6 Cyl 603 DIY Fuel Injector Rebuild Kit

German-made by Wolfswerke-Sachsen.  imported injector nozzles are manufactured with new technology and they outperform the original Bosch design. They downright atomize the fuel better for more complete combustion. When these high-performance nozzles are installed and balanced-tuned properly, you will not believe the difference they make in how your diesel engine runs. Here is what one customer recently wrote in to report:

The kit we ship you will include the following items at cost savings:  Use the search box to look up each item to read more detail or purchase separately.

• Set of 6 new German High-Performance Nozzles with Heat Shields included
• Bench Mount Fuel Injector Pressure and Balance Tester that you can use at home (new flow through and capture bottle upgrade)
• 24 piece CUSTOM shim washer kit - required to adjust injector release pressure
• 3 pairs of nitrile gloves
• Video instructions on setting up and using our version 3 pressure tester

ADDED BONUS: As an added bonus, Kent Bergsma's complete PDF DIGITAL DOWNLOAD manual for cleaning, testing, and adjusting fuel injectors will be included at no additional cost. This guide will walk you through the procedures step-by-step in plain English. It will be automatically uploaded to your Mercedessource account upon the tester's purchase.

We are not including any tools with this kit as we know some of you may already have the tools needed to work on your fuel injectors. You will need a dial caliper to measure the thickness of your shims, a torque wrench, and the correct injector deep socket. We carry all these tools individually, or in a complete kit as pictured below.  Just type those names into the search box to view.

PLEASE NOTE: Our PDF and video instructions, as well as our older YouTube videos, will refer to these nozzles as Monark. They are no longer being sold under the Monark name, but are the exact same nozzle as we have sold over the years.

Also Note: We also offer a brass tool cleaning kit that is recommended, but not required, to rebuild your injectors. Look below to view and read more about the brass tool kit.

Still not sure you can do this yourself? Here is what one of our customers recently wrote about this rebuild kit:

Dear Kaia and Kent-

Kent has done it again! Another great DIY Kit...What a great package - The DIY Fuel Injector Rebuild Kit. The booklet covers everything in detail with good photos and diagrams. Being able to bench test and bench balance the injectors was a delight with Kent's test pump. The job went very smoothly and I think anyone with the right tools and this complete kit can do this job over the weekend.

By the way, the results are fantastic. My old bosh injector tips were coked over- I don't know how the car even ran with those! The new German tips are working very very smoothly with no banging (I am running 100% WVO- one tank system). The cost was insignificant compared with the results...

Thanks again for supporting us "car-crazy"  DIYers with another great rebuild-it kit.

Diesel Don

Our diesel injector anti-leak kit is included at no extra cost. This kit will make sure your injector halves don't leak when installing your new Monark nozzles. Instructions and tips are included.  

Note: If you would like to order this kit to solve a pesky leak on your existing injectord

Available - Gasoline Injector Pressure Tester Conversion!!!

If you own an older gasoline Mercedes you can use this basic tester to test your CIS fuel Injectors. BUT ...... you will need a conversion kit with a smaller gauge. Look below to view our new Diesel to Gasoline Tester Conversion kit

WARNING:The health and longevity of your new injector nozzles with be directly affected by the cleanliness of your diesel fuel and its lubricity. Any gunk or crude in your filters or injection pump could travel to the new nozzles and cause scoring leading to premature failure (our warranty does not cover nozzle tip scoring). The following procedures are a MUST with installing new nozzles:

1. Diesel Purge

Run at least one can (two if you have never done it) of diesel purge through your fuel injection system before removing your old injectors.

2. Change Filters

Change both your pre and main fuel filter. Use the search box to view all filters.

3. Use Fuel Additive

The new ultra low-sulfur  (ULSD) diesel fuel available at the pumps is not kind to mechanical fuel injectors. The sulfur was the key ingredient used to keep your fuel pump and fuel injectors lubricated. To protect your new nozzles we recommend you add a high grade fuel additive to your fuel (such as Lubro-Moly Diesel Hi-Test)