common rail diesels and injectors

[timtheenchanter]

After much prodding and poking around I have a culprit for my vehicle issues, I just have a few questions about common rail engines before I continue.

Firstly, are the injectors just a push fit? they look to be, if so, how likely is it that one will come out easily?

Second, I am aware that they need coding to an engine, but if I bought a used one from the same vehicle, would it require recoding, and would it need to be from the same cylinder as the one I am replacing?

The last diesel I pulled apart like this was a normal non turbo, non common rail astra,

 

[Peter.N.]

They vary, the ones on the PSA 16 valve engines and some others have very long injectors which are very difficult to get out although you can buy specialy made extractors there are some reasonable ones on ebay.

Whether they need coding or not depends on the vehicle, I know the ones on the 8 valve Hdi engines dont but many do, I believe the programming is to calibrate the ammont of fuel injected with the other injectors so they may possibly work without calibration.

They are certainly very different to the old IDI systems.

Peter

 

[timtheenchanter]

hi, thanks for the reply, the engine in question is a 2003 kia 2.9 CRDI engine from a sedona, shared with the Hyundai from the same vintage (Terracan IIRC)

some of the extractors I have seen seem to be a slide hammer with a adaptor that fits under the injector, I have a slide hammer, so with a bit of jiggery pokery hopefully i will be able to use that.

 

[Peter.N.]

I'm afraid I don't know your particular engine so can't help much more with that.

The slide hammers are a bit hit and miss, the best sort are the screw type but of course they are more expensive.

Peter

 

[Belle427]

i would expect them to be screwed in as they operate under tremendous pressure, the only ones i know for sure that do need coding to the car are the ford range

 

[Burnerman]

So far as I'm aware, injectors are either screwed into place or held by a clamp.....certainly a slide hammer can be needed once the clamp is off.
I would have a natter with a Kia dealer regarding coding afterwards - some do, some don't. Izuzu's certainly do.
John

 

[timtheenchanter]

Cheers, all.
for reference.
Yes, the kia injectors are clamped in.
Yes they need coding, even a used unit would need coding to my engine.
After phoning a few diesel specialists, they all advised the same, that a slide hammer type remover probably wouldn't get my injectors out.
All in all, I've weighed it up, and have decided to get it done by a pro, they then have the responsibility of getting the old unit out, and I'll get the car back running, instead of me having to swap it out, then try and get a non-running car to have the injector/ECU coded up (the new units also under their warranty then too!!).

 

[Peter.N.]

Probably a wise move if you don't have unlimited time at your disposal.

Peter