DIY IP timing lock

[GregMN]

I swapped out the IP on my W210 606.912 N/A for the IP from a 603.970 that I had lying around.
I needed to lock the IP timing for installation.
I did not have the locking tool and did not want to wait for it.
So I made my own.

1 5/16" long piece of 3/8" od (1/4" id) soft copper tubing.
A notch cut to fit over and hold the timing ridge in place.
The body of the plug for the timing port is hollow up to the head. The copper tube fits inside it.

Get the timing ridge in the center of the port.
Install the tube so the notch catches the ridge.
Screw the plug on over the tube just a little bit tighter then finger tight.