270 CDI Head off, really stuck injector. Suggestions please!

[spock500]

If it's still stuck perhaps try the following.

Heat the head using a heat gun gently around the injector. This should be sufficient for the alloy to expand whilst the denser steel remains comparatively cold.

When the area is heated sufficiently apply a wrench but do not turn. Instead, squirt directly at the injector with freezing spray whilst applying pressure to the injector.

You might need a budding assistant for this manoeuvre

 

[Alex Crow]

To heat the head in an oven would be best, but that would be a big oven. This is the only way to heat it though, evenly as a whole lump.

As a DIY, they can be drilled out without too much grief (I drilled 2x out of a Vito once), as long as careful reference is made with adjacent injector bores to avoid drilling too far and damaging the sealing surface at the bottom.

However, it ought not to be too hard to mill out (as suggested), or even turn out on a mightly lathe with super big throw.

 

[Frontstep]

Made a big oven once with fire bricks, got them out of an old storage heater, insulated it with glass fibre stuck a gas jet then a hot air gun in it, it got very very hot.
probably impractical for you but it did the job for me.

 

[Sponcom]

Thanks for all the tips, I had not joy heating the injector - it wouldn't budge at all.

I took it to an engineering place and had it machined out in the end.

 

[mersum1es]

I think that happens when body of the injector is already slightly misaligned due to improper sealing, the during the first removing attempts it bents more or something, and after that it really bites itself to the hole... my neighbor did just the same drilling to his Citroen C3 cyl head and one injector. At least you got the bottom of the hole refined at the same time.

 

[kebo57]

Thanks for all the tips, I had not joy heating the injector - it wouldn't budge at all.

I took it to an engineering place and had it machined out in the end.

Good effort mate... don't envy you putting it all back together
but good luck anyway.