The existing pyrometer was installed in the exhaust manifold, pre-turbo. The manifold was drilled with a 7/16” drill bit, and then chased with a 1/4" pipe tap. Remove the pyrometer, and then the fitting. Installing the thermocouple upstream of the turbo gives a more accurate reading of the exhaust gas temperatures before the heat is lost driving the turbine wheel. TIP: when drilling the intake manifold, keep the engine running. Also do it in small steps, starting with a small drill bit, and work your way up. This will reduce the side of the metal shavings that will enter the exhaust housing of the turbo.



Prior to installing the new fitting, be sure to thread the set screw in with an allen wrench.



Slide the thermocouple into the port until it bottoms out, then pull back approximately 3/4". Use an allen wrench to tighten the set screw to secure the thermocouple to the fitting. Otherwise, it will vibrate free.