Mercedes Diesel Fuel Injector Balance Pressure Tester - Yes, You Can Do It Yourself!

You are looking at the worlds first production diesel mechanical fuel injector bench tester available in the U.S. for under $200. These are built at the Mercedessource shop to control quality and production demands. This bench mount pop tester will allow you to economically test the spray pattern and fine tune (balance) your fuel injectors at home. With the injector fitting included it will work on all Mercedes diesels from the early 1960s up to 1993. This includes chassis 110, 115, 116, 123, 126, 201 and 124 and models 200D 220D 240D 300D 300CD 300TD 190D 300SD 300SDL 350SD.

This tester is required for proper IDI (indirect injection) diesel fuel injector testing and overhaul. It will work on any mechanical Bosch type fuel injector with adjustable pressure release function - although you may have to come up with your own adapter to attach the injector to the pop tester. (manufactured up to the mid 1990s). Assembled with special FLUTTER GUARD pressure gauge to stabilize needle bounce. This will allow for more accurate pressure release readings during testing.

OVERSEAS CUSTOMERS: We can custom fit this tester in a flat rate US parcel box to save you money on air shipping. The tester is shipped with the gauge removed. If interested please email us for a shipping quote. You will not be able to checkout online with international shipping, but we are happy to sell you the tester and other supplies you might need.

If you don't think tuning and balancing your injectors is important think again. Dirty or worn injectors can cause poor spray patterns leading to loss of power, poor fuel economy and excess exhaust smoke. Unbalanced injectors (meaning release pressures are not set within 50 psi of each other) can lead to rough idle, poor acceleration, and excessive injector knock. Worn out injector tips can lead to all of the above plus lots of $$ going out your exhaust pipe. With diesel fuel at $3.00+ a gallon you could pay for this tester in a couple months!

IMPORTANT NOTE: Contrary to popular belief this is an important service procedure you can do at home. You will actually be surprised at how simple it is with the right tools. Even though it is not difficult, it can be time consuming to get the pressures of all your injectors balanced just right and that is one of the reasons diesel shops charge so much money to do it. Here is a quick summary of the procedure:

The testing procedure is quite simple:

• Bolt the tester to your work bench
• Fill the tester reservoir with diesel fuel
• Use face respirator - test outside or below exhaust fan at window to vent fumes
• Attach a fuel injector to the hard line fitting included
• Bleed the air out at the injector fitting
• Pump the handle a few times up to the point the injector fires (pops)
• Note the consistency of the spray pattern
• Read the release pressure in PSI
• Hold pressure with handle just before release point and check for injector leaks
• Disassemble the injector to inspect / clean (search injector cleaning kit)
• Select thicker or thinner shim washer to change pressure (search shim washer)
• Measure shims with dial caliper to confirm correct size (search dial caliper)
• Clean, oil, and reassemble injector to proper torque (search torque wrench)
• Repeat test and re-adjust pressure if needed
• Replace with new Monark nozzles if yours fail the test (search injector nozzles)
• Install back into your engine using new crush washers and injector return hose (search injector service kits)

ADDED BONUS: As an added bonus Kent Bergsma's complete guide to 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. This is an additional $18.95 savings.

Need more info? If you want to learn more about testing and adjusting procedures before you decide to purchase a tester just CLICK HERE to order the manual.

SPECIAL INJECTOR SERVICE TOOL KITS AVAILABLE: If you don't have the tools handy to work on your injectors we have put together a couple affordable tool kits. Basic requirements include the proper injector socket, a torque wrench, and a dial caliper to measure the shim washer thickness. You will be hard pressed to find better quality for the price we offer. Our markup on these tools is set very low just to help you get started working on your own fuel injectors. CLICK HERE to view our tool kits.

ALSO NEEDED: If you are going to properly change your injector pressure release settings you will also need a variety of shims. We carry shim kits on this site as well. CLICK HERE to view our selection.

MONEY SAVING COMPLETE INJECTOR REBUILD KITS ALSO AVAILABLE: If you are ready to rebuild your injectors and want to install our high performance Monark nozzles we offer complete DIY kits that include the pressure tester, new nozzles for your engine, and adjusting shims. These are currently available with special pricing. CLICK HERE to go directly to our rebuild kit listings.

NOW AVAILABLE - Gasoline Injector Pressure Tester!!!

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. CLICK HERE to view our Diesel to Gasoline Tester Conversion kit