Found this in the latest EVO email.

http://www.classicandperformancecar.com/skoda/octavia?_mout=1&utm_campaign=newsletter&utm_medium=email&utm_source=newsletter

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Very good read, thank you. There a few faults in there that mine has had, and the point about the DMF is disheartening. I have a horrible feeling mine is on its way out.  Wouldn't surprise me greatly given it has 70k.  

Very good read, thank you. There a few faults in there that mine has had, and the point about the DMF is disheartening. I have a horrible feeling mine is on its way out. Wouldn't surprise me greatly given it has 70k.

Yeah we know that the DMF is considered a wear and tear part by VW, matter of time for most owners.

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Yeah we know that the DMF is considered a wear and tear part by VW, matter of time for most owners.

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Is 70k a reasonable amount to for the DMF to need replacing?

Is 70k a reasonable amount to for the DMF to need replacing?

I seemed to recall reading about 80k was the mileage they considered normal.

Usage and driving style may well be a factor.

Lot of talk about SMF conversions, not sure if the vRS is a contender; so do a search here.

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I seemed to recall reading about 80k was the mileage they considered normal.

Usage and driving style may well be a factor.

Lot of talk about SMF conversions, not sure if the vRS is a contender; so do a search here.

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Well I don't really go out now for sporty runs.  If I'm on a country road I will enjoy putting my foot down a bit, but I'm never chucking it round corners pretending I'm a rally driver. Mainly, the car is used for A - B journeys now, as boring as that is. 

 

It spend about 35k on rural roads so it has probably had a tough life.  I wouldn't be surprised if it's due to be changed.  I'll ask Swift to check it out and give me their opinion when it's in having some parts replaced soon.

 

I'd read up on SMFs a bit, but tbh I'd probably want to keep it all OEM.

Biggest killer of DMF's is abuse, followed by engine management issues. Anything that affects the way the crank rotates will affect the DMF, so for example iffy injector spray pattern (more so on the old PD engines that haven't been looked after properly) low common rail pressure at start up (excessive cranking), plenty of possibilities. Average life span is anywhere from 80-150k for normal usage.

Biggest killer of DMF's is abuse, followed by engine management issues. Anything that affects the way the crank rotates will affect the DMF, so for example iffy injector spray pattern (more so on the old PD engines that haven't been looked after properly) low common rail pressure at start up (excessive cranking), plenty of possibilities. Average life span is anywhere from 80-150k for normal usage.

 

Mine hasn't had any injector issues that I'm directly aware of, but the carbon build up on the valves and injector nozzles were really bad when I replaced my IM. That's all clean now but I suppose it is possible that the carbon build up has affected the fuel delivery.

 

It also had the timing chain tensioner fail ~22k miles ago so could that have caused any damage to the DMF?

Mine hasn't had any injector issues that I'm directly aware of, but the carbon build up on the valves and injector nozzles were really bad when I replaced my IM. That's all clean now but I suppose it is possible that the carbon build up has affected the fuel delivery.

 

It also had the timing chain tensioner fail ~22k miles ago so could that have caused any damage to the DMF?

 

Unlikely, unless the engine came to a sudden stop (violently) - the number of garages that hear a rattle in the engine bay and automatically assume it's the DMF is scary, they then wonder why the noise comes back after 6 months. I always tell people the best way to think of a DMF noise is that it's a symptom, not usually a cause (in case anyone is wondering I work for LuK)

If we are talking chains that means it's a petrol right and therefore no DMF ?

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If we are talking chains that means it's a petrol right and therefore no DMF ?

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Nope - rough breakpoints on DMF's are 150bhp and above for petrol and 100bhp and above for diesel - although quite a few smaller capacity diesels (like the 1.6 from 2011 onwards) are reverting to single mass, as the stop start system hammers the DMF's

Nope - rough breakpoints on DMF's are 150bhp and above for petrol and 100bhp and above for diesel - although quite a few smaller capacity diesels (like the 1.6 from 2011 onwards) are reverting to single mass, as the stop start system hammers the DMF's

I stand corrected, I only seem to read about diesel drivers mentioning them. [emoji51]

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