Hi guys, I helped my buddy in the workshop yesterday. He recently measured compression on the engine (Opel Vivaro, 1.9 DTI) and found out that a glow plug thread is not so great anymore. When he turned the glow plug back in, he already noticed that it can be turned in strangely. Well, then the day before yesterday on the ride the glow plug flew out. Now he wanted to replace the thread with Helicoil yesterday and did not exactly escape to the bore for the n Glowstick drilled. Now the glow plug doesn’t really go in. What can you do now? Build any guidance and drill again at the right angle? Try to use a sleeve? Or just head off and look for another or have it welded up and re-drilled? Luckily this is just a craft car…but it would still be nice if it was running again.