injector cleaning

[nivapilot]

Hi all,
How eassy?is it to strip, clean and reassemble injectors?
Can I do it with ordinary tools, or do I need specialist stuff?


I had to rebuild my engine, HDJ81 4.2 TD engine, when I bought the car, due to the last owner not checking the oil level and knocking it about a bit.

Once it had been rebuilt, I started it up and couldn't rev it over 1600 RPM..but once I had fed neat diesel through the pump it started running and revving ok.
The last owner had been running on veg oil, and it choked/gummed the pump up, where it had been sat for over a year before I started it.

Now the engine will be running ok and then suddenly puff out black smoke...especially when I boot it a bit, now the other day I had a guy following me, and he pulled in behind me, told me he was a diesel engineer, and that I had a problem with one of my injectors.

If when it was stood for a year, and then I have freed off the pump, I suspect that some gummy stuff has gone up the pipe into an injector? partially blocking?

Does this sound feasable?

 

[Chris]

Essentially, and being honest rather than rude, if you are asking that question, leave them alone. Taking them out is very easy. Then find a deisel specialist and hand them to him. They really aren't user serivable items. They have spring and shims and all sorts in them. They do have a coarse filter just at the top of the elbow where the fuel union goes on so there is no harm looking in there, but don't dismantle them.

Love your Avatar by the way. Got a 24v in blue by any chance? Ha ha.

Chris

 

[nivapilot]

That was sort of what I was expecting, thanks for your honesty Chris.

sorry I don't have any other models for an avatar, but glad you like it.

 

[Chris]

Karl stocks fresh injectors I know. Worth having yours tested and then if they're duff just swap them. I have a local guy who I bung a bit of beer money and he does them on the spot. Takes a couple of minutes and you can see the results for yourself.

You might have someone close by.

Chris

 

[Roger Fairclough]

I'll go with Chris on this. The w/shop manual tell you how to strip, clean and re-assemble with new parts as necessary, but it's the re-setting with shims on a diesel injector calibrator that makes it a specialist job.

Roger

 

[nivapilot]

Cheers for the replies lads. looks like time to get others involved..