Parts specialist DENSO has warned against the dangers of attempting injector repair in unclean conditions. The company says that when repairing or replacing these precision components it is essential to have the right conditions.

Due to the working clearances of 2 microns, cleanliness is crucial when it comes to repairing an injector. The capital investment for the facilities and testing equipment is extremely high, but necessary, to meet the exacting standards required.

To repair an injector it must be dismantled, cleaned precisely and then re-assembled in an air-conditioned, pressurised, clean room as even the smallest piece of dirt can contaminate a fuel injector’s nozzle which could cause it to stick in the open position. If this happens, the injector will leak fuel into the cylinder causing expensive damage to the engine.

To ensure workshops can guarantee a high quality repair of a DENSO injector, the parts manufacturer requires them to meet a stringent list of standards including investment in their facilities and testing equipments to ensure strict cleanliness in the area where the injector repair takes place

At present there are only two authorised DENSO injector repairers in Ireland, Diesel Injection Services and Diesel Engineering Services.

Genuine DCRI (DENSO Common Rail Injector) can be identified by the following:
-       First digit stands for injector type: 1 for 095000-, 2 for 295900-, 3 for 295050-
-       Second digit is filling digit
-       Basic part number of original DENSO part number

To ensure an efficient repair of a genuine DENSO injector while avoiding the risk of more costly damage to an engine, DENSO recommends only using its authorised injector repairers.