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. Other times you may install the injector only to find out fuel leaks out between the two halves. This can happen because the internal parts of the injector are damaged or worn out ( ie weak spring or scored or pitted center section). These parts are not available new and if you buy a used injector on eBay there is no guarantee these parts are any good.
Product Details
These parts have been inspected for wear and are in good condition. You will receive one original shim but it may not be the right size for your injector halves. We recommend you have an assortment of shims on hand the adjust the release pressure when installing these parts. See related products below:
The picture below shows what the "short" injector looks like and the associated parts need.
This picture shows the distinct difference between the short injector ( on the RIGHT ) and the long injector ( on the LEFT ). Make sure you order the correct parts for your style of fuel injector. NONE of the internal parts ( other than the nozzle ) are interchangeable.
Related Products:
Variable 26 Pc. Diesel Fuel Injector Pressure Adjustment Shim Kit
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.
4 Cyl 615 616 601 Mercedessource Diesel Fuel Injector Nozzles w/ Heat Shields
The Monark nozzles #120 are all gone, never to be remade. We do have a few hundred #128 nozzles still available. Kent and Kaia got together and started questioning why they would not work in the OM616 and OM617 engines.
5-Cylinder OM617 Mercedessource Diesel Fuel Injector Nozzles w/ Heat Shields
The Monark nozzles #120 are all gone, never to be remade. We do have a few hundred #128 nozzles still available. Kent and Kaia got together and started questioning why they would not work in the OM616 and OM617 engines. So in May of 2024 Kent decided to put them to the test.
1972 to 1987 Bosch Long Diesel Fuel Injector Critical Replacement Parts - Used
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.