XUD Injector tips

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Old-Guy
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XUD Injector tips

Post by Old-Guy »

Does anyone know if the injectors on our 95 1.9TD (Bosch pump) Xantia have replaceable tips/nozzles.
2011 Grand C4 Picasso VTR+ 1.6HDi in Kyanos Blue
1995 Xantia Estate SX 1.9TD in Vert Vega "The Green Lady" - after 11 years now owned by XanTom
1998 Xantia 2.1 VXD Estate in Mauritius Blue - R.I.P. (terminal tin-worm)
mark21td
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Post by mark21td »

Yes they can, but they will need the pop pressure set afterwards.
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spider
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Post by spider »

As above really, I think they come as a needle and nozzle set ( ? ) , best to just either take car or injectors (better option if you can do this) and have them either overhauled or exchanged :)
Andy.

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Old-Guy
Posts: 1798
Joined: 11 Sep 2008, 12:08
Location: Gloucestershire
My Cars: 2011 Grand C4 Picasso VTR+ 1.6HDi in Kyanos Blue
1995 Xantia Estate SX 1.9TD in Vert Vega "The Green Lady" - now owned by XanTom
1998 Xantia 2.1 VXD Estate in Mauritius Blue - R.I.P. (terminal tin-worm)
x 17

Post by Old-Guy »

Thanks chaps. I hadn't thought about the 'pop' pressure needing resetting after changing a needle/nozzle set.

Yes, they must always be a matched set because of the super-fine tolerances required. As the tip is the bit that does all the work (in an old-style injector), when it gets worn, the injector doesn't snap open and shut smartly, it dribbles and doesn't produce the fine mist of fuel required to burn quickly and cleanly. Bigger droplets are more reluctant to take light when starting (possibly my problem) and don't burn as efficiently (affecting economy).

As an apprentice 40 years ago, I did a spell testing and repairing injectors, but I really can't remember if the break (pop) pressure did have to be reset after changing tips. I do remember spending endless hours testing new injectors - rejecting the odd 1 for not breaking at quite the right pressure rarely broke the monotony.
2011 Grand C4 Picasso VTR+ 1.6HDi in Kyanos Blue
1995 Xantia Estate SX 1.9TD in Vert Vega "The Green Lady" - after 11 years now owned by XanTom
1998 Xantia 2.1 VXD Estate in Mauritius Blue - R.I.P. (terminal tin-worm)
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