and 5 inserts 8mm in length. This kit will not be able to clean a new seat where
the washer will seat, it will only install an insert. .
M14x1.25 spark plug thread repair for short 8mm length inserts.
We offer a kit that would have a standard counterbore to create the
countersink for the flange so the insert sits below the surface. The kit
would be used for spark plugs that are NOT recessed. The spark plug
should be visibly near the surface.
Kit p/n 14125F would include 8mm length inserts.
Example: Used in Harley davidson where the spark plug thread
length is 8mm using a Autolite spark plug part number 86
measure your spark plug thread length to be sure.
Many Harley spark plugs use 3/8 and 3/4 reach plugs which would be our
p/n 4412 kit
with inserts p/n 44125 for 3/8 and p/n 44111 for 3/4.
Normally a special tool called "seat cutter" would be used in our standard
p/n 4412 or 4412E kits
to countersink and clean the seat but we can not use
our standard
seat cutter because of the tap threading too far into the head.
We offer the 14125F kit for the shallow spark plug thread repair
The P/n 14125F kit will include: Drill counterbore, tap, tap guide, install driver
and 5 inserts 8mm in length. This kit will not be able to clean a new seat where
the washer will seat, it will only install an insert. .
Standard spark plug kits p/n 4412 or 4412E would not work for short inserts.
See Step #2
found on standard spark plug repair page, the tap must be threaded 1/4"
Below the surface so "seat cutter" can pilot on the shank of the tap. The tap would fall thru
on short threaded spark plug holes so optional kit p/n 14125F is available.
http://www.timesert.com/html/howtosp.html
Note: Kit p/n 14125D would include 7mm length inserts.