Welcome Guest [Log In] [Register]
Photobucket
Welcome to Mercedes-190.co.uk

We are the Mercedes 190 owners forum, the place to be for all owners and fans of the Mercedes 190E, 190 and 190D cars. Including Cosworth (2.3 16v and 2.5 16v), EVO 1 and EVO 2 models. Modified and concourse, track cars and daily drivers, all are welcome.

This free UK based forum was started back in November 2005 to serve the Mercedes 190 W201 community and now has over 9000 members from all around the world and 600,000 + posts.

The members welcome you and encourage you to stay a while and have a look around.
We offer you friendly chat and access to some very useful information as well as tutorials with photos and videos for many common repair and maintenance jobs.
Whatever your needs there is a good chance you will be able to find what your looking for. Such as our Mercedes 190 buyers guide

Sign up to gain access to all areas including for sale / classified areas and country wide meetings and events. Many forum features and sections are only available once you sign up.

Join our forum at mercedes-190.co.uk!

If you're already a member please log in to your account:

**New members signing up**
please check your junk mail for the email authorization email
otherwise we cannot verify your new account.
I have noticed a lot of unauthorized accounts in the system.
Regards
Admin

Username:   Password:
Add Reply
Injector Removal And Refitting; a small guide
Topic Started: Thu Nov 8, 2007 2:56 pm (25,358 Views)
Desmoboy
Member Avatar
Part of things
[ *  * ]
I was just about to post a qustion about how to get these old seals off, even took some photoes to put up. Thanks for this pictorial explanation,brilliant !
Offline Profile Quote Post Goto Top
 
Klasse1190
Member Avatar
Old Skool Motors
[ * ]
Cheers for the info everyone. Just passed 150K so think new injectors next project.
Offline Profile Quote Post Goto Top
 
stwat
Member Avatar


Nice to see my pictures are back up :) They went missing for quite a while after photobucket messed around and updated their site "before"
Offline Profile Quote Post Goto Top
 
mexicopaul
Member Avatar
Part of things
[ *  * ]
Great post this about injectors,i have just ordered 4 new injectors plus seals for my 1.8,its running OK but not 100% as it should so hoping this sort it out,its got 120 thou on the clock now.Paul
Offline Profile Quote Post Goto Top
 
gibpetrolhead
Member Avatar
Racing line
[ *  *  *  *  *  *  *  *  * ]
You'll notice a difference with the new one's in place Paul, also remember the k-jet will need a tweek. :)
Offline Profile Quote Post Goto Top
 
chevy
Newbie
[ * ]
kentronix
Sat Oct 17, 2009 4:15 pm
I have just done this job on my m103 (same as a 2.6). Pretty easy job to be honest, took about 40 minutes. Stwats description was perfect for me, I used an allen in a socket rather than a bent allen bar. It means with an extension I just about got them all off without removing the pipes from the fuel distributor.

If you are reusing the seals (like I did) you will want to remove them without damaging them. This is my method.

2 mole wrenches (vice grips), the larger one is clamped down tight. The smaller one is not tight at all, its just to push on the seal, its not actually gripping anything.
Posted Image

Some were relatively easy, and pulled off with a bit of force.
Posted Image

Some involved a foot. The foot is not applying pressure, its just there to hold the wrench in place, its the pulling with my hands doing the work. This is important otherwise you will kill the seal when it comes out and you crush it with your foot :) Any foot will do, I chose to go with my left foot as I couldnt find my right one at the time.

You could use a vice or something if you have one.
Posted Image

And slip the seal back on the new one. They are rubber seals and not under a huge amount of pressure, if they are in good condition I see no reason why you cant re-use them. They are only 75p each but I didnt want to wait for them to arrive.
Posted Image

I noticed a smoother idle and definate power increase at the top end, above 5000rpm. Mid range may have been sharper but if so it was quite subtle. Above 5k it was obvious.
sorry to bother u, dont know how to post a question yet.
HELP, not getting any feul to my injectors, any ideas, feul is reaching distribution unit. car has sat for a while and i have just put engine and box back in car . any help would be grateful.Tony
Offline Profile Quote Post Goto Top
 
mexicopaul
Member Avatar
Part of things
[ *  * ]
Just fitted the new injectors plus seals,what an easy job thats is.on my 1.8 it had a 14mm bolt instead of the allen bolt.wish i had done it before now.
What is the correct way to reset the ECU for the re-learn process.Is it just disconnecting your battery and reconnecting it????.Paul
Edited by mexicopaul, Sat Apr 16, 2011 9:16 pm.
Offline Profile Quote Post Goto Top
 
stwat
Member Avatar


There is no need to reset the ECU Paul. They are very basic on these cars and will happily run even with the ECU disconnected.
Offline Profile Quote Post Goto Top
 
gibpetrolhead
Member Avatar
Racing line
[ *  *  *  *  *  *  *  *  * ]
Paul you may want to have it connected to a Co2 analyser to check its not running too rich or too lean with the new injectors. :)
Offline Profile Quote Post Goto Top
 
matteus
Newbie
[ * ]
I wonder if there is any difference in size (amount of cc) between injectors of e.g. a 2.0, 2.3, 2.6, 16-valver...

I have a 190E with a 2.3 8-valve engine with turbo-kit. I want to buy new injectors, but I'm wondering if there are any options to put in bigger injectors from another engine. Having A/F ratio problems (knocking), I would want to try this if possible.


Offline Profile Quote Post Goto Top
 
Richy190E
Member Avatar
bubble bubble
[ *  *  *  *  *  * ]
They are all the same IIRC.
Offline Profile Quote Post Goto Top
 
matteus
Newbie
[ * ]
Too bad. :(

Any (non OEM) alternatives you guys know of?
Offline Profile Quote Post Goto Top
 
stwat
Member Avatar


The only way to 'upgrade' the fuel system in these cars is to remove the system and replace with EFI or similar.
Offline Profile Quote Post Goto Top
 
gibpetrolhead
Member Avatar
Racing line
[ *  *  *  *  *  *  *  *  * ]
matteus
Mon Sep 19, 2011 7:55 pm
Too bad. :(

Any (non OEM) alternatives you guys know of?
You can get them off ebay periodically and there much cheaper. :)
Offline Profile Quote Post Goto Top
 
twopointsix
Addicted
[ *  *  *  * ]
This weekend I plan to replace the fuel injectors on my '89 M103 engined 2.6. The tutorial on here is very useful, thank you. I've already got the injectors and new black seals, but the Mercedes EPC (which I suspect is a "one size fits all" for both M102 and M103 engines) shows this

Posted Image

Sorry about the quality, but I'm trying to identify the following and work out if my engine has these and if so what needs replacing

Item 14 Guide & guide tube - does the M103 have these?

Item 17 - Insulation: as I understand it this is only on engines from 1983-1988 so should be substituted with......

..........Item 17 - Bushing

Item 20 - Seal ring - Do I need these?

Many thanks in anticipation. Apologies for any seemingly daft questions, but I don't want to make a start and then find I'm missing something vital.
Offline Profile Quote Post Goto Top
 
matteus
Newbie
[ * ]
gibpetrolhead
Mon Sep 19, 2011 9:56 pm
matteus
Mon Sep 19, 2011 7:55 pm
Too bad. :(

Any (non OEM) alternatives you guys know of?
You can get them off ebay periodically and there much cheaper. :)
You mean OEM spec injectors (but not from MB), or actually upgraded injectors suitable for our engines?


Offline Profile Quote Post Goto Top
 
gibpetrolhead
Member Avatar
Racing line
[ *  *  *  *  *  *  *  *  * ]
matteus
Fri Sep 23, 2011 3:36 pm
gibpetrolhead
Mon Sep 19, 2011 9:56 pm
matteus
Mon Sep 19, 2011 7:55 pm
Too bad. :(

Any (non OEM) alternatives you guys know of?
You can get them off ebay periodically and there much cheaper. :)
You mean OEM spec injectors (but not from MB), or actually upgraded injectors suitable for our engines?


The ebay ones are Bosch which I have bought and fitted on a valver and are the same as the ones that MB sell.
Offline Profile Quote Post Goto Top
 
gibpetrolhead
Member Avatar
Racing line
[ *  *  *  *  *  *  *  *  * ]
Heres the injector threads.

http://mercedes-190.co.uk/topic/6636812/

and

http://mercedes-190.co.uk/topic/6624881/

They have got dearer when I bought mine it was £14 each. :(
Offline Profile Quote Post Goto Top
 
gibpetrolhead
Member Avatar
Racing line
[ *  *  *  *  *  *  *  *  * ]
Twopointsix I'm not sure about the 2.6 engine but I know there are no guide tubes, PM 'stwat' he can help you with any questions.
Offline Profile Quote Post Goto Top
 
twopointsix
Addicted
[ *  *  *  * ]
Thanks gib, I was pretty sure there were no guides, so you've just confirmed it.
Offline Profile Quote Post Goto Top
 
matteus
Newbie
[ * ]
Thanks for the ebay-link, Gib! I'll surely look into those...
Offline Profile Quote Post Goto Top
 
twopointsix
Addicted
[ *  *  *  * ]
Thanks to peelywally, a most talented, highly experienced, dare I say "braw" (some might even say ruggedly handsome) Scottish amigo -fitted new injectors, seal rings & bushings to my M103 engined 2.6. To clarify a few points which I think others may have either missed, misinterpreted or got wrong......

For those who claim the M103 doesn't have an injector guide tube - well mine did! See photo below

Posted Image

from left to right: 1: old injector, with old rubber bushing still in place 2: plastic guide tube, 3: new seal ring (part number A103 997 0045), below that - the new rubber bushing (A103 070 0054), and far right, new injector.

Removing the 5mm hex bolt proved much easier with a longish 5mm allen key and another 5mm allen key with the angle cut off, i.e making a straight allen key, and undone with a small ratchet: see pic below

Posted Image

On the middle three cylinders, access to the 5mm bracket bolts was much easier by first completely removing the injector pipes from the fuel distributor - taking care to blank off the screw holes in the fuel distributor with masking tape to prevent the ingress of any dirt. The plastic guide tubes slide into the alloy of the cylinder head and have a thin rubber seal ring sitting in a groove about half way down. The seal rings were gently prised out and replaced with new ones. £5.40 for six seals from the dealership - not worth keeping the old ones at that price. Everything was given a good clean before anything new was fitted.

To be brutally honest - peelywally did all the work whilst I made the tea.

Hope this clarifies the situation.

Edited by twopointsix, Sat Oct 1, 2011 7:14 pm.
Offline Profile Quote Post Goto Top
 
peelywally
Newbie
[ * ]
Nice write-up 2.6. Did you do all that yourself? Remarkable! By a strange coincidence I have a ratchet and allen key arrangement like that at my place.

Ahem :wub: I would draw the line well before the 'ruggedly handsome'. however, you do make a nice cup of tea. :lol:
Edited by peelywally, Sat Oct 1, 2011 9:10 pm.
Offline Profile Quote Post Goto Top
 
gibpetrolhead
Member Avatar
Racing line
[ *  *  *  *  *  *  *  *  * ]
twopointsix
Sat Oct 1, 2011 4:57 pm
Fitted new injectors, seal rings & bushings to my M103 engined 2.6. To clarify a few points which I think others may have either missed, misinterpreted or got wrong......

For those who claim the M103 doesn't have an injector guide tube - well mine did! See photo below

Posted Image

from left to right: 1: old injector, with old rubber bushing still in place 2: plastic guide tube, 3: new seal ring (part number A103 997 0045), below that - the new rubber bushing (A103 070 0054), and far right, new injector.

Removing the 5mm hex bolt proved much easier with a longish 5mm allen key and another 5mm allen key with the angle cut off, i.e making a straight allen key, and undone with a small ratchet: see pic below

Posted Image

On the middle three cylinders, access to the 5mm bracket bolts was much easier by first completely removing the injector pipes from the fuel distributor - taking care to blank off the screw holes in the fuel distributor with masking tape to prevent the ingress of any dirt. The plastic guide tubes slide into the alloy of the cylinder head and have a thin rubber seal ring sitting in a groove about half way down. The seal rings were gently prised out and replaced with new ones. £5.40 for six seals from the dealership - not worth keeping the old ones at that price. Everything was given a good clean before anything new was fitted.

Hope this clarifies the situation.

Sorry if have given you the wrong infomation twopointsix, everything in you write up looks the same as the valver setup except for the guide tubes which on the valver look like this.

Posted Image
Offline Profile Quote Post Goto Top
 
twopointsix
Addicted
[ *  *  *  * ]
Nice write-up 2.6. Did you do all that yourself? Remarkable! By a strange coincidence I have a ratchet and allen key arrangement like that at my place.

Write up now suitably amended! Thanks to peelywally who is a gem.
Offline Profile Quote Post Goto Top
 
mchell
Part of things
[ *  * ]
Hi

Does anyone knows if these seals ( http://www.ebay.co.uk/itm/290472925873?ssPageName=STRK:MESINDXX:IT&_trksid=p3984.m1436.l2649 ) would fit in the injectors for a 2.6? They say M102, but aren't they 'one size fits all'?

Also, which size of wrench is used on the injectors and the tubes from the fuel distributor?

Cheers
HC

Offline Profile Quote Post Goto Top
 
barretts02
Part of things
[ *  * ]
Richy190E
Sat Sep 17, 2011 5:57 pm
They are all the same IIRC.
Can anyone confirm this?
seems strange that the same injectors are used on a 1.8 and then also on a 2.5-16v and a 2.6 I6. But then again they are just brass tubes I suppose.
Offline Profile Quote Post Goto Top
 
Paulossie
Member Avatar
Potato

Yes they are definitely all the same, go to ebay and look for Mercedes 201 injectors and they are all listed along with the Ferrari cars
Offline Profile Quote Post Goto Top
 
stevie w
Part of things
[ *  * ]

Cossie connoseur,
Thanks for excellent tutorial on changing fuel injectors, Gave me the confidence to have a go on my 2.0 m102 sportline.
Really easy to do took about 20 minutes,With new rubbers.
The only slightly tricky one to change was the 3rd one from the front of the engine, As there is very little movement in the feed pipe.
I found it easier to undo this pipe at both ends,makes it easier to line the union up without bending the pipe,
Have noticed a definite improvement in power and a smoother idle,I think the ones in were the originals as they had the mercedes star engraved on them,
Cheers,
Steve
Offline Profile Quote Post Goto Top
 
horatio
Part of things
[ *  * ]
The idle on mine has always been a tad uneven, even with a new ICV, vacuum pipes, ignition bits etc... could worn out original injectors be the cause? Its on 151k.
Offline Profile Quote Post Goto Top
 
gibpetrolhead
Member Avatar
Racing line
[ *  *  *  *  *  *  *  *  * ]
horatio
Mon Jan 27, 2014 1:26 pm
The idle on mine has always been a tad uneven, even with a new ICV, vacuum pipes, ignition bits etc... could worn out original injectors be the cause? Its on 151k.
The recommended replacement is at 70k but they're fine for twice that mileage so they could be due for a change. Test with some cleaner first and if that improves the idle then you would know. But it's not the only possible problem or solution.
Offline Profile Quote Post Goto Top
 
eagle3
Therapy Needed
[ *  *  *  *  *  * ]
How much you paying for injectors in the uk these days?

I can get these Febi http://www.webdealauto.com/fr/injecteur/febi-bilstein-29390/3902.658798.html
and the seals http://www.webdealauto.com/fr/support-soupape-d-injection/febi-bilstein-06798/3914.162461.html

That's about €200 for six delivered. Bosch ones about €40 each.
Offline Profile Quote Post Goto Top
 
Big Ben
Member Avatar
Sneaky 2.5-16 Driver!
[ *  *  *  *  *  * ]
eagle3
Thu May 29, 2014 8:03 am
How much you paying for injectors in the uk these days?

I can get these Febi http://www.webdealauto.com/fr/injecteur/febi-bilstein-29390/3902.658798.html
and the seals http://www.webdealauto.com/fr/support-soupape-d-injection/febi-bilstein-06798/3914.162461.html

That's about €200 for six delivered. Bosch ones about €40 each.
£28.99 each for Bosch injectors!

Ebay link
Offline Profile Quote Post Goto Top
 
Vtec
Member Avatar
Part of things
[ *  * ]
Also check german ebay, they work out £25 each and that's with seals.
Offline Profile Quote Post Goto Top
 
eagle3
Therapy Needed
[ *  *  *  *  *  * ]
Yes €144 + €8.50 P&P on german ebay for six. Not sure whether seals are included.

http://www.ebay.fr/itm/6X-INJEKTOR-BOSCH-SATZ-MERCEDES-BENZ-S-KLASSE-W126-260-300-SE-/291152106743?pt=DE_Autoteile&hash=item43ca0494f7#shpCntId
Edited by eagle3, Thu May 29, 2014 10:23 am.
Offline Profile Quote Post Goto Top
 
eagle3
Therapy Needed
[ *  *  *  *  *  * ]
Can someone confirm whether these are the right injector seals for my 1992 2.6 http://www.webdealauto.com/fr/support-soupape-d-injection/febi-bilstein-06798.3914.162461.362.html

I'm going to order six injectors from that german ebay site I linked to above. Not sure whether they come with the seals though. Price now down to € 142.50 + €8.50 .
Offline Profile Quote Post Goto Top
 
Gaz2N
Member Avatar
Old Merc nutter
[ *  *  * ]
eagle3
Mon Sep 15, 2014 11:50 am
Can someone confirm whether these are the right injector seals for my 1992 2.6 http://www.webdealauto.com/fr/support-soupape-d-injection/febi-bilstein-06798.3914.162461.362.html

I'm going to order six injectors from that german ebay site I linked to above. Not sure whether they come with the seals though. Price now down to € 142.50 + €8.50 .
They look ok but you'll need the outer o-rings too. The outer ones fit around the plastic tubes.

Gary
Offline Profile Quote Post Goto Top
 
eagle3
Therapy Needed
[ *  *  *  *  *  * ]
Just removed all six injectors with the plastic sleeves. A decent 5mm Allen key with hex "ball" on the long end was good enough to get all six out. I did remove the fuel line cluster for the front three cylinders.

BTW I would recommend getting a good set of strong long Allen keys for these cars. A set to 10mm is well worth the 20 quid or so.

I'm going to take them to town to get cleaned and tested as I'm not sure how old they are. I'll be renewing all the seals of course. i fancy the cup seals are a tad loose.

Kent's vid on removing them on an M104
http://www.youtube.com/watch?v=pOZRHt-GkHY
Offline Profile Quote Post Goto Top
 
eagle3
Therapy Needed
[ *  *  *  *  *  * ]
Unfortunately the Bosch centre in town which tests and does ultrasound cleaning is no longer there!

Anyway ordered some seals at MB. I did some testing with the compressor and they seem to be all opening around 3.5 bar. But I'll get a new set eventually - they're obviously getting a bit tired. MB wanted over € 60 a pop for them so I'll try the German ebayer.
Offline Profile Quote Post Goto Top
 
eagle3
Therapy Needed
[ *  *  *  *  *  * ]
Just got the seals from MB.

6 guide bushes A 116 070 0077
6 O rings A 103 997 0045

€ 23.47

Just need some new injectors now. :$
Offline Profile Quote Post Goto Top
 
1 user reading this topic (1 Guest and 0 Anonymous)
Go to Next Page
« Previous Topic · Engine · Next Topic »
Add Reply


Email me if anyone replys