TK 2.49 & TK 3.74 Diesel Engine Specifications (Rev 1/97)
9
Valve Train (continued)
Standard Dimensions
Wear Limit
Valve Seat Width
Intake
.045 in. (1.15 mm)
.065 in. (1.65 mm)
Exhaust
.056 in. (1.41 mm)
.075 in. (1.91 mm)
Push Rod Length
4.488-4.528 in. (114.00-115.00 mm)
Rocker Arm Bushing Inside Diameter .3937-.3945 in. (10.000-10.020 mm)
.3972 in. (10.090 mm)
Rocker Arm Shaft Outside Diameter
.3926-.3932 in. (9.972-9.987 mm)
.3917 in. (9.950 mm)
Rocker Arm Bushing to Rocker Arm
Shaft Clearance
.0005-.0019 in. (0.013-0.048 mm)
.0055 in. (0.140 mm)
Tappet Outside Diameter
.7067-.7074 in. (17.950-17.968 mm)
.7059 in. (17.930 mm)
Tappet Bore Inside Diameter
.7087-.7094 in. (18.000-18.018 mm)
.7106 in. (18.050 mm)
Tappet To Tappet Bore Clearance
.0013-.0027 in. (0.032-0.068 mm)
.0047 in. (0.120 mm)
Camshaft
Cam Lobe
1.1799-1.1823 in. (29.970-30.030 mm) 1.1713 in. (29.750 mm)
Camshaft Journal
Timing Gear End
1.4150-1.4157 in. (35.940-35.960 mm) 1.4114 in. (35.850 mm)
Middle
1.4138-1.4148 in. (35.910-35.935 mm) 1.4114 in. (35.850 mm)
Flywheel End
1.4150-1.4157 in. (35.940-35.960 mm) 1.4114 in. (35.850 mm)
Camshaft Bearing Inside Diameter
Timing Gear End Bearing Insert
1.4173-1.4199 in .(36.000-36.065 mm) 1.4213 in. (36.100 mm)
Middle Bearing
1.4173-1.4183 in. (36.000-36.025 mm) 1.4213 in. (36.100 mm)
Flywheel End Bearing
1.4173-1.4183 in. (36.000-36.025 mm) 1.4213 in. (36.100 mm)
Camshaft Journal to
Camshaft Bearing Clearance
Timing Gear End
.0016-.0033 in. (0.040-0.085 mm)
Middle
.0026-.0045 in. (0.065-0.115 mm)
Flywheel End
.0016-.0049 in. (0.040-0.125 mm)
Camshaft Deflection
.001 in. (0.02 mm)
.002 in. (0.05 mm)
Camshaft End Play
.002-.010 in. (0.05-0.25 mm)
.016 in. (0.40 mm)
Piston, Piston Rings, and Wrist Pin
Piston Outside Diameter Measuring
Point (From Bottom of Piston)
.39 in. (10.0 mm)
Piston Outside Diameter
Standard
2.5969-2.5980 in .(65.960-65.990 mm) 2.5945 in .(65.900 mm)
1st Oversize
2.6067-2.6079 in .(66.210-66.240 mm) 2.6043 in. (66.150 mm)
2nd Oversize
2.6165-2.6177 in .(66.460-66.490 mm) 2.6142 in. (66.400 mm)
Piston to Cylinder Wall Clearance
.0010-.0022 in .(0.025-0.055 mm)