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T12 Turbocharger's Technical Data


Technical data for Model T12 by Garrett

Tolerances
PartInches Millimeters
Min.Max.Min. Max.
Compressor wheel
Bore diameter 0,3121 0,3124 7,9270 7,9350
Back plate
Piston ring bore diameter 0,6870 0,6880 17,4490 17,4750
Oil seal ring gap 0,0030 0,0080 0,0700 0,2000
Bearing housing
Piston ring bore diameter 0,8210 0,8230 20,8500 20,9000
Bearing bore diameter 0,9827 0,9832 24,9610 24,9730
Oil seal ring gap 0,0080 0,0150 0,2000 0,3800
Shaft and wheel
Piston ring groove width 0,0650 0,0720 1,6500 1,8200
Journal diameter 0,6250 0,6254 15,8750 15,8850
Seal hub diameter 0,7955 0,7965 20,2050 20,2310
Eccentricity of small diameter 0,0000 0,0005 0,0000 0,0130
Thrusth spacer
Piston ring groove width 0,6850 0,6950 1,7400 1,7650
Diameter (I.D.) 0,3138 0,3141 7,9710 7,9780
Piston ring groove diameter 0,6040 0,6080 15,3400 15,4400
Diameter (O.D.) 0,6770 0,6780 17,2000 17,2200
Thickness 0,5160 0,5170 13,1100 13,1300
Parallelism between faces 0,0001 0,0030
Thrusth collar
Diameter (I.D.) 0,3138 0,3141 7,9710 7.978,0000
Thickness 0,2990 0,3000 7,5900 7,6200
Parallelism between faces 0,0003 0,0080
Clearances
PartInches Millimeters
Min.Max.Min. Max.
Rotor
Axial end play 0,0060 0,0130 0,1500 0,3300
Radial bearing clearance 0,0030 0,0070 0,0800 0,1800
Torques
PartPounds per Inch Newtons per meter
Min.Max.Min. Max.
Bolts
turbine housing 160,0 190,0 18,1 21,5
backplate 30,0 40,0 3,4 4,5
Shaft nut
1st - Tighten to 125,0 150,0 14,1 17,0
2nd - Loosen the nut
3rd - Retorque to 35,0 55,0 4,0 6,2
V clamp
compressor housing 110,0 130,0 12,4 14,7

 


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