TS Performance Duramax Shim Kit - Manual (Page 3)

Continued
Then place valve in a vice,
Clamping down on sides of valve cap.
5. Use a wrench to unscrew supplied nut in order to
remove valve cap. Be careful to hold end of valve
while doing this! It is spring loaded and you don’t
want to loose parts! There is a small needle valve in
the cap, it is located behind the washer with the 3
holes. Be sure it does not fall out. If it does the
truck will not start once the valve is re-installed. If it
does fall out be sure to re-install it. It is tappered
and should be flush with the cap when inserted
properly.
6. Another view of removing the valve cap after
loosening in step 5.
7. Removing the metal spring, then insert the 3
supplied metal shims into valve. Now re-insert the
metal spring back into the valve.