You are a life saver, however I left the holder hole 10mm in order to keep the holder strenght, tapped 10mm in the head, but for the 10M bolt went to the machine shop and from the bolt head 17.5mm were cut down to 8mm and a 30degree radius was added to the bolt head bottom, holder hole was cut as well to the same 30degree angle. Main thing is to make sure the bolt is not too long, but as well to have enough thread engagment. At the end torqued them down to 35NM

Tap the bolt hole to 10mm . It doesn't need to be drilled because a 10mm tap fits lovely. Then make a 10mm to 6mm bush . Locktite it in then use a 6 mm Allen head short bolt to bolt clamp down. Iv done more than I can remember

A year in the beginning of March 2021 I took out the bolt and the injector, because I thought that injector started to leak, but found that everything was in perfect condition. The car has 180k miles and engine has all old pump, all pulleys, everything is old and making noise, so I thought that the injector was leaking, but no, injector was fine.

I had my original M6 screw break off flush with the cylinder head so I could only drill and tap down that far. Now, I just started the car and that injector is blowing by. I DO NOT want to to break the rocker cover and strip these new M10 threads... This is where I am. I will use a split lock washer first, though, and let y'all know how it works.

The clamps are counter sunk for the original bolts. I’ve done all four of mine on my om646. All you need to do is drill clamps to 12mm if you using 10mm bolts and they work perfectly.

Nice fix - When I have repaired these - I have noticed that the rocker cover hole dont always line up with the holes in the cylinder head - I see your 10mm cap screw must be awkward getting the injector and clamp back into the hole? Even a smaller bolt can be fiddly.....- Also some C and E class clamps can be of different geometry - I use this method only if someone has previously helicoiled the bottom or broken a tap inside....... have lost count howbl many black death CDI’S I have attended to.... keep up the good work....!

Hi! Have a same problem, M6 screw is broken inside. I would like to make a new thread M10, do i have to drill first a bigger hole or I can just start threading M10? Thanks

I think I have the same problem with mine right now, we have gone to 10mm, and when start the car seems tight and clamp seems tight, then when turnover the engine leaks out and play with injector does this seem like the same problem you had?

Salve posso mettere due pezzi di felitatura

@3.28 The English word your looking for is : chamfered /ˈʃæm. fər/ or /ˈtʃæm. fər/ is a transitional edge between two faces of an object. Sometimes defined as a form of bevel, it is often created at a 45° angle between two adjoining right-angled faces.