just done the injector seals & washers on a motor we have in. Injectors can be a pest to remove so here is a tool I made that makes it easy. Just an old hefty screwdriver & make a 20mm 90deg hook on it. Hook under the injector right by the bolt hole, pull back & pop! Out it comes. Use the hook to lift the injector out. Hope this helps someone.

Looks good, I used a long Allen key

I used half of a plumbing pliers like this