PeachParts Mercedes-Benz Forum

PeachParts Mercedes-Benz Forum (
-   Diesel Discussion (
-   -   Fuel Pump Pressure (

sashal 04-03-2006 10:56 PM

Fuel Pump Pressure
I have an 82' 300TD turbo and am getting ready to do an svo conversion on it. When I first got the car, a mechanic advised me to install an electic fuel pump and though i was with him when he did it, I did not know enough at the time to pay attention to the psi for the pump. I am going to test the pressure that it is putting out but I have a question about how much pressure I should be getting out of the pump.

I have read on this forum that the MB lift pump should be putting out 15 psi but then I have also read that when buying a facet pump, one should look for a pump that puts out 2-5 psi.

Why is there a discrepency between these two pressures?

If the pump that I have is putting out too high or two low a pressure, can this damage the IP?


bgkast 04-04-2006 12:34 AM

The 2-5 psi electric pump should be used to supplement the stock pump, not to replace it. It is used to help the more viscous oil along the lines. A pump that puts out too much pressure can, I believe, fill the crankcase with oil if the diaphragm in the stock pump fails, however the car will continue to run due to the electric pump operating.

Personally I just used larger than stock lines on my oil side of the system and am just using the stock pump. I may add a low-pressure pump near the tank in the future, but so far I have had no problems.

All times are GMT -4. The time now is 06:34 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website