Injector removal help

Tomster · Jun 26, 2021

Hi all. Have just removed the nuts from the thread on the injector clamp and noticed on the threaded posts the spline top is sheared off on one side. Do these need to be removed to get injector out or will come out with them still in place? Injector is twisting side to side but need to obviously pull it up.any quick answers would be much appreciated.
Thanks in advance.

andyfreelandy · Jun 26, 2021

By splined top, I think you mean the torx head for locking them?

The injectors lift off over the stud so it can stay.
Bit late, but best done with engine warm and I always put a strip of metal to protect the plastic and spread the load and use a pry bar to lift each one out when clamp has been removed.

Tomster · Jun 26, 2021

andyfreelandy said:
By splined top, I think you mean the torx head for locking them?

The injectors lift off over the stud so it can stay.
Bit late, but best done with engine warm and I always put a strip of metal to protect the plastic and spread the load and use a pry bar to lift each one out when clamp has been removed.

Thanks for the quick reply. Engine was hot when I started, this is wher I’m at. Nuts are off clamp and injector twists from side to side.will the clamp just lift out with the injector if I can get something underneath to pry it up?

Tomster · Jun 26, 2021

andyfreelandy · Jun 26, 2021

Yes that is there to allow them to be tightened. I would assume the damaged one is tight!!

So, strip of metal on the black plastic under the injector connector where the fuel line goes, put a pry bar under, don't lift on the thread but close in to injector.

If any don't move up and come free you may have to reinstall, warm engine and try again.

Tomster · Jun 26, 2021

Cheers. Have intake manifold off, will I still be able to start it?

Tomster · Jun 26, 2021

Cheers matey…

Tomster · Jun 26, 2021

The copper washer even came out with it!Happy days so far….

Tomster · Jun 26, 2021

Any tips on stopping the copper washer dropping off when I put new injector in?

Arctic2 · Jun 26, 2021

To late for you now but may help others, clean out the port and around it without letting any debris fall into the port hole.

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If real stubborn then a slide hammer can be used.

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Always use a new copper washer.

Tomster · Jun 26, 2021

Arctic2 said:
To late for you now but may help others, clean out the port and around it without letting any debris fall into the port hole.

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If real stubborn then a slide hammer can be used.

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Always use a new copper washer.

Tomster · Jun 26, 2021

Can I just drop copper washer in the port before the injector or might it get stuck?

Arctic2 · Jun 26, 2021

A new copper washer should hold on the injector, if not then add a drop of diesel to the washer to hold it in place, then lower it into the clean port.

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Injectors can be cleaned and refurbished if you know what you are doing.

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Tomster · Jun 26, 2021

Do you reckon this was my problem?

Arctic2 · Jun 27, 2021

Tomster said:
Do you reckon this was my problem?

What effect were you having to make you remove the injector in the first place?

Tomster · Jun 27, 2021

Arctic2 said:
What effect were you having to make you remove the injector in the first place?

Rough idle,engine shaking and bad fuel economy. Disconnected each injector in turn and the dodgy one made no difference when disconnected. Have now replaced said injector and cleaned out intake manifold and ports. All I can say is it’s now like driving a different car. First time attempting anything like this and found it quite straight forward with help and advice from the good members on here.
Thanks all…

Arctic2 · Jun 27, 2021

great to hear you are sorted worth purchasing one of these to keep in your tool box, for the future

Diesel Flow Test Meter Adaptor Set Injector Common Rail 6 Cylinder Bosch Fuel | eBay

andyfreelandy · Jun 27, 2021

Glad you've cracked it and welcome to the band of self trained mechanics! They are the best type as the motivation, drive and focus is stronger than 'just doing a job'.

Tomster · Jun 27, 2021

Only nearly had one mishap. Placed new injector into the port then went to make a brew.when I came back out I noticed something on the floor…(copper washer)…it must have fallen off the injector without me noticing Good job I saw it or I would have put everything back together not realising it was missing Now that would have spoiled my dayAnyway, all is good and the old hippo is a pleasure to drive, can’t believe the difference. No more shakkkkkinnnng

paul99 · Jun 27, 2021

Injector grease could have been helpful in sticking the washer to the injector body. Search Ebay or similar for it. The Mercedes brand is possibly Febi Bilstein. I would likely go for the Febi, Mercedes or LiquiMoly brands, if I were buying some.

Injector removal help

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