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  #1  
Old 11-28-2007, 04:51 PM
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603 Drivers. Can you hear your Injection Pump?

I have noticed that when I press the stop button on my om603 engine that I hear a noise every time. Kindof a ehhhhh sound that lasts for about 5 seconds. If I turn the key off, I never hear the noise. It's only when I have the key on and manually press the STOP button on the pump that I get the noise.

Anybody else heard this noise or do I have a weird IP?




ALSO, I can hear the IP making some sort of similar sound (maybe the idle control electronics) when I'm at idle when the engine is warm... Weird. But every stop sign I can hear it once the engine is warmed up.

Any clue as to what this is?

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Last edited by 777funk; 11-28-2007 at 05:09 PM.
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  #2  
Old 11-28-2007, 05:27 PM
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Quote:
Originally Posted by 777funk View Post
Any clue as to what this is?
........operator problem........
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  #3  
Old 11-28-2007, 06:30 PM
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Quote:
Originally Posted by Brian Carlton View Post
........operator problem........
Hey Man, go easy on a brother!

The car did this when I bought it so if it's operator error, it's the operator before me Ha ha
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-Suburban '93 220k
-Diesel Jetta '03 350k

Sold
--E320 '95 200k
-E320 Wagon 1994 155k
-300d Turbo '87 187k miles
-E320 1994 200k
-300d Turbo '84 245k (sold to Dan62)
-300d Turbo '84 180k
-300sd '80 300k
-7.3 Powerstroke Diesel 15P Van 500k+ miles
-190d '89 Non Turbo 2.5 5cyl 240k (my first MB)
Tom's Imports of Columbia Missouri Ruined the IP in changing leaky delivery valve O-Rings - Refused to stand behind his work. Mid-MO MB drivers-AVOID Tom's!

Last edited by 777funk; 11-28-2007 at 06:40 PM.
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  #4  
Old 11-28-2007, 06:54 PM
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Don't know never noticed it. Shut the car off with the key like your supposed to.
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  #5  
Old 11-28-2007, 07:24 PM
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So No Sound when you press STOP?
__________________
-Suburban '93 220k
-Diesel Jetta '03 350k

Sold
--E320 '95 200k
-E320 Wagon 1994 155k
-300d Turbo '87 187k miles
-E320 1994 200k
-300d Turbo '84 245k (sold to Dan62)
-300d Turbo '84 180k
-300sd '80 300k
-7.3 Powerstroke Diesel 15P Van 500k+ miles
-190d '89 Non Turbo 2.5 5cyl 240k (my first MB)
Tom's Imports of Columbia Missouri Ruined the IP in changing leaky delivery valve O-Rings - Refused to stand behind his work. Mid-MO MB drivers-AVOID Tom's!
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  #6  
Old 11-28-2007, 08:24 PM
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Nope, not that I remember.
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  #7  
Old 11-28-2007, 08:30 PM
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When I replaced my shut off valve on my 602 I noticed that pressing on the stop lever pushed the diaphragm on the valve up which created a little pressure in the line to the key switch if the key was not in the off position. Perhaps the noise you are hearing is that pressure bleeding off. It also could be some electrically operated vacuum devices (switchover valves, transducers, etc) continuing to operate (since the key is still in the on position) off the residual vacuum
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  #8  
Old 11-28-2007, 08:58 PM
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Yep i hear a sound when i press the stop tab on the engine. I think 2.5T pretty much explained what it could be. To me it doenst really sound electronic but more vacuum related.
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  #9  
Old 11-29-2007, 05:57 PM
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It seems like when I'm at a stop sign, I can hear the injection pump trying to regulate idle speed and it seems like for a second or two after stopping the IP is getting it's bearing. It slightly speeds up, slows down, speeds up, and stabilizes. That's all after I stop and within a second or two.
But I can hear this stuff that 2.5 described doing it's thing. I wonder if it's all ok. If I can't figure it out, I'm not worried, I'll drive it till it dies no matter what but wondering if it's changeable components that are doing this.
__________________
-Suburban '93 220k
-Diesel Jetta '03 350k

Sold
--E320 '95 200k
-E320 Wagon 1994 155k
-300d Turbo '87 187k miles
-E320 1994 200k
-300d Turbo '84 245k (sold to Dan62)
-300d Turbo '84 180k
-300sd '80 300k
-7.3 Powerstroke Diesel 15P Van 500k+ miles
-190d '89 Non Turbo 2.5 5cyl 240k (my first MB)
Tom's Imports of Columbia Missouri Ruined the IP in changing leaky delivery valve O-Rings - Refused to stand behind his work. Mid-MO MB drivers-AVOID Tom's!
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  #10  
Old 07-14-2008, 02:27 PM
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Ok to finish the thread. I feel dumb even admitting what the sound was, but Brian's post was right, "operator error" lol. It was the shock on the idler pulley. The bushing to bolt wasn't tight and it'd rattle a bit while coming down to idle or at times while idling. I put a rubber washer on the bolt between the shock and engine block and it's silent. So it wasn't the IP, just a rattle of an old car. The stop button still makes it's sound when pressed but I'm guessing that's normal.

On another note... I was at a diesel injection shop a few weeks ago having my injectors pop tested and they had some pump on a bench and they were spinning it on a machine. That you could hear. Without the engine noise the IP spinning for a bench test at different RPMs sounded just like the engine. I think it was a 4 cyl box truck IP because it was a quieter version that was resemblent of a small Isuzu or Mitsubishi type engine running. Sounded pretty cool actually! Wouldn't mind an IP in a case somewhere on display in my garage. Cool souding little thing! Pretty neat.

__________________
-Suburban '93 220k
-Diesel Jetta '03 350k

Sold
--E320 '95 200k
-E320 Wagon 1994 155k
-300d Turbo '87 187k miles
-E320 1994 200k
-300d Turbo '84 245k (sold to Dan62)
-300d Turbo '84 180k
-300sd '80 300k
-7.3 Powerstroke Diesel 15P Van 500k+ miles
-190d '89 Non Turbo 2.5 5cyl 240k (my first MB)
Tom's Imports of Columbia Missouri Ruined the IP in changing leaky delivery valve O-Rings - Refused to stand behind his work. Mid-MO MB drivers-AVOID Tom's!

Last edited by 777funk; 07-14-2008 at 02:40 PM.
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