6 Cylinder 603 Monark Diesel Fuel Injector Nozzle (1)


Fits 300SDL 300D 300TD 300SD 350SDL S350D 1986 to 1993

6 Cylinder 603 Monark Diesel Fuel Injector Nozzle (1)

Product Details


  • 1 Injector Nozzle Included
  • No Instructions included
  • No Heat Shields Included
  • 12 month warranty provided on Monark Nozzles when all assembly precautions are followed

We want to help you get your diesel performing better. If your injector tips are worn out here are my recommended replacements. These injector tips are made by Monark in Germany and they are designed with a finer mist pattern than that produced by the Bosch tips. My experience has shown that these tips work better (fuel burn) especially on higher mileage diesels with less than perfect compression numbers. On my own diesels I have also noticed less injector nailing (pinging noise) with these tips installed.

Installation notes:  These nozzles fit 6 cylinder 1986 to 1991 126 and 140 chassis sedans and 1987 (only) 124 chassis 300D and 300TD. WILL NOT fit 1995 E300D!   If you would prefer our complete manual on injector cleaning and testing CLICK HERE.

Ideally you should pressure test and set the correct release pressure when installing new tips. If there is a Bosch repair facility near by you can have them do this testing/adjusting for you. You can install these tips without checking adjustment and in many cases they will fall into an acceptable pressure/spray pattern range. This might be preferable to badly worn out fuel injectors - but best to test pressures to know for sure.

NOTE: If you are running SVO WVO or B100 these have the highly touted DN OSD 261 specification. Many, including myself, have reported great results with these nozzles when running heavier viscosity fuel.

Heat shields washers should be changed everytime you replace an injector. They are NOT included with this nozzle. 

I recommend you have a torque wrench handy when rebuilding your injectors. If not we offer one at a great price. CLICK HERE to order.Use a torque wrench when cleaning or rebuilding injectors

This  injector nozzle DOES NOT include the Anti Leak Kit. CLICK HERE to order the Anti Leak Kit separately.