PeachParts Mercedes-Benz Forum - View Single Post - Oil Pressure Sender Replacement - 190E 2.3-16

JimSmith · #5 02-02-2005, 11:03 AM

We will be attacking the lack of apparent oil pressure this weekend and I was wondering if anyone had any hints to offer. I am planning on taking the filter out, and then looking at the various flow paths there might be for relief valves and thermostats to see if there is a chance one of them has gone bad too.

As my son noted, the old pressure signal sender had loose parts in it. If you just roll it around in your hand it clunks as something inside moves around and the new one did not. I am hoping the new one is not broken as well - if I cannot find another explanation, out it comes and we will see if it now has loose guts.

The manuals I have do not detail the oil system very thoroughly. If anyone can let me know if there is a pressure relief valve, and the overall oil flow path arrangement, it would be greatly appreciated. Other than the oil pressure signal being very alarming as it either sits at zero or floats around from 3 bar to 0.5 bar, there is no noise or vibration while the engine is running to suggest there is no oil flow.

I did look into the oil fill cap at the camshafts directly under the openning, and did not see a bunch of oil slinging around in there, but the oil temperature at the time was probably near 10 degrees F at that time, so the chances are there wasn't a lot of oil vapor or slinging going on anyway.

Without an indication of positive oil pressure this car is sitting around, which is driving my son nuts. It has been on the "disabled" list for a while with the old chain tensioner leaking oil profusely and allowing a great deal of chain slap at start up. Now, with the new chain tensioner in place, and obviously working as intended (no chain slap at start up whatsoever), this new problem is becoming very frustrating. Thanks for any hints you may have, Jim