Here are files for a 3D-Printed Z-block fixture, for the air-cooled 911 crowd. I’m posting two versions. The one named Zblock EZ, shown in Red below, can be assembled with regular hardware store parts. The other, shown in yellow, requires a heat-set brass insert from McMaster Carr. Both of these tools serve the purpose of the factory P207 tool, to adjust valves, set cam timing, measure piston to valve clearance, etc. These work with standard dial indicators with 3/8” mounting posts, and may need a short extension on the dial indicator.
The yellow one uses a short M4 x 0.7 heat-set brass thread insert, item number 94459A150 at McMaster-Carr. To install, put the insert on the tip of a soldering iron, then melt them into the hole on the side of the z-block. You can then use a standard M4 x 0.7 bolt to secure the dial indicator in the z-block. If desired, you can also buy an M4 thumb screw, or make one using the M4 thumbscrew 3D-Printer file posted below.
Zblock by Carpokes.stl
Zblock EZ by Carpokes.stl
M4 Thumb Screw.stl
Re: 911 Z-Block P207 Tool
Posted: Fri Jul 19, 2024 2:33 pm
by justinwestrum
will try, thank you!
Re: 911 Z-Block P207 Tool
Posted: Fri Jul 19, 2024 2:59 pm
by travasn2003
will try it...thank you!
Re: 911 Z-Block P207 Tool
Posted: Sat Aug 24, 2024 8:22 pm
by ZIPPER-
Nice i will give both of them a try.
Re: 911 Z-Block P207 Tool
Posted: Tue Nov 12, 2024 10:25 pm
by AUSTmike
Will give it a try thanks for the idea.
Re: 911 Z-Block P207 Tool
Posted: Thu Mar 27, 2025 7:31 pm
by lubing20
Tom wrote: Sat Jun 17, 2023 1:23 pm
Here are files for a 3D-Printed Z-block fixture, for the air-cooled 911 crowd. I’m posting two versions. The one named Zblock EZ, shown in Red below, can be assembled with regular hardware store parts. The other, shown in yellow, requires a heat-set brass insert from McMaster Carr. Both of these tools serve the purpose of the factory P207 tool, to adjust valves, set cam timing, measure piston to valve clearance, etc. These work with standard dial indicators with 3/8” mounting posts, and may need a short extension on the dial indicator.
The yellow one uses a short M4 x 0.7 heat-set brass thread insert, item number 94459A150 at McMaster-Carr. To install, put the insert on the tip of a soldering iron, then melt them into the hole on the side of the z-block. You can then use a standard M4 x 0.7 bolt to secure the dial indicator in the z-block. If desired, you can also buy an M4 thumb screw, or make one using the M4 thumbscrew 3D-Printer file posted below.
