[QUOTE=salesky;242587]على الأرجح عمود الكامات للعادم. واجهتُ نفس المشكلة، وكان كل شيء على ما يرام، ثم عند تخفيف السرعة أو الضغط على الفرامل، ظهر رمز الخطأ.

[فهمي لسبب حدوث ذلك] هو أن عمود الكامات مُستهلك، ولا يفتح صمام العادم بشكل كافٍ. فتعود الغازات إلى مدخل الهواء، مما يؤدي إلى ظهور عطل في حساس تدفق الهواء (MAF).[/QUOTE
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Gab es noch andere Symptome, zum Beispiel einen erhöhten Dieselverbrauch oder Leistungsverlust bei hohen Geschwindigkeiten? Ich habe das gleiche Problem. Ich habe den Luftmassenmesser und den MAP-Sensor gewechselt und das Ansaugkrümmer, das EGR-Ventil und den Ladeluftkühler gereinigt, aber das Problem besteht weiterhin.?

 

Maybe there was small power loss but as camshaft worns out slowly you also slowly loose power over time and it isnt noticable

 

Not sure about what the OP said??? This really is a predominantly English speaking forum and I do respect other members from different countries it is better served common sense and polite to at least use both the country of origin spoken language with a translated version in English ?

Camshaft that wearing out is highly unlikely because they are made of one of hardest materiel in the engine unlike the bearing and bearing surface that support the camshaft. Unless the oil was contaminated other parts or bearing were worn or damaged then general any wear happen on a camshaft would be extremely high mileage in the 200,000 or more range and even then, it would be cam bearing wearing out and not the camshaft.

As for noticing a camshaft that is not up to specification, (example slight wear) can be found using a vacuum gauge and or oscilloscope or a combination of both after all other possible engine running issues were ruled out.

 

You are aware of the fact that cx5 2.2d are prone to camshaft wear? It's like a gold standard for this engines.

But, yeah you are right, something must ve wrong with oil dustribution. We can also see the same issue on some KTM 790/890 bikes.

 

wow want to that fact from Mazda?
I did not know that we had another member that was in the camshaft manufacturing in any capacity. Good to know !
Maybe you can fill in the missing information instead of a blanket statement of information?


As those who are versed in camshaft manufacturing know that the material used in camshafts and the prosses for machining them to specification, one step is many polished the three mani areas or basically all the contact areas and the billets even if they are cast, or higher level of quality used are high density material. When the cam braw billet is machined for the specification the surfaces are also either polished at the end of the machining or a polish or micro polish is done. Anything that contacts the main area of a camshaft that control other part like HLA, lifters etc., are unless there is oil contamination, excessive valve spring pressure used or other parts not properly fitted or correctly aligning on the proper area of the camshaft can cause damage or premature wear generally to any a few lobes not all of them unless as mentioned incorrect parts were choose to use on a specific camshaft during predominantly l higher RPM use. RPM use can be defined as anything between 2000-13,000 RPMs


So, in a nutshell a blanket statement that claims of any platform and early or other reports of camshaft wear without all the complete with details and pictures as well at least one metal testing performed to support any claims, pictures and fact-based documentation with all the information and can say that very few ever to get this examine properly even with basis simple tests. So we are left to someone that does not really have the qualification but wrote a report at some dealership and sent it to the auto manufacture corporate office and they reviewed it and possibly added it to a TSB or just maybe ......... it just DIY internet myth?

 

OK, I'm sorry my post put you on max rpm. I'm glad you were able to spill it out.

Did I ever said I know why camshaft wear happens? I just said that my issue with p0101 was with worn camshaft. There are multiple forum post and YT videos showing worn camshafts on 2.2d. I can also send images from my camshaft if you wish.

 

it made me laugh … as for your issue you claim caused from a P0101 and were told it was a worn camshaft.
As for other posts on various sites I have seen and read many of them. They are all lacking full information as I am sure your information is as well. But sure post the pictures of the cam and the HLAs

I do ROLMAO you comparing a KTM to a Mazda diesel engine 😂


if it was the fault of a camshaft ALL the lobes would have the same wear not just 1 or 2 or even a few but ALL
So I hope Ypur pictures reflect that

 

FYI early SH diesel engines had a lot of issues with excessive cam load wear.

 

Good supportive picture of my explanation of camshaft composition and how a camshaft gets damaged or wear by the parts making contact with it and not the camshaft itself being defective in quality of the metal or the end grind of the product.
Yes, and in that picture it does clearly show that it was not caused from a defective cam but the design of the parts that the camshaft was run in. Looking at the camshaft "LOBE" to the left shows that which is what I was explaining in the last couple of responses.

So while the service problem description in the end may use the word "wear" it is cause and effect of bad engineering and not the actual camshafts fault
In the aftermarket world of camshaft if you purchased a camshaft and then attempted to return it as a defective camshaft and it looked like that exact picture you would be denied a refund or exchange. And the reason every time world be you have a problem with your head valve train components that the camshaft rune in or on not the camshaft. A metal hardest and or x-ray test would also confirm this.

The conclusion would be replacing the camshaft will only end in another camshaft being damaged and the problem not corrected causing the damage to the camshaft.