STD Tuning Engine Noise dissapears above 2000rpm

Noise dissapears above 2000rpm

Noise dissapears above 2000rpm

 
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addi.bigg
OM605; 7,5mm elements

94
02-07-2018, 12:38 PM #1
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?
addi.bigg
02-07-2018, 12:38 PM #1

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?

CutWeldDrive
Naturally-aspirated

19
02-08-2018, 11:50 AM #2
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
CutWeldDrive
02-08-2018, 11:50 AM #2

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

Mr.Emo
Nissan Patrol -> 606 conversion.

69
02-08-2018, 12:18 PM #3
Yeah, they usually send out instructions with the pump.
Mr.Emo
02-08-2018, 12:18 PM #3

Yeah, they usually send out instructions with the pump.

addi.bigg
OM605; 7,5mm elements

94
02-09-2018, 01:03 AM #4
(02-08-2018, 11:50 AM)CutWeldDrive 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.
addi.bigg
02-09-2018, 01:03 AM #4

(02-08-2018, 11:50 AM)CutWeldDrive 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.

addi.bigg
OM605; 7,5mm elements

94
02-09-2018, 01:04 AM #5
If the oil pump chain is not tight enough what kind of noise it can make?
addi.bigg
02-09-2018, 01:04 AM #5

If the oil pump chain is not tight enough what kind of noise it can make?

barrote
Superturbo

1,627
02-09-2018, 04:56 AM #6
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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barrote
02-09-2018, 04:56 AM #6

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,
Powered by tractor fuel

addi.bigg
OM605; 7,5mm elements

94
02-12-2018, 03:07 PM #7
(02-09-2018, 04:56 AM)barrote 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.
addi.bigg
02-12-2018, 03:07 PM #7

(02-09-2018, 04:56 AM)barrote 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.

addi.bigg
OM605; 7,5mm elements

94
02-13-2018, 12:42 PM #8
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.
addi.bigg
02-13-2018, 12:42 PM #8

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.

addi.bigg
OM605; 7,5mm elements

94
02-13-2018, 12:44 PM #9
(02-13-2018, 12:42 PM)addi.bigg 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
addi.bigg
02-13-2018, 12:44 PM #9

(02-13-2018, 12:42 PM)addi.bigg 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

NoFear
Naturally-aspirated

2
08-07-2019, 12:43 AM #10
Same problem. What is the solution?
NoFear
08-07-2019, 12:43 AM #10

Same problem. What is the solution?

barrote
Superturbo

1,627
08-08-2019, 09:25 AM #11
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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barrote
08-08-2019, 09:25 AM #11

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,
Powered by tractor fuel

NoFear
Naturally-aspirated

2
08-14-2019, 01:45 PM #12
Is this normal sound? https://youtu.be/jl55lNaYGz0
https://youtu.be/HTKOZvW_tik
NoFear
08-14-2019, 01:45 PM #12

Is this normal sound? https://youtu.be/jl55lNaYGz0
https://youtu.be/HTKOZvW_tik

 
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