Specializing in VW and Mercedes Diesel Fuel systems
Injector Nozzle replacement and/or Pressure Calibration
We perform Injector nozzle replacements and/or set the injector break pressures back to new specifications and tolerances. Unlike other shops that claim to be able to set "Break Pressure" we have the equipment to precisely set both Pilot and Primary break pressures in two stage injectors using a state of the art digital pressure test bench. This insures perfect and precise balance in respect to fuel pressure and the resultant quantity delivered to all cylinders. We start by completely disassembling and ultrasonic cleaning all internal components including the nozzles and needles. Ultrasonic cleaning insures all parts are completely stripped of varnish and gums which normally occur in all fuel systems and lead to degraded injector performance and flow imbalance. Injectors are then reassembled and the pressures are reset to new tolerances. After all pressures and spray patterns are set and evaluated the injectors are coated with a high temperature coating that protects the injectors from corrosion and improves the aesthetic value of your newly conditioned injectors.
High Pressures Require High Precision Hardened Steel Shims
We only use the highest quality precision lapped hardened steel shims from Germany. These are the same shims used to set the pressures when your injectors were first produced at the factory. We stock the complete range of shim thicknesses which permits us to accurately set any pressure desired without compromise. Unfortunately we have found failed shims made from much softer stainless steel used by other shops when they have attempted to set the break pressures. Often the well intentioned shops revert to "stacking" of multiple thinner shims on top of the original shim to achieve the desired thickness. Use of stainless steel shims results in flattening and eventual disintegration of the shim within the injector. The failure of the shim is due to the extreme pressures generated by the rapid cycling of the nozzles and their internal mechanisms. The resulting loss of shim thickness and failure of the stainless shims leads to the injector falling from the set opening break pressures resulting in poor fuel quantity control and increasd smoke output. Aside from pressures, the failing shims generate metal fragments that are free to circulate within the precision workings of your injectors and expensive high pressure fuel system.
Uncompromising quality and precision, Our promise to you
We treat every component as if it is going in our own personel vehicle. We take ownership of your components and insure the absolute highest level of precision and workmanship that goes into them. If we can't promise to do it right, we won't do it at all.
DBW