Got a leak

[hinsch]

I have a leak on the top of the engine, can anybody tell me what are these sensors / components are (circled) and what is leaking out from them.
How do you repair and is it a DIY job if you have basic hand skills.

[Scooby]

Those are your injectors.
Have you had a valve set done recently?
Are they only leaking oil?
If oil is coming from the seal around the outside you could possibly dig the seal out but I think this would be difficult, and plus if you damage an injector doing this it will get expensive.
Remove the tapper cover and replace all the seals.
Make sure the seals are installed the right way. The injector body seals have the lip on the outside and the injector pipe seals have the lip on the inside.
If it has just had a valves set they possibly didn’t replace the old seals and now it is leaking.

[hinsch]

only recently have valve clearances done so there is a good chance they did not replace the seals