Turbocharger Installation Torque Values In Inch Pounds - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
TABLE VIII-II. TURBOCHARGER
INSTALLATION TORQUE VALUES IN INCH POUNDS
Turbine and compressor mount to engine .........................................
225-300
Turbine housing to center housing capscrews .............................................
100-130
Turbo oil inlet and outlet flange capscrews ...............................................
200-270
Compressor housing to center housing clamp .............................................
40-60
Compressor housing to controller housing duct clamps .....................................
40-45
Turbine to exhaust transition bolts ...................................................... 225-300
Exhaust manifolds to transition clamps (V-Band) .......................................
See Note I
Wastegate to transition clamp (V-Band) ...............................................
See Note 2
Tailpipe to wastegate clamp ...................................................
65 bs. to 85 Ibs.
Tailpipe to turbine clamp (V-Band) ...................................................
See Note 3
CAUTION
Do not spread the couplings to force them over the outside of the pipe. They must be passed over the end
of the pipe. If the clamps are spread open excessively, their sealing properties will be destroyed.
NOTES
1.
Before installing the coupling around the adapter pipes, make sure the entire exhaust assembly is in
alignment; that is, mating flanges must match each other. Support the exhaust system in this position
and proceed to install couplings around flange and engage latch. Tighten coupling nut to 50 inch pounds
initial torque. Tap outer periphery of coupling with mallet to distribute band tension. Check torque and
continue tightening to a final torque of 70-80 inch pounds. Tappping coupling until torque reading
stabilizes.
2.
With the flanges together, position the coupling over the flanges. Press the coupling around the flanges
and engage the latch. Tighten the coupling nut to about 60 inch pounds torque. Then tap around the outer
periphery of the coupling with a mallet to distribute band tension. Check the torque on the coupling nut
and this time tighten to 80-90 inch pounds. Again tap around the periphery of the coupling and recheck
the torque. Repeat this procedure until the maximum torque of 80-90 inch pounds is attained.
3.
Fit tailpipe flange to turbine flange making certain flange faces are butted together with no gap. Position
tailpipe for clearance with exhaust pipe. Slide clamp over flanges, position and tighten. Tap the coupling
gently to distribute band tension while tightening the coupling nut. Torque clamps 45-55 inch pounds.
Reissued: 9/23/80
POWERPLANT
2H24