62, M6 and I belive they are starting it on the M4 and possibly all the others.

I am glad to hear Denvo got satisfaction from Mazda, but would it not been more economical to fit a new engine with the new camshafts rather than the 'fix it a little bit' attitude. They were very gracious in replacing the Turbocharger (even though they claim it wasn't warranted) but what about all the other bearings, timing chain and oil pump. Minute particles can still get through a filter ( hence changing the turbo) including diesel oil.

[ColinB]

The 2.2 diesels were definitely an improvement on the 2.0 models as I think the engineering was changed (can't recall exactly how now but I had no problems with my 2.2 and the oil level never changed between services). However, I suspect this may have been something of a blind alley engineering wise, just making the problem less evident rather than resolving it altogether for low mileage drivers.

Still glad I got a petrol for the Gen 3 so far!

[newmazdaowner]

Question: Why did Mazda on the 3 change to a Urea injection system instead of overfuelling of diesel oil on the exhaust stroke ??

I think they were already using it on the 3 and of course they had all the problems with the 2.0 diesels on the 6 so maybe they thought it would be a better solution than continuing to bodge up the older system? The 2.2 engines were introduced to remedy the DPF problems with the earlier 2.0 versions.

I meant why not fit the Urea system on the Mazda 6 3rd Generation, I don't see any problem topping up a urea tank each time I fill with diesel.

From what I have read and heard from my dealership it doesn't sound like the problem of the DPF was improved any on the 2.2 engines otherwise why have an X mark on the dipstick.
Why not have an injector downstream of the cylinders like the Toyota and inject fuel into the exhaust manifold, so it doesn't wash down the cylinder bores and contaminate the lube oil.
To say ( Dealer) these cars are only meant for motorway driving ( high exhaust temps), no car spends all its life on the motorway, in fact on a recent trip on the motorway I was subjected to 50mph average speeds and at times crawling in 2nd for mile after mile, with these 'smart ' motorway updates. M1, M25, M62, M6 and I belive they are starting it on the M4 and possibly all the others.

I am glad to hear Denvo got satisfaction from Mazda, but would it not been more economical to fit a new engine with the new camshafts rather than the 'fix it a little bit' attitude. They were very gracious in replacing the Turbocharger (even though they claim it wasn't warranted) but what about all the other bearings, timing chain and oil pump. Minute particles can still get through a filter ( hence changing the turbo) including diesel oil.

Sorry to say friends, that this line of thought definately IS off topic - please post this stuff on the other threads that are covering the DPF/Diesel fuel issues.

[Ordinadim]

That's exactly what is happening to my 2014 Mazda 6! (6k miles! )

Had a low oil pressure light on, took it to Romford Mazda.
Yesterday they told me they had to replace everything including the Turbo.

It's all under warranty so I'm ok with it, I just miss my car...

I'll keep you posted

[damtom85]

Can you give us your last 6 digits of your VIN number in this format , mine was 138*** and I had this issue too. It will be helpful for whole Mazda 6 community.

Regarding your issue , don't forget to fight for extended warranty for engine.

[Ordinadim]

I don't have my car atm as it's being fixed. Where else can I find the VIN number?

[damtom85]

Your log book, v5 from dvla

[Logicearl]

Been away from this forum for a while, my vin number's last 6 digits are JMZGY 158178 should I be worried?

[damtom85]

Been away from this forum for a while, my vin number's last 6 digits are JMZGY 158178 should I be worried?

No, you should be fine.