If you are repairing a 1L2E head, this is a Romeo 2001 and up PI head. Due to a countersink problem with
The most important part in the above casting number is the second set of digits 1L2E.
If you use a digital camera or cell phone camera and take a picture you will see the image correctly.
If you use a mirror to see it from the top view note that the number will appear backwards. :
The counterbore p/n 55518 is a self guiding tool that has a pilot shank with 45 degree stop just before the 4 cutting teeth. The counterbore will cut out the extra material found in the FORD 1L2E heads and will stop at the correct depth by stopping on the original OEM taper seat in the aluminum head.
Note: Previously repaired hole
If you need to repair a Ford 2001 and up Romeo 1L2E head that was previously repaired the original taper
seat has been removed and the p/n 55518 counterbore will not have the OEM original taper to stop on.
CounterBoring Manually with head on vehicle.
You may optionally try to countersink manually by hand without removing the head 5/16 to 3/8 of an inch but use caution! You will have to place the counterbore in the hole then mark the "wrench" to visually go down 5/16 to 3/8 of an inch to remove the step of aluminum.
CounterBoring with head off vehicle
We can still repair this by removing the head and counterbore manually to remove the extra step
of material found in the 1L2E head. We measure the pilot extending from the chamber side 3/8".
CLICK HERE FOR IMAGE:
Now continue with the p/n repair kit and the insert will be in the correct location.