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

Common Rail Bosch Injectors Cleaning

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The ball I cleaned rolling it between two pieces of paper moistened in carburetor cleaner as far as it was impossible to take this one in hand and to clean it — the ball is very small. The ball housing (and this one is output orifice) I blow out from the cleaner balloon. The same I did with the input orifice (these are the same holes with diameter of parts of millimeter and through these holes the control chamber is filled in and pour out).

Inlet orifice

And all other details have to be cleaned in order to remove deposits.

After cleaning let’s start to assembly operation and there is continuation of all the details of injector:

Sequence of all details of injector
Sequence of nozzle details of injector
Sequence of return valve details of injector
Sequence of solenoid details of injector

Injector’s Assembly

If after the assembly injectors are not being put in engine and start running then you have to lubricate all details. It is better to do this diesel fuel – this is native liquid for its. But for example the liquid key is possible as well. In extreme case sunflower oil will suffice. The main reason for this is that dry details inside injector will not be touched with the corrosion.

First of all we put pivot and control chamber. It is necessary to put its inside package but peculiarity is that the hole on the valve side must be opposite of input hole on the inside package of injector. Otherwise the fuel will not to fill in chamber of back-valve and not to pour out when the valve opening. Under these conditions the injector will not start running.

Hole inside injector's housing

We remember the location of symbol of control chamber end opposite to the input orifice. We see on injector’s package and we locate it so that input fuel hole would be from the top precisely. After that we just put out pivot with chamber in right orientation remembering mentioned above symbol.

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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...