GT40

Tolerances

Part Inches Millimeters
Min. Max. Min. Max.

Bearing housing

Piston ring bore diameter 0,8220 0,8224 20,8790 20,8890
Bearing bore diameter 0,7024 0,7028 17,8410 17,8510

Shaft and wheel

Journal diameter 0,4520 0,4525 11,4810 11,4940

Clearances

Part Inches Millimeters
Min. Max. Min. Max.

Rotor

Axial end play
Radial bearing clearance

Torques

Part Pounds per Inch Newtons per meter
Min. Max. Min. Max.

Bolts

compressor housing ( 'Z' system ) 185,0 215,0 20,9 24,3
compressor housing ( compact ) 80,0 120,0 9,0 13,6
turbine housing 185,0 215,0 20,9 24,3
backplate 185,0 215,0 20,9 24,3

Shaft nut

Compressor wheels ( threaded ) 110,0 140,0 12,5 15,8
Compressor wheels ( boreless ) 110,0 140,0 12,5 15,8