306 2.0 hdi 16v

[Ruan]

I'm fairly sure they are interchangable..

The difference is to do with how the nozzle end works, the difference is to do with the needle seating area, one type (I *think* it's DLLA) are Valve Covered Orifice, which means the needle actually seals up against the openings of the injector..

The other type is "sac" which means the injector allows fuel into a small "sac" at the tip before the orifices...



Like above..

The other type looks like:



Sure you can see the difference, generally they're the same mounting type, but can't remember which type is which, there's a PDF kicking round that does explain it.

Pros and cons to both, IIRC sac-type tends to last longer, less problematic and you don't burn them as easy due to the small quantity of diesel sat in the tip., whereas the VCO nozzle is better for emissions, but gets gummed etc easier.