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Mercedes installed small fuel warmers on these engines using engine coolant to warm up the fuel just before it enters the injection pump. The idea is great - especially in cold climates, but in moderate and warmer climates it is probably not needed.
While working on the fuel injectors of a 240D this week, Kent finally decided he had had enough. After 20 years of fighting those fuel injector return hoses he decided he just had to come up with a tool to make the job easier. 2 hours later the tool was designed and the prototype made.
Leaking fuel injector pumps have become a very common problem in the 60x. engines produced from the mid 1980s to the mid 1990s. The early 60x.
This is a common occurrence as these gas engines with Bosch C.I.S. fuel injection age. Most of them are now at least 20 + years old. The problem goes something like this. You start the engine cold and it will hardly run. It runs rough and idles very low and will even quit a few times.
If you think CIS fuel injectors can just be ignored, think again. Sure, your gas engine will continue to start and run “ok”, but you may find that it is not producing the power it once did nor the fuel mileage it once delivered.
Works on all models from 1977 to 1993 with the Bosch C.I.S Fuel Injection system - see models listed below: Now you can do it yourself on the bench with this inexpensive tester- Save big $$. Ever wonder how well your old CIS fuel injectors are working?
If you smell fuel inside your engine compartment you need to find the source of the leak and fix it IMMEDIATELY. I think we have all personally seen or seen pictures of those cars with the engine burning on the side of the road. Yes, usually caused by a fuel leak close to the engine!!!
For all MBZ diesel engines 1950 to 1999. Designed by Kent Bergsma. These are built at Mercedessource to control quality and production demands. Each one is tested here in our shop before shipping.
Kent shares with you 3 key steps that you should consider doing to get your old fuel injected 6 and 8 cylinder engines running properly. These include:
After completing the pressure test on your CIS engine, you discover a problem. But how can you find out how to isolate and fix it? This is going to require some research on your part. Start by learning how the system works and how each component plays a part.
In this video, you will see how the gauges are hooked up to a 560SL and how the pressures are read. The length of this 30-minute shows the detail Kent has put into filming all the critical components of doing a KE-Jetronic fuel system pressure test.
This video is specific to K- jetronic fuel-injected engines from 1976 to 1985. This includes the 350, 450, and 280 engines in the R107, W116, W123, and early W126 gas Mercedes. In this 29-minute video. Kent will show you how to hook up the gauge, run the fuel pumps, and complete the test.
There are a few factory recommend procedures and tests you should do before you do an actual pressure test on a CIS fuel-injected engine. In this 20-minute training video, Kent will walk you through these procedures step-by-step.
To do proper system testing on CIS fuel injection, you must find a way to get the fuel pump or fuel pumps to run continuously without the engine running. This can not be done by just using the ignition key. In this 15-minute training video, Kent will show the options available to do this.
This video will help you decide if you want to try to do a fuel pressure test yourself. It is a fairly simple DIY job but will all the confusion and misinformation on the internet; one would believe it is a complicated process that is hard to understand.
In this 9 minute instructional video, Kent will explain how to test your fuel accumulator to determine whether or not it has failed internally. A failed accumulator will make your engine hard to start when hot.
New Mercedes o-ring as shown. Always replace this seal when removeing and cleaning your fuel tank strainer ( screen ).
You would be amazed at how much fuel can leak out of a fuel hose when you disconnect it from your tank or engine. This is an easy way to prevent messy spills.
When “rebuilding” an old Bosch mechanical fuel injector, replacing the nozzle is usually enough get it working again at peak performance. But sometimes you will run into a fuel injector that just won't fire right nor product a correct fan spray pattern.
Most 1988 to 1993 6 cylinder CIS fuel injection delivery (FID) systems are old and tired and have not been properly maintained. These include the W201 190E 2.6, the W124 260E 300E, 300CE, 300TE, the W126 300SE, and 300SEL, and the R129 300SL.
Those old hardened and discolored plastic fuel hoses in your diesel engine compartment probably need to be replaced. When they crack and break you can dump a ton of fuel out on the road before your engine quits and leaves you stranded.
This on-demand instructional video was filmed to go with Kent's new fuel tank sending unit service kit launched in June of 2020. This is not a complete video on the subject of fuel level sending units. For the complete video see related products below.
If your fuel gauge stops working or is not reading accurately, many times it can be repaired by removing it from the fuel tank, taking it apart and giving it a good internal cleaning of the contact points, float shaft, and wires.
In this video, Kent will show you how to safely and cleanly remove the fuel from the tank on your older Benz. You will need to drain the fuel anytime you replace the back end hoses, the tank filter screen, the fuel pump or the fuel filter.
This is a "must-have" kit when adjusting release "pop" pressures on older diesel mechanical fuel injectors. It is the internal spring "shim" thickness that determines the exact pressure required for the release of fuel at the tip of the injector.
If you acquire an older Mercedes diesel and want to test those large Bosch injectors with your V3 gasoline bench tester, you will need 4 things to complete the conversion: 3000 PSI gauge, our new capture bottle to hold the larger injectors, injector sealing kit, and Kent’s written manual and vid
We know that many of you own multiple Mercedes, including both gas and diesel models. If you own one of Kent’s fuel injector pressure testers you no doubt will want to test all your applicable mechanical fuel injectors in both types of older engines.
In this short video, Kent will give you an overview on setting up and using Version 3 of his bench mount CIS gasoline injector pressure tester.
This video is specifically for setting up and using Kent's newest version of his diesel fuel injector bench mount tester. It does not contain any information on the actual process of cleaning or rebuilding a fuel injector.
This 24 minute on demand training video comes with our injector back flush cleaning kit. You can purchase this video separately, but please keep in mind you will not have any of the tools or supplies to complete this procedure yourself.
With these old gas fuel injectors, sometimes you just have to "back flush" the insides to restore them to peak performance. There is no guarantee that back flush cleaning will restore every old gasoline mechanical fuel injector. Some are just plain worn out.
This is a collection of SPECIAL tools Kent has put together to help you grab, twist, and pull on things in and around your Mercedes. He makes each one of these tools right here in his shop.
Fits the following: These nozzles fit 1986 to 1993 603 Engines and 1987 (only) 124 chassis 300D and 300TD. Also fits 1994-1995 S350 ONLY. This is the critical inside wear part of the injector that delivers the fuel spray into the cylinder.
This unique tank not only functions as an emergency fuel tank, but it can also serve to help troubleshoot diesel engine performance problems as well as complete a clean and efficient diesel purge.
33 page digital PDF manual. Applies to all 110 115 116 123 126 201 124 140 diesels from 1961 to 1994. From my many years of working professionally on Mercedes diesels I have learned fuel injectors are the single most neglected maintenance item. I believe there are a number of reasons for this.
This repair guide covers all 124 sedans and wagons 260E, 300D, 300E, 300TD, 300TE, 400E and 500E 1986 to 1993. Removing a 124 chassis sedan or door panel and doing related door maintenance and repair are all fairly easy jobs for the do-it-yourselfer.
I have used a lot of different clamping tools over the years to prevent fluids from leaking out when removing coolant, fuel, or brake fluid hoses. Most work ok. Some are hard to use in tight places. Many do not stop every last drip from coming out of the hose.
We receive a large number of emails from customers complaining about small fuel leaks at the fuel injector housing (coming out the threads between the two halves)and how best to seal them. To fix this high pressure leak requires taking the injector apart and "lapping" the mating surfaces.
If you work around your Mercedes much this is a great tool to have. The quality is exceptional for the price. It will reset to measure in both inches and millimeters. A Must Have for Ajusting Diesel Fuel Injectors 190D 200D 220D 240D 300D 300CD 300TD 300SD
Fits the Following: Late 126 201 124 chassis, Gasoline Models only! 1982-1983 380SEC, 1984-1985 380SE, 1984-1985 500SEL, 1987-1993 190E 2.6, 1986 to 1989 300E, 1990 -1993 300E 4matic, 1990-1992 300CE, 1988-1991 300SEL, 1992-1993 400E, 1986-1991 420SEL, 1986-1991 560SEL / SEC.
Leaking fuel injector pumps have become a very common problem in the 60x. engines produced from the mid 1980s to the mid 1990s. The early 60x.
Fits all diesel Sedans AND coupes only from 1977 to 1999 (Does not fit wagons!) including chassis 116, 123, 126, 201, 124, 140 and 210 chassis. 190D 240D 300D 300CD 300SD 300SDL 350SD 350SDL 300D 2.5 and E300D 1977 to 1999. This is an important maintenance item.
WORKS ON THE FOLLOWING All diesel 110, 115, 116, 123, 126, 201, and 124 chassis. 190D, 200D, 220D, 240D, 300D, 300CD, 300TD, 300SDL, 350SD, 350SDL, E300D.When it comes to diesel engine performance this is your best bang for the buck.
Here is a set of three straight inline fuel pre filters with strong plastic nipples and reinforced housing that fit 8 mm or 5/16 fuel hose.
PLEASE NOTE: WE SHIP EITHER FEBI OR HENGST AND COLOR OF FILTER SCREEN CAN VARY, DEPENDING ON WHAT IS AVAILABLE.
FITS THE FOLLOWING, ALMOST all EARLY 124 chassis 300E SEDANS 1986-1989 Only.Part number 002 545 27 05. 10 PIN plug. Be certain this part number matches your old one before ordering. This little unit has been proven to be the single most common reason for the 300E to just quit.
Applies to all Mercedes: Pre 1960, 190SL, 110, 111, 112, 113, 114, 115, 108, 109, 107, 116, 123, 126, 201 and 124 chassis. If you ever need to replace a fuel tank, fuel pump, fuel filter, or fuel hose and don't want the fuel running down your arm here is the tool and will save the day!
