HELP!!! Injector Bolt SNAPPED

[Deanmclone]

Hey Guys and gals

Has anyone ever had their injector bold snap and leave the thread in the head?

This is what happened to me I was driving down the motor way and heard a very faint tapping so rushed to stop but it was too late injector bolt snapped and two injectors sticking up! Had to get the car transported back but now I’m not sure on how to get the threads of the bolt out, has this happened to anyone here before and how did you get it out

Thanks for any help in advance

Dean

[MelissaLeigh]

Hey! Caddy gal here

Joined to ask advice and if you have found any solution as im sure this is whats up with my 2012 caddy

There doesnt seem to be an easy fix XD arrghhh

Thx in advance

[STP]

Best tip, get a left handed drill bit (buy a couple of sizes smaller than the M6 bolt, so M4 drill bit) and drill straight down into the thread end, gently and centered properly (may need to use a centre punch with not too much force, to put a dab into the end so the drill bit sits in the middle without wandering) and as soon as the left handed drill bit starts to bite, it will just unscrew the bolt with no problem. Go slowly and keep the drill straight and vertical.

Set the drill gun to left hand direction of course too, so it runs anti clockwise! The injector bolts are mild steel so easy to bite into with the drill bit. They aren't hardened at all.

Don't push down too hard when drilling, let the bit do the work. Light pressure until it starts cutting and then it will just stick in the bolt and the bolt itself will unscrew instead of the drill going any deeper.

If you want to guarantee the drill can't slip off, put an M6 nut onto the remains of the bolt, even if you only get a few threads on, and the drill will stay inside the nut area.

Keep the drill speed low. Slow and steady until it bites into the end of the broken bolt. Then you can use little bursts of drill trigger, not too fast. If the drill gun has a screwdriver torque setting, use that. Turn it mid way then go up a few clicks at a time until it unscrews the bolt instead of it just rattling the torque clutch.

Get a couple of drill bits the same size, and IF you snap one in the bolt (unlikely) then get hold of the bit of drill with mole grips and turn clockwise, the broken drill will come straight out. Then go again with another fresh bit.