Würth 1952 003 750 Traduction Des Instructions De Service D'origine page 36

Use the extension + bit (among the two supplied with tip Ø2.7 or
Ø3.6) to remove the portion of the electrode remained (fig. 11).
Reference codes: 1952 003 206, 1952 003 207
Tools required: Electric drill
Make the pilot hole for the extraction of the glow plug (fig. 12)
using the long cylindrical spiral bit Ø5,5 (M10).
Reference codes: 1952 003 209
Tools required: Electric drill
Use the extension + bit with 2 diameters and begin the drilling
operation, taking care to drill in small sections (1 to 2 mm) and blow
to remove the metal shavings, until the bit reaches the stop shoulder
and removes completely the threaded part of the glow plug.
In this way you have removed the upper part of the glow plug.
Reference codes: 1952 003 212 (+1952 003 213), 1952
003 211, 1952 003 210
Tools required: Electric drill
If necessary (engine size) use the extension for
bit-holder code 1952 003 220.
Use the ¼ -28 UNF male (M10) + extension and start the manual
threading operation for removing the spark plug (fig. 32).
Reference codes: 1952 003 249, 1952 003 215
Tools required: Ratchet wrench
To renew the thread for the new glow plug which will be mounted,
use the included male + extension (fig. 33).
Reference codes: 1952 003 218, 1952 003 219
Tools required: Ratchet wrench
Once renewed the thread for the new spark plug,
clean the seat with compressed air to remove dirt
and / or material debris.
After completing the thread, use the guide-body (ref. 1952 003
241) + thread insert ¼" (ref. 1952 003 262) + nut CH30 (ref.
1952 003 264) + Tension rod M12 for removal (ref. 1952 003
263) and start screwing; go on to remove completely the glow plug.
36
30
31
32
33