My 1986 300SE is now back in business with good oil pressure. Turns out the reason why the oil pressure was low was a catastrophic failure of the oil pump itself. In the last part, I had narrowed the problem down to most likely being the pump. I assumed that something was either blocking the screen or the pressure relief valve was stuck. At this point it was time to take the car to a professional mechanic to have a look.
On the M103, the engine has to be raised to remove the one piece sump. Once the sump […]
