1990 300D Air blowing out of rim of injection port???
I noticed, recently, that there was what sounded like an exhaust leak in the engine compartment of my 1990 300D 2.5 turbo. In checking further, I found that the noise was on the intake side of the engine not the exhaust side. Checking further, I found that puffs of air(?) were coming out of a small half-moon shaped hole on the rim of the injection port of the last fuel injector (closest to the firewall). I bought your injector rebuild/test kit (monarch nozzles) and rebuilt all of the injectors and reinstalled them.