I have had a humming or low pitch vibration which sounds like it is from the motor. This sound happens when the motor warms up and continues as I drive. It also can be heard after the motor is not running. This only last for a short time and sounds like a hum or medium pitch vibration. I had my in tank fuel tank pump replaced. This did not solve the problem. Preformance has not been effected. The motor runs strong. This has been going on for over 10,000 miles.....What is this hum or whinning noise???
2004 sprinter 2500 fuelpump ??
- Thread starter Rodney 49
- Start date
MillionMileSprinter
Millionmilesprinter.com
It could the "dosing pump" for the Espar heating system. It is located on/near the firewall between the engine block and the battery. Use the search function and you can find a photo of it.
Or fuel pressure relief valve:
https://sprinter-source.com/forums/showpost.php?p=159795&postcount=3
and
https://sprinter-source.com/forums/showthread.php?t=23918
https://sprinter-source.com/forums/showpost.php?p=159795&postcount=3
and
https://sprinter-source.com/forums/showthread.php?t=23918
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NelsonSprinter
Former Nelson BC Sprinter
If you have a smartphone or digital camera, please post a recording to Youtube and post a link on here so we can hear it too ?
Gulf SV
Kevin Burns
Joel, isn't the dosing pump under the van, like below the driver seat? The water pump is what's on the firewall.
MillionMileSprinter
Millionmilesprinter.com
You could be correct. I may have the wrong name for the pump. But you and I are talking about the same pump, whatever it's called. One would think I would remember the name because I had to replace it in my '02Joel, isn't the dosing pump under the van, like below the driver seat? The water pump is what's on the firewall.
A few things to check
The aux electric water pump which Kevin mentioned.
The fuel lines under the van have been known to break loose from the plastic supports and may then make noise.
The high pressure fuel pump relief valve.
Turbo John gives this method for checking for the pump relief valve.
The aux electric water pump which Kevin mentioned.
The fuel lines under the van have been known to break loose from the plastic supports and may then make noise.
The high pressure fuel pump relief valve.
Turbo John gives this method for checking for the pump relief valve.
vicTurbo John said:
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drew502
Member
I just stumbled onto this thread and I'm certain that I have this issue with the high pressure relief valve on my 04/T1N/2500. I have had the exact symptoms described by Turbo John since I bought the vehicle and it has always annoyed me. In another post Dr. A says that almost all 04's have this issue if the valve has not been changed.
Could someone be so kind as to post pictures of the pump and valve location and any tips for replacement?
Also, does replacing the valve:
1. quiet the pump while the vehicle is running and
2. eliminate starting and stopping pump drone,
3. do anything else?
Thanks!
Could someone be so kind as to post pictures of the pump and valve location and any tips for replacement?
Also, does replacing the valve:
1. quiet the pump while the vehicle is running and
2. eliminate starting and stopping pump drone,
3. do anything else?
Thanks!
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Reports are that it quiets everything.
I don't believe that it affects operation at all, but I suppose it could over the long haul.
It is mounted on the front of the engine. You will recognize it from the pictures above.
Turbo John did a great job of describing the valve change.
vicTurbo John said:I had the same problem and nobody really had the answer for me but I just finished it so I can tell you.
The Fuel pressure relief valve under the left side of the forward mechanical fuel pump would be difficult to do without the following.
Took me one hour.
I cut a 16 MM box end wrench down to 5 inches in length and narrowed the handle for more movement.
you need that exact wrench.
Remove the fan shroud.....no need to touch the radiator.
Remove the Serpentine Belt.
Remove the Turbo Shroud
Now you can attach the box end to the valve almost from the front and turn it clockwise.
Its a good idea to get a Mirror for the location and of course have the new fuel pressure valve
My ball valve in the old part was coated with the diesel fuel death.
Replace everything and no more noise!
I decided to replace the serpentine belt because it had 75,000 miles. It was dry cracked so a good idea. 45.00 dollars for a new dayco belt was worth it. The valve cost $58.00 dollars.
Hope this helps youl.....
drew502
Member
Thanks Vic! I wonder if it's possible to change the valve w/o removing all that stuff?
In another post: https://sprinter-source.com/forums/showthread.php?t=23918
+drive commented - "Yes, I have an 04 and had the issue. With lean fingers and some luck, it was a pretty fast fix; I don't recall removing any major components for access."
In another post: https://sprinter-source.com/forums/showthread.php?t=23918
+drive commented - "Yes, I have an 04 and had the issue. With lean fingers and some luck, it was a pretty fast fix; I don't recall removing any major components for access."