Gasoline Parts

How to remove and install HPIV and HPP

Treating high-pressure injection valves properly enables them to be repaired effectively

Repair of high-pressure injection system components

Bosch supplies spare parts and special tools for the repair of the high pressure injection systems. ESI[tronic] Evolution gives a complete diagnostic sequence to be followed with installation instructions including measurement values, fault patterns and even signal images. With this sort of help from Bosch’s detailed instruction manual, spare parts and special tools, it is a relatively easy task to remove or replace high-pressure injection valves and combustion chamber seals.

Removal and installation of high-pressure injection valve (HPIV)

Read ESI[tronic] Evolution instructions carefully
Use appropriate tools to remove HPIV and replace the combustion chamber seal
Avoid damage to the valve tip (valve leakage)
Prevent the ingress of foreign bodies and dirt during installation
If the HPIV is to be reused, never use impact tools during the installation of the HPIV into the cylinder head
Do not apply oil or grease to the white Teflon seal
Apply a thin coat of clean, silicone-free engine oil to the blue seal before installing the fuel rail
When removing and reusing the HPIV, always replace the specified spare parts (service kits)