Is there a thread on proper reaming of the glow plug holes ? .

I recently bought a reamer and it looks to have the correct threads but doesn't quite fit into the hole .

The bad glow plugs came out pretty clean (engine doesn't hardly burn any oil nor smoke) but I figured to give reaming a whirl....

Maybe some detailed instructions with pictures ? .

This is the time of year for Glow Plug and Injector Service before you get stuck on a cold morning .

TIA,

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better