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T18 Turbocharger's Technical Data


Technical data for Model T18 by Garrett

Tolerances
PartInches Millimeters
Min.Max.Min. Max.
Compressor wheel
Bore diameter 0,3736 0,3739 9,4890 9,4970
Back plate
Piston ring bore diameter 0,6875 0,9885 17,4630 17,4880
Oil seal ring gap 0,0030 0,0080 0,0700 0,2000
Bearing housing
Piston ring bore diameter 1,0290 1,0310 26,1400 26,1900
Bearing bore diameter 0,9830 0,9835 24,9680 24,9810
Oil seal ring gap 0,0080 0,0150 0,2000 0,3800
Shaft and wheel
Piston ring groove width 0,0645 0,0665 1,6380 1,6890
Journal diameter ( all others ) 0,6250 0,6254 15,8750 15,8850
Journal diameter (T1815,78) 0,6247 0,6250 15,8670 15,8750
Seal hud diameter 0,9950 0,9970 25,2700 25,3200
Eccentricity of small diameter 0,0005 0,0130
Thrusth spacer
Piston ring groove width 0,0695 0,0715 1,7650 1,8160
Diameter (I.D.) 0,3754 0,3758 9,5350 9,5450
Piston ring bore diameter 0,6040 0,6080 15,3400 15,4400
Diameter (O.D.) 0,6715 0,6725 17,2470 17,2590
Thickness 0,4860 0,4870 12,3400 12,3700
Parallelism between faces 0,0002 0,0050
Thrusth collar
Diameter (I.D.) 0,3755 0,3759 9,5350 9,5450
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 0,0040 0,0090 0,1000 0,2300
Radial bearing clearance 0,0040 0,0090 0,1000 0,2300
Torques
PartPounds per Inch Newtons per meter
Min.Max.Min. Max.
Bolts
compressor housing 100,0 110,0 11,3 12,4
turbine housing 100,0 110,0 11,3 12,4
insert plate 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 15,0 25,0 1,7 2,8

 


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