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Noise dissapears above 2000rpm
addi.bigg Offline
OM605; 7,5mm elements
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#1
Noise dissapears above 2000rpm
OM605 7,5mm Dieselmeken elements, mechanical pump. Timing is in place, adjusted to the stock value.
The symptom is that while running in low rpm (1200-1300rpm), pressing the throttle pedal to speed up, some strange noise comes, some knocking which sudennly dissapears at 2000rpm. It seems like something is a bit late while increase the rpm and it's gain on at 2000rpm. Nothing above it. It always dissapears in the same rpm.
Any ideas what that can be?
02-07-2018, 12:38 PM
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CutWeldDrive Offline
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#2
RE: Noise dissapears above 2000rpm
as far as i know the 7,5mm Dieselmeken elements have a different timing value to stock.

someone maybe able to confirm or tell me i'm talking crap.

but nearly sure i saw this somewhere
02-08-2018, 11:50 AM
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Mr.Emo Offline
Nissan Patrol -> 606 conversion.
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#3
RE: Noise dissapears above 2000rpm
Yeah, they usually send out instructions with the pump.
02-08-2018, 12:18 PM
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addi.bigg Offline
OM605; 7,5mm elements
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Posts: 94
Joined: Aug 2016
Location: Hungary
#4
RE: Noise dissapears above 2000rpm
(02-08-2018, 11:50 AM)CutWeldDrive Wrote: as far as i know the 7,5mm Dieselmeken elements have a different timing value to stock.

someone maybe able to confirm or tell me i'm talking crap.

but nearly sure i saw this somewhere

The quantity is low 85-90ccm. I'm really not on the borderline from the upper side.
02-09-2018, 01:03 AM
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addi.bigg Offline
OM605; 7,5mm elements
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Posts: 94
Joined: Aug 2016
Location: Hungary
#5
RE: Noise dissapears above 2000rpm
If the oil pump chain is not tight enough what kind of noise it can make?
02-09-2018, 01:04 AM
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barrote Offline
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Location: Portugal
#6
RE: Noise dissapears above 2000rpm
Mos probably the noise u mention is nailing due to excess advance in low rpm.
Once the threshold is passed it goes. Replace timming sprocket by a 605 N/A.
FD,
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02-09-2018, 04:56 AM
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addi.bigg Offline
OM605; 7,5mm elements
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Posts: 94
Joined: Aug 2016
Location: Hungary
#7
RE: Noise dissapears above 2000rpm
(02-09-2018, 04:56 AM)barrote Wrote: Mos probably the noise u mention is nailing due to excess advance in low rpm.
Once the threshold is passed it goes. Replace timming sprocket by a 605 N/A.

I've sent you a pm.
02-12-2018, 03:07 PM
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addi.bigg Offline
OM605; 7,5mm elements
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Posts: 94
Joined: Aug 2016
Location: Hungary
#8
RE: Noise dissapears above 2000rpm
https://www.youtube.com/watch?v=NuL12eCn...e=youtu.be

Any suggestions regarding this noise?

This is the one that dissapears. If the engine is cold it is louder.
(This post was last modified: 02-13-2018, 12:45 PM by addi.bigg.)
02-13-2018, 12:42 PM
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addi.bigg Offline
OM605; 7,5mm elements
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Posts: 94
Joined: Aug 2016
Location: Hungary
#9
RE: Noise dissapears above 2000rpm
(02-13-2018, 12:42 PM)addi.bigg Wrote: https://www.youtube.com/watch?v=NuL12eCn...e=youtu.be

Any suggestions regarding this noise?

In this you can hear when the noise dissapears.

https://youtu.be/GK_naRLhslk
02-13-2018, 12:44 PM
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NoFear Offline
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#10
RE: Noise dissapears above 2000rpm
Same problem. What is the solution?
08-07-2019, 12:43 AM
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barrote Offline
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#11
RE: Noise dissapears above 2000rpm
Those engines in the videos sound really bad... my sugestion on the advance mechanism is still valid.
Check out it is working properlly. Sometimes they do not, cause of a design flaw. Using a older 605 N/A solve the problem.
But its definetly timing related... its god damm advanced...
FD,
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08-08-2019, 09:25 AM
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NoFear Offline
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#12
RE: Noise dissapears above 2000rpm
08-14-2019, 01:45 PM
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