I took my injectors out today.
NB IMPORTANT! scribe or write the cylinder number on each injector body before removing them. They must go back in the same cylinders as each is coded to the ECU.
Undo the single nut that secures the clamp. Don't try to remove the clamp separately, it and the injector come out together.
There is of course a fabulously expensive special tool that nobody has, but with any luck you won't need it. Spray some Plusgas at the base of the injector where it enters the head. Let it sit for a while. Then pull and wiggle the injector at the same time. The clamp doesn't allow much movement, but keep at it and it should eventually lift out. If not, spray more Plusgas and let it sit longer.
Mine came out very easily, but the previous owner had them professionally cleaned last year.
I got stuck on the bracket for the head steady. 2 vertical hex bolts, easy, 1 horizontal ribe bolt, no poxy room for my ribe socket. Which I had to dismantle into two parts, and will try again tomorrow with a 10mm ring on the ribe bit, as it was getting dark.
Then I adjourned to the shed with a cup of tea and drilled, tapped and blanked the spindle holes in the inlet manifold.
The spindle holes turned out to be just 5.42mm dia when I measured them (find a drill that just fits, then measure the drill). Yours may be larger, mine weren't worn. I drilled them out to 7.1mm (odd size, but a 9/32" HSS bit was all I had
, and then tapped them M8 x 1.25mm. Almost any bolt would work, but I had some mushroom-headed stainless M8 bolts in two lengths, 10mm (too short) and 20mm (too long), left over from a futile tidying attempt on my wife's motorcycle. The heads fit just perfectly over the mouldings that the pinions had sat in. I cut the long ones down to 15mm, deburred them, threadlocked them and tightened them up. Different bolts might need to be longer or shorter, depending on where they sit. Precision engineering it is not. Drill, tap, hacksaw, file. Job done.