Gen 3 owners please read! Camshaft Issue (Diesel)

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Re: Gen 3 owners please read! Camshaft Issue (Diesel)

Postby newmazdaowner » Thu Apr 25, 2019 12:30 pm

mar.eng wrote:
newmazdaowner wrote:
Dave S wrote:


Had the car been a tad older I would have said that your problem is down to a dodgy camshaft being fitted. My understanding is that the no vehicle in 2014 were fitted with the 'soft' camshafts - but who knows? It's worth getting the definitive answer from Mazda


There was nothing wrong with the camshafts it was the camfollowers that were too hard causing wear on the camshaft.


Sorry - there is no such thing as "Too Hard"
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Re: Gen 3 owners please read! Camshaft Issue (Diesel)

Postby Dave S » Tue Jun 18, 2019 9:45 pm

Thanks for the comments, appreciated. It appears that the DPF was 4/5ths blocked which caused the problem with diesel getting into the sump. This sort of system must be a design fault by Mazda, after all who would allow fuel to enter the lubrication system. Will be attempting to get money back from Mazda as the independent garage advised that it was likely to have been partially blocked when I bought the car. Will be difficult to prove but surely shouldn't be that blocked after 31k miles and 4 and a half years. In case anyone else gets a similar problem, this has cost in excess of £5k to sort out. New bottom engine block and new DPF!!!
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Re: Gen 3 owners please read! Camshaft Issue (Diesel)

Postby Paul381 » Sat Jan 04, 2020 11:04 pm

My 2013 model has had 2 new camshafts and a turbo rebuild, incompatible materials the mechanic told me , a common problem but only half paid by Mazda.
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Re: Gen 3 owners please read! Camshaft Issue (Diesel)

Postby drljames » Tue Jan 28, 2020 2:02 pm

I only got my mazda in November (part ex'd my focus ecoboom).

It's a 2013 (april).. vin is JMZGJxxxxxx1124991

done 45k... I mailed mazda and got this response...

Thank you for your email to Mazda Motors UK.



After passing your enquire to our technical specialist , I can confirm that the vin supplied has no recalls either outstanding or completed for camshaft issues. As well as to this date Mazda has not released a campaign, bulletin or Mazda service program in the UK for soft camshafts on any Mazda 6.
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Re: Gen 3 owners please read! Camshaft Issue (Diesel)

Postby mar.eng » Sun Feb 16, 2020 1:06 pm

As Paul381 mentioned and my SM has told me, the cam followers were too hard and caused wear on the camshaft up to the early 2014's. This could be down to poor QA at the Chinese factories making the parts or even the Chines cutting corners as they are known to do, not just on small diesels but those that power large container ships.
Years ago you never used to get problems like this. I know Ford OHC engines used to wear their camshafts out, but that was due to owners not changing the oil at specified times and sludge blocking the oil ways, not a design/manufacturing problem. Check out the Recall section above. Others have had similar problems on newer engines.
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