enigne sounds strange?
I have in the last days notised that when my engine has reached it´s working temperature the typical "ticking" from the diesel engine intensifies.
If i roll down the windows i hear it clearly while driving..
Im not surpriced if you guys dont understand what I mean but if you do, is this something anyone have any ideas about?
Best regards /
Rollin
I can understand you description. I had a similar sound on my engine. It was the hydraulic elements. This is the piece between the cam and the valve. It is filled with oil from the engine lubrication system. As it gets old it doesn't fill with oil correctly and becomes loose. Thus the louder noise.
They cost about £12ea (12 required) from MB, but to replace them the cam needs to be removed which means removing the cam chain as well. So it is quite a job.
When I did mine the sound was much quieter and I'm sure that the power was better as the valve timing and lift was correct again.
Hi what is the oil pressure like when the engine is hot ?? and what grade of oil are you using and when was the oil and filter changed last?? try an oil and filter change ...if quieter.. add a "slick 50" treatment and then listen for the clatter..as a last resort is change the hydraulic tappets as Roly says rgds
Hi any smoke ? it sounds like injector knock .. if the noise has developed after using the injector cleaner.... suggest you try another set of injectors rgds
No smoke at all (like before). Do you mean i have to change the injectors? not just adjust them?
Hi i njectors must be set up on a special testbench to make sure that they inject at the right pressure and that the spray pattern is correct.I do not believe that they can be "adjusted" in situ.if you relate to what you did to cause the rattle to develop then the use of a cleaning agent appears to be the main possibility resulting in the injectors becoming erratic. check the engine oil for diesel smell caused by the excess diesel being injected washing down the walls of the cylinders and contaminating the engine oil..
I was talking with a diesel injection specialist a few days ago and he claimed that most diesel injector cleaners caused more problems than they fixed.
The only additive he recommended was one that replaced the lubrication properties of sulphur, the content of which has of course been drastically reduced over the past few years.
I bought some (OK I’m a sucker for snake oils!) and a slight “stutter†at around 1900rpm has disappeared :D :D
Yes I had a bad feeling when i poure the bottle of cleaner into the tank (dont mess with something that workes perfectly!). But I feelt like I HAD to try it...
But while driving yesterday afternon and driving to work today (with windows down) :) I heard the chattering hade disappeared!!? Quite strange... but it sounds just like before i i had the cleaner bottle added.
I will keep my ears out of the windows for a while just to be sure.. :)
Thanks guys for all your help! Its like always priceless info
Have a good day
I can still hear the chattering sometimes.. It seems to come and go.. The oil didn´t smell diesel. But maybe im going to change the filter and engine oil to start with.. hmm
Im running on 0w 40 Mobile 1 oil.
that could be your problem. Follow the spec. in the hand book. In my experience older engines with hydralic tappets don't like thin syntheic oil
I´ve been thinking the same about the oil.. Its a true winteroil. And now its summer.. maybe something to do with oil getting to thin.
Do you suggest to change to a 5w 40? or more?
I still want it to work well in the cold winter.. I will check what MB recomends in the instructions..
IMO can't go wrong with top quality 10W 40 semi synthetic.
Great for all seasons.
Regards
Peter
i have just ordered valvoline 10w40 from demon tweaks at £18 for 5l. it arrives today together with redline gear oils :lol:
I have now changed the engineoil and filter to Mobile 1 5w 40.
The old filter was really heavy filled with s**t because of the injetorcleaner.
The engine chatter still remains.
I had my mechanic looking at it yesterday and he claimed with no doubt its the tappets in the valves thats wourne out. After all that dirt removed its now wrong size. He ordered new ones and we are replacing them next month.
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Thanks for replies guys!
2 weeks ago i bougth a can of diesel injectioncleaner a quite strong one. I mixed that with the diesel when refilling the tank 2 times. Im starting to think that after removing "dirt" from the injectors (valves? not sure of the english word for it) these have to be adjusted again. I think they were adjustet during the service session in january but then the injectors were dirty so maybe it has to be adjusted again?
The oilpressure, enginetemp and engine power is unchanged since the "chatter" started. = everything is normal. The oilfilter was also changed in january. Im running on 0w 40 Mobile 1 oil. the truck has been roling 5000km since then.