Main Technics Repair Repair of a car Common Rail Bosch Injectors Cleaning

Common Rail Bosch Injectors Cleaning

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Thus we twisted off solenoid. The spring and the ring which were inside in solenoid showed in picture below.


Under the solenoid you can see upper part of back-valve’s mechanism:

Upper part of back-valve’s mechanism

I proceed to dismantle. Let’s twist off fuel pick-up fitting. It’s tightened a lot. Once again I hold injector with the wrench (12) and twist off fitting with the respective wrench. It is possible to blow its with carburetor cleaner. After this we put aside this one.

Twisted off fuel pick-up fitting

Further I remove three-lobe metal detail – this one is supported from the bottom with the spring and detail is located on the small braking clamp (you can see in the centre around the pivot. The designation of three-lobe metal detail is not clear to my regret.

Opened top of return valve

Now it is possible to access hiding earlier details. The screw can be seen with the external thread and internal hexagon. In order to twist off screw I did special appliance from coupling element (10) preliminary thread had been swirled on the 2/3 of coupling element’s length.

Myself made tool for unscrewing special nut

With the help of this device and wrench or with the help of the key-head 10 we twist off this screw. It is hard to move its but after this it is easy to twist its with the hand.

Untwist «special» nut
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24.04.2014 at 23:11 Samuel said:

You are a great man! Marvelous!

I never have seen more detailed report!

I spend all my afternoon to read your reports. And they are exelent.

Thank you very much for the good information and the good time I passed with!

13.12.2014 at 23:05 Mr. Magiroos said:

Perfect!!!! Super!!! This is just for my kind men. I just have to do things my self. One question.

Is there any rubber seals to change? Can you send me the factory code to order them. My problem starts from leaking upper line. I have chrysler voyager 2,4 crd. 2002 diisel. Many thanks!!!

14.10.2016 at 02:16 Scottie said:

Thank you for the detailed write up. Diesel injector rebuilding seems to be a dark art, with very little published on the internet. Your article is the most comprehensive I've seen. I purchased my valve balls from

Kit13315 1.3mm Loose Ceramic Balls G5 Si3N4 Bearing Balls $1.49 each

14.10.2016 at 11:03 George said:

Dear Scottie,

Thanks! Yes, it's some kind of dark art. Did you successful repair your injectors? As I know ball diameter is 1.34mm.

10.10.2017 at 03:10 Axallindo said:

Hi guest

I have clean all injector part and change a new seal and new nozzle but why after i use at my engine is always knocking in acceleration?

10.10.2017 at 03:10 Axallindo said:

Hi guest

I have clean all injector part and change a new seal and new nozzle but why after i use at my engine is always knocking in acceleration?

19.07.2018 at 21:15 Henry said:


Need your permission to translate this article in bahasa indonesia and upload it to my blog.



24.07.2018 at 19:28 George said:

Dear Henry,

I do not mind if you will translete the article and upload to your blog with link to the source.

REgards, George.

16.07.2019 at 16:34 Zox said:


Like Axallindo, I have cleaned injectors and put new seal and ball. Now I have knocking injectors on acceleration...

It looks like that injector must be adjusted with shims and take care about torque settings.

Pre-ignition paremeter is not good...