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+--- Thread: Persistent annoying engine noise -OM605 (/showthread.php?tid=5968)
Persistent annoying engine noise -OM605 - starynovy - 11-03-2014
Hello people.. I need help from more skilled ones with these engines. I have read many threads on this topic, but only one seemed to have solved it. As the guy said, "it was clodged center oil hole in timing sprocked", as he cleaned it, noises stopped. Does that sprocked have this center hole? Could it be the cause? I have run into several people having this issue so I guess its not so uncommon. That loud buzing is V-belt, its damper is fresh new Febi unit, no change at all. Harder to hear is engine itself, which when enter said RPMs will start to nail and klack like crazy, under or above its quiet as seen on video. What do you suggest?
What I am into: New SD314 nozzles on the way, but that wont solve belt noise even if it solves nailing.
https://www.youtube.com/watch?v=VvWMqhvCMVc&feature=youtu.be
RE: Persistent annoying engine noise -OM605 - EDH_Performance - 11-04-2014
(11-03-2014, 11:00 AM)starynovy Hello people.. I need help from more skilled ones with these engines. I have read many threads on this topic, but only one seemed to have solved it. As the guy said, "it was clodged center oil hole in timing sprocked", as he cleaned it, noises stopped. Does that sprocked have this center hole? Could it be the cause? I have run into several people having this issue so I guess its not so uncommon. That loud buzing is V-belt, its damper is fresh new Febi unit, no change at all. Harder to hear is engine itself, which when enter said RPMs will start to nail and klack like crazy, under or above its quiet as seen on video. What do you suggest?
What I am into: New SD314 nozzles on the way, but that wont solve belt noise even if it solves nailing.
https://www.youtube.com/watch?v=VvWMqhvCMVc&feature=youtu.be
Have you tried to run the engine without the belt?
RE: Persistent annoying engine noise -OM605 - starynovy - 11-06-2014
Will try that when I fit shorter belt to remove AC compressor. But that nailing is clearly audible and should not be there. I will make video without belt so its only nailing. In the mean time I changed nozzles, no change.
RE: Persistent annoying engine noise -OM605 - Volker407 - 11-07-2014
(11-06-2014, 03:42 PM)starynovy Will try that when I fit shorter belt to remove AC compressor. But that nailing is clearly audible and should not be there. I will make video without belt so its only nailing. In the mean time I changed nozzles, no change.
Like I mentioned in the other thread, the nozzles need time to settle. But I don´t think it is nozzle related.
To me it sounds like a loose metal line or fitting, rattling on the main engine block or cylinder head.
Gruß
Volker
RE: Persistent annoying engine noise -OM605 - starynovy - 11-07-2014
Well I am sure it comes from tensioner assembly. But the upper bolt is firm, as it was previously stripped I cut new M10 thread and fitted new bigger bolt and new damper with enlarged hole to accomodate M10 bolt ofc. When I get engine in those RPMs, belt starts to oscilate and that cause those noises I presume. But why on earth it oscilates if its dampened by new Febi dampener? Is something else in that assembly prone to failure? This is not normal operation.
RE: Persistent annoying engine noise -OM605 - Petar - 11-08-2014
There is a bushing on the tensioner arm that can wear out and cause a rattle.
RE: Persistent annoying engine noise -OM605 - Duncansport - 11-08-2014
Classis damper noise. May be a frozen or sticking tensioner arm pivot as well
RE: Persistent annoying engine noise -OM605 - starynovy - 11-08-2014
It will have something to do with that arm for sure as I changed two dampers one of which is new and it still buzzes. Thanks for pointing this out, will investigate. There will be bolt hidden behind plastic cap on pivot point I suppose?
RE: Persistent annoying engine noise -OM605 - DiseaselWeasel - 11-09-2014
Yes.
605 should have a bushing in the arm, in that case best renew both bolt & arm. And whilst you'r at it; get a new tensioner pulley too! They'r cheap enough.
RE: Persistent annoying engine noise -OM605 - starynovy - 11-09-2014
So I took it apart and there is some play in that arm, about 0.3mm. And the noise is caused by oscilating belt hitting vac pump and pivot itself as it runs in close proximity. Now to see how much that arm costs.
RE: Persistent annoying engine noise -OM605 - DiseaselWeasel - 11-16-2014
renew damper too!! Damper itself might feel fine - but the bolt eye wears out...
RE: Persistent annoying engine noise -OM605 - starynovy - 11-16-2014
(11-16-2014, 07:24 AM)DiseaselWeasel renew damper too!! Damper itself might feel fine - but the bolt eye wears out...
I have new damper, and found whole arm with pivot bolt for some 35€.. so 55€ with damper. Both FEBI so will see how it lasts.
RE: Persistent annoying engine noise -OM605 - EvoPeter - 11-18-2014
Had this problem with the v-belt that it was buzzing. I got it when i deleted the AC pump and the belt i ordered was a PK2080 belt. New tensioner, damper, v-belt and wheel. The damper could reach 190C (IR thermometer) on idle due to the vibration from belt. I got this problem sorted out when i mounted a slightly shorter belt. Now i have a PK2040 and the engine is silent and smooth.
Also there is different belts depending on the wheel size of the servo pump.
RE: Persistent annoying engine noise -OM605 - starynovy - 11-18-2014
(11-18-2014, 02:47 AM)EvoPeter Had this problem with the v-belt that it was buzzing. I got it when i deleted the AC pump and the belt i ordered was a PK2080 belt. New tensioner, damper, v-belt and wheel. The damper could reach 190C (IR thermometer) on idle due to the vibration from belt. I got this problem sorted out when i mounted a slightly shorter belt. Now i have a PK2040 and the engine is silent and smooth.
Also there is different belts depending on the wheel size of the servo pump.
Ohohoho thats much appreciated info, that damper gets insanely hot and belt also oscilates. I deleted AC compresor like you and ordered belt for cars without AC but I will check its lenght. Thanks.
RE: Persistent annoying engine noise -OM605 - EvoPeter - 11-19-2014
(11-18-2014, 03:46 AM)starynovy Ohohoho thats much appreciated info, that damper gets insanely hot and belt also oscilates. I deleted AC compresor like you and ordered belt for cars without AC but I will check its lenght. Thanks.
Glad i could help. I tried everything before i ordered a new belt. Only thing that helped was to adjust the idle to 1000rpm but who whats the idle that high on a car?
Now its about 600rpm without problem.
RE: Persistent annoying engine noise -OM605 - MrHope - 12-28-2014
If you change the alternator wheel to a freewheel it will probably be fine, ive had this problem with a 606
RE: Persistent annoying engine noise -OM605 - EvoPeter - 01-08-2015
(12-28-2014, 06:24 PM)MrHope If you change the alternator wheel to a freewheel it will probably be fine, ive had this problem with a 606
How did u do that? On my alternators (Valeo) the output shaft is to short to fit a free wheel as i can see it.
RE: Persistent annoying engine noise -OM605 - EvoPeter - 01-08-2015
This free wheel generator is very hard to source for a om605 but i finaly found one Bosch 0123320046 from a om602 2,9TD. Would be good in my car as it frequently visit the tracks.
RE: Persistent annoying engine noise -OM605 - EvoPeter - 01-17-2015
Looks like you can just buy the free wheel and convert.