I am curious. What is the actual improvement that you gained by replacing your old pump with a new one, and what was the 'scary level' that you had before? Do you now get a constantly pegged 3 bar reading, or is it still low at idle when the engine has reached operating temperature?
When I had at first not visually inspected the ~$250 OEM part, but was experiencing gradually subsiding oil pressure on test runs in my W126 (above idle speed), I figured that it might be an electrical pump, which was getting tired. Once I opened the oil pan, I saw that it's a mechanical pump, however, and further inspecting it's innards, did not reveal any parts that should wear excessively considering that it's one of the components benefiting from oil the most in the lubrication system, since it's closest to the source. If memory serves me right, there are only two gears inside of the pump that are actually responsible for creating the oil flow.
I ended up cleaning the pick-up filter and serviced the pressure relief valve, which had become sticky. I know have a pegged indicator @ cruise speeds, and 1.0-1.5 @ idle speed.
What type of oil pressure improvements did you experience with the new pump?
Glad to hear that there are enough users on this board that are not afraid to DIY, instead of adding substantial labor fees to the purchase cost of relatively expensive parts (relative to domestic brands).
When I had at first not visually inspected the ~$250 OEM part, but was experiencing gradually subsiding oil pressure on test runs in my W126 (above idle speed), I figured that it might be an electrical pump, which was getting tired. Once I opened the oil pan, I saw that it's a mechanical pump, however, and further inspecting it's innards, did not reveal any parts that should wear excessively considering that it's one of the components benefiting from oil the most in the lubrication system, since it's closest to the source. If memory serves me right, there are only two gears inside of the pump that are actually responsible for creating the oil flow.
I ended up cleaning the pick-up filter and serviced the pressure relief valve, which had become sticky. I know have a pegged indicator @ cruise speeds, and 1.0-1.5 @ idle speed.
What type of oil pressure improvements did you experience with the new pump?
Glad to hear that there are enough users on this board that are not afraid to DIY, instead of adding substantial labor fees to the purchase cost of relatively expensive parts (relative to domestic brands).
