Injector nozzle torque spec?

[david85]

Searched here on obn and elsewhere before coming up short.

Does anyone know the correct torque spec for the fuel injector nozzle retaining cap? This is the part that actually holds the nozzle to the injector body.

 

[Thewespaul]

15#

 

[gerlbaum]

Note, whatever the torque keep it the same if you pop test. It can be used to make incremental adjustments to pop pressures.

 

[david85]

That makes sense that it could have a fine adjustment effect. Probably best to keep a consistent torque though. Same for tightening them into the head as well, since the bottom of the injector is the part that sees all the compression force.

 

[gerlbaum]

Exactly. I torque them all the same, pop test them, and then adjust them with shims (if necessary) and re-torque to the same spec. If not, you could end up chasing your own tail trying to get them to line up - don't ask me how I know until I had that "duh" moment .