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Injector cleaning
Topic Started: Jan 5 2017, 06:55 PM (1,087 Views)
mark hadley
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Hi,
The MOT man advised me to get the injectors cleaned (smell of the exhaust). I've also found it a bit harder to start than it used to be, and a bit rough running for a few minutes. I'm wondering about buying an injector cleaning additive: AR6400-D MAX (£23) or Wynns (£6). Is the price difference worth it? Either way they are cheap and easy compared with any other solution. I'd appreciate any advice or recommendations.
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graysworld
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Hi Mark,

My opinion on injector cleaner.....don't bother! I think it is a waste of time and money. Take the injectors out and take them to a deisel injection specialist. They will clean and recalibrate them. They need recalibrating from time to time as the springs grow weak and they let fuel in at the wrong pressure. Nozzles get clogged. Cleaning and recalibrating injectors is the first shout with starting/running problems. When you know they are good you can check the timing. This is just what I have learnt with my truck.....as usual other opinions are available!

Graeme
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mark hadley
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Can I take them out easily? while the engine is in the truck?
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ivecojoe
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I agree completely,remove ant take to specialists.Joe
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graysworld
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It isa little fiddly. Be careful of the washers on the return fuel lines, they are easy to drop. They are copper washers. The second time I did it I loosed the return pipes but left them attached to the injectors and pulled them all out together. Difficult to explain but it is very fiddly getting the return fuel line banjo bolts back in the injectors, (one washer either side of the banjo) if they are in but loose it is easy to tighten them with the injectors in place. Sometimes injectors can be stuck in place, I was lucky and mine came free easily. They fit with a clamp and are tapered. I refitted mine with copper grease. I have heard of people turning the engine over with the clamp loose to try to free stuck injectors. I have no experience so can't say if it works.

Graeme
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twoakers
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It's time to clean my injectors.
Initial inspection revealed that they appear to be stuck in the head :'(
So my question is:
Has anyone done this who can recommend the correct type of removal tool please?
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graysworld
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Mine came out easily. I was under the impression that it is possible to get a spanner on them and turn them to loosen them. They are a friction fit on a taper. Maybe ask the injector specialist how they do it.

Graeme
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twoakers
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graysworld
May 13 2017, 11:50 AM
Mine came out easily. I was under the impression that it is possible to get a spanner on them and turn them to loosen them. They are a friction fit on a taper. Maybe ask the injector specialist how they do it.

Graeme
You was lucky Graeme
So this afternoon tried twisting 'em whilst levering with a pry bar under an M14 nut...
...no joy, still stuck fast :-/
I will endeavour to ask specialists next week.......
So, my original question still stands:
Has anyone done this who can recommend the correct type of removal tool please?
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ivecojoe
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only done it on later 3 litre engine, that involved a sawn of heavy JCB crowbar ground out to fit at base and pivot on a bolt head handily just in front of injector, then a 6 foot scaffold tube and two men putting there whole body weight on said pole, feet of ground and bouncing!! ! took two days attempts to get three out,fourth was easy.
for me it was break it or mend it, what i found was some numty had refitted with incorrect bolts so three injectors had not seated and blow by and had coked solid in place ,previous owner had it "serviced" at a dealership!!!!!!!!!
got it sorted thankfully and sweet as a nut now.
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graysworld
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I have heard that you can turn the engine over and let the compression blow them out...not sure how true or how safe this would be!
I have taken mine out twice both times I have speared them with copper grease before refitting...again not sure if it works at the high temperature.

Graeme
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twoakers
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graysworld
May 13 2017, 08:17 PM
I have heard that you can turn the engine over and let the compression blow them out...not sure how true or how safe this would be!
I have taken mine out twice both times I have speared them with copper grease before refitting...again not sure if it works at the high temperature.

Graeme
Yes tried that trick, albeit not driving up up the road - they didn't budge ^o)
Like you once they have been out once, I'll put copper slip on 'em.

ivecojoe
May 13 2017, 07:38 PM
only done it on later 3 litre engine, that involved a sawn of heavy JCB crowbar ground out to fit at base and pivot on a bolt head handily just in front of injector, then a 6 foot scaffold tube and two men putting there whole body weight on said pole, feet of ground and bouncing!! ! took two days attempts to get three out,fourth was easy.
for me it was break it or mend it, what i found was some numty had refitted with incorrect bolts so three injectors had not seated and blow by and had coked solid in place ,previous owner had it "serviced" at a dealership!!!!!!!!!
got it sorted thankfully and sweet as a nut now.
Wow that's extreme force Joe.
I was hoping to use a more controlled method of getting 'em out ^o)
Once out will copper slip 'em back in place

Browsing on eBay found various injectors removed tools and kits.
Anyone know if this will do the trick
eBay injector removal tool?
Edited by twoakers, May 14 2017, 06:05 AM.
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graysworld
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Maybe contact this company

https://shop.pichler-tools.com/online-catalog/engine/injector-tools.html

Here is a slide hammer type (page 14)

http://sykes-pickavant.com/downloads/Sykes-Pickavant%20Engine%20Service%20Tools%20Catalogue.pdf

Graeme
Edited by graysworld, May 14 2017, 09:31 AM.
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twoakers
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So, yesterday afternoon (Sunday) popped over to our local Machine Mart and bought one of these:
https://www.machinemart.co.uk/p/tool-connection-tc4044-diesel-injector-puller/
Tried it out before SWMBO served up dinner
Quick pull on injector no. 1 - about 30 taps and out it popped ;)
Looking at that one revealed that cleaning me injectors is the right thing to do!
First it was rusty and clogged up in the head
Second, the nozzle was well carboned up and appear to be working on only one of the four holes :-/
Today's task will be to remove the other 3 injectors.
Quick clean and then bench test them
Clean them in my new ultra sonic cleaner
Then test them again and decide if they need to go to the specialists
Further update(s) to follow......
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graysworld
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That is good. It is always good when a tool works, so thanks for the recommendation. look forward to the update.

Graeme
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twoakers
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Quick update and today's progress:
Nos 1 and 2 came out relatively easily with my new tool from Machine Mart.
Think the secret is a steady but straight pull achieved by the sliding hammer...
....no. 3 could only be accessed after I'd drained the rolling system and removed the heater matrix and box ^o)
And finally, no. 4 was again restricted access due the bulkhead.
So, it was WD40, M14 nut on the top, twist with breaker bar, whilst levering up with crow bar.
All four have now been checked on my tester, nozzles have 5 holes and most were blocked by carbon.
All cleaned up in an ultra sonic cleaner.
Another test revealed that they are dribbling and not holding pressure.....
.....so 4 x new Bosch nozzles ordered - should be here tomorrow B)

Quick question: anyone know if the nozzles seal into the head with copper washers?
Doesn't appear to be any form of seal into the aluminium head!
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