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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). To fix this high pressure leak requires taking the injector apart and "lapping" the mating surfaces. Seal is by metal to metal contact. There is no o-ring or gasket inside the injector.

This kit includes three grades of fine sandpaper and complete lapping instructions. In some cases of very slight fuel seepage a special anerobic sealant can be used to stop the leak without taking the injector apart. We include a small tube of this special sealant along with tips on how to use it successfully!

This little inexpensive kit is guaranteed to save fuel and put a smile on your face!

Troubleshooting an annoying shift problem must first start with the vacuum modulator. This vacuum control unit mounted on the side of the transmission must be tested and adjusted to specs BEFORE you move on to other adjustments. Unfortunately this can not be done by guess or by feel. There is a pressure port on the side of the transmission that you must tap into and connect to a pressure gauge. The engine must then be started and the modulator adjusted to a set pressure for that specific transmission. It is not a difficult job with the proper test tools and information, and can be done in less than an hour. Too much pressure and abrupt shifts will occur. Too little pressure and you may experience slipping or flaring during shifts. My kit with help you do all the above with ease.

Brand new coolant pipe for early 123 chassis diesels. Located on the water pump housing. Will fit some later models but please email with vin number to confirm fit.

Welcome to the first inexpensive CIS fuel injector tester for the home mechanic. This bench mount tester will allow you to check the release pressure and spray pattern of your injectors. It will not accurately measure quantity of fuel delivered nor the release balance between the injectors as do the big commercial test units. With a little practice you can get a "feel" for balance by quickly testing all injectors one right after another and analyzing spray patterns. CIS injectors are spraying all the time in your engine. There is no way you can get this hand pump to spray continuously, but by pumping rapidly and can get a fairly good idea just how well each injector is atomizing the fuel. 

With this conversion kit you can use your current Mercedessource diesel fuel injector tester to test Bosch gas engine fuel injectors on 450SL, 380SL, 560SL, 280E, 280CE, 280SE/L,450SE/L, 380SE/L, 500SE/L, 380SEC, 420SEL, 560SEL, 560SEC, 300SE/L, 190E 2.3, 190E 2.6, 260E, 300E, 300TE, 300CE, 300SL, and 500SL.

Bushing that holds fuel injector into the head of the engine. These get very brittle with age. If you are planning on removing your fuel injectors I highly recommend you order these to have on hand. Even if you only plan to remove and clean your injectors there is a good chance you may break one or more of these holders. Retail price $6.00 ea.

Holder includes outer 0-ring seal but does not include seal bushing at the top of the injector. These also be hard and lose their seal with age. Failure can cause high speed idle and rough running. CLICK HERE to order these seals separately.

Now available as a cost savings kit! Eight new Bosch CIS fuel injectors with eight holder bushing O-ring seals. If your 1986 to 1991 8 cylinder has over 120,000 miles and you think your injectors are ok then you might want to think again. I have been amazed with the poor results of our recent testing of large number of fuel injectors from various gas engine models ( 1977 to 1993). Less than half of those injectors tested passed a simple spray pattern and leak test. Unlike diesel injectors there is no way to take them apart, adjust, or rebuilt them. It is possible to send them out for ultrasonic cleaning but in cases where cleaning does not help your only option is to replace them.

Now available as a cost savings kit! Eight new Bosch CIS fuel injectors with eight holder bushing O-ring seals. If your 1977 to 1985 8 cylinder has over 120,000 miles and you think your injectors are ok then you might want to think again. I have been amazed with the poor results of our recent testing of large number of fuel injectors from various gas engine models ( 1977 to 1993). Less than half of those injectors tested passed a simple spray pattern and leak test. Unlike diesel injectors there is no way to take them apart, adjust, or rebuilt them. It is possible to send them out for ultrasonic cleaning but in cases where cleaning does not help your only option is to replace them.

Now available as a cost savings kit! Six new Bosch CIS fuel injectors with six holder bushing O-ring seals. If your 6 cylinder 103 engine has over 120,000 miles and you think your injectors are ok then you might want to think again. I have been amazed with the poor results of our recent testing of large number of fuel injectors from various gas engine models ( 1977 to 1993). Less than half of those injectors tested passed a simple spray pattern and leak test. Unlike diesel injectors there is no way to take them apart, adjust, or rebuilt them. It is possible to send them out for ultrasonic cleaning but in cases where cleaning does not help your only option is to replace them.

Now available as a cost saying kit. 4 new Bosch CIS fuel injectors. If your 190E has over 120,000 miles and you think your injectors are ok then you might want to think again. I have been amazed with the poor results of our recent testing of large number of fuel injectors from various gas engine models ( 1977 to 1993). Less than half of those injectors tested passed a simple spray pattern and leak test. Unlike diesel injectors there is no way to take them apart, adjust, or rebuilt them. It is possible to send them out for ultrasonic cleaning but in cases where cleaning does not help your only option is to replace them. If you can't get them properly tested you may not be sure of the results and in the end just wasted time and money for cleaning.

Brand new 02 Sensor removal socket. 3/8" drive with 22 mm 12 point open head. Fits Mercedes 201 190E 2.6 ONLY and 124 chassis 260E 300E 300TE from 1984 to 1990.

02 sensor replacement is one of those neglected maintenance items. They really should be replaced every 100,000 miles for peak engine performance. If left in too long they seize in the threads and are impossible to remove with a standard open end wrench. This special socket will remove even the most stubborn sensors. 

We also sell a universal Bosch 02 sensor for above models at a great price! CLICK HERE to view sensor.

Socket works due to a cutout that will allow you to slip it over the wire harness:

This is the part you need when your ignition key continues to stick even after installing a new tumbler assembly. In over 70 percent of the cases involving a severely sticking key, I have found you need to replace both the tumbler AND the steering lock if you hope to have a lasting repair. They tend to wear each other out if the problem is not corrected early on. In cases where the key just begins to stick slightly while turning, you can sometimes get by only having to replace the tumbler assembly.

This is the part you will need when your ignition key continues to stick even after installing a new tumbler assembly. In over 70 percent of the cases involving a severely sticking key, I have found you need to replace both the tumbler AND the steering lock if you hope to have a lasting repair. They tend to wear each other out if the problem is not corrected early on. In cases where the key just begins to stick slightly while turning, you can sometimes get by only having to replace the tumbler assembly.

Fits all the following models listed below from 1977 to 1991