cbrahs

6.7L DIESEL


GENERAL DESCRIPTION
DESCRIPTION SPECIFICATION
Engine Type In-Line 6 Cyl. Turbo Diesel
Displacement 6.7 Liters
409 ( Cubic Inches)
Bore 107.0 mm (4.21 in.)
Stroke 124.0 mm (4.88 in.)
Compression Ratio 17.2:1
Cylinder Pressure (Minimum) 350 psi.
Horsepower High Output 68 RE A/T and G 56 M/T 350 HP @ 3013 RPM
Maximum Compression Pressure Variation Between Cylinders 20% from cylinder to cylinder
Torque Rating High Output ( 68RE A/T and G 56 M/T) 650 LB-FT @ 1400 RPM
Lubrication System Pressure Feed-Full Flow With Bypass Valve
Firing Order 1-5-3-6-2-4
Cylinder Block Cast Iron
Crankshaft Induction Hardened Forged Steel
Cylinder Head Cast Iron With Valve Seat Inserts
Combustion Chambers High Swirl Bowl
Camshaft Chilled Ductile Iron
Pistons Cast Aluminum
Connnecting Rods Cross Rolled Micro Alloy


PISTONS
DESCRIPTION SPECIFICATION
Metric Standard
Skirt Diameter
(Measure the skirt 21.4mm (0.84 in) from the bottom of the piston) 106.828- 106.892mm 4.2078 - 4.2083 in.
Ring Groove Clearance The clearance for the top piston ring can be measured accurately with a typical feeler gauge. The clearance for the top piston ring can be measured accurately with a typical feeler gauge.
Intermediate (Min) 0.040 mm 0.0016 in
(Max) 0.110 mm 0.0043 in.
Oil Control ( Min) 0.040 mm 0.0016 in.
(Max) 0.085 mm 0.0033 in.


PISTON PINS
DESCRIPTION SPECIFICATION
Metric Standard
Pin Diameter ( Min) 39.997 mm 1.5747 in.
(Max) 40.003 mm 1.5749 in.
Bore Diameter (Min) 40.006 mm 1.5750 in.
(Max) 40.012 mm 1.5753 in.


PISTON RINGS
DESCRIPTION SPECIFICATION
Metric Standard
Ring Gap
Top Ring 0.30 - 0.46 mm 0.012 - 0.018 in.
Intermediate 0.82 - 1.18 mm 0.032 - 0.047 in.
Oil Control 0.22 - 0.58 mm 0.010 - 0.023 in.
Ring Gap Wear Limit
Top Ring See Above See Above
Intermediate See Above See Above
Oil Control See Above See Above


CONNECTING RODS
DESCRIPTION SPECIFICATION
Metric Standard
Bearing Clearance
Desired 0.04 - 0.12 mm 0.002 - 0.005 in.
Wear Limit See Above See Above
Pin Bore Diameter (Min. w/ bushing installed) 40.019 mm 1.5764 in.
Pin Bore Diameter (Max. w/ bushing installed) 40.042 mm 1.5765 in.
Side Clearance (Min) 0.100 mm 0.004 in.
Side Clearance (Max) 0.330 mm 0.013 in.


CYLINDER HEAD
DESCRIPTION SPECIFICATION
Metric Standard
Overall Flatness End To End (max) 0.305 mm 0.012 in.
Overall Flatness Side To Side (Max) 0.076 mm 0.003 in.
Intake Valve Seat Angle 30° 30°
Exhaust Valve Seat Angle 45° 45°
Valve Stem Diameter
(Min) 6.96 mm 0.2740 in.
(Max) 7.01 mm 0.2760 in.
Valve Margin (Min.) 0.79 mm 0.031 in.


Injector Protrusion
DESCRIPTION Metric Standard
MIN 2.45 mm 0.96 in.
MAX 3.15 mm 0.124 in.


NOTE: Do NOT use thicker or double stacked injector sealing washers to correct injector protrusion. This will cause misalignment of the high pressure fuel connector.




OIL PUMP
DESCRIPTION SPECIFICATION
Metric Standard
Tip Clearance Between Rotors (Max) 0.178 mm 0.007 in.



OIL PRESSURE
DESCRIPTION SPECIFICATION
Metric Standard
At Idle 69 kPa 10 psi
@ 2500 rpm 207 kPa 30 psi
Regulating Valve Opening Pressure 517 kPa 75 psi
Oil Filter Bypass Pressure Setting 344.75 kPa 50 psi


CYLINDER BLOCK
DESCRIPTION SPECIFICATION
Metric Standard
Cylinder Bore Diameter New - 106.990 - 107.010 mm New - 4.2122 - 4.2130 in.
Used - 106.990 - 107.030 mm Used - 4.2122 - 4.2138 in.
Out of Round ( Max.) 0.038 mm 0.0015 in.
Taper (Max.) 0.076 mm 0.003 in.
Tappet Bore Diameter 16.000 - 16.055 mm 0.630 - 0.632 in.
Camshaft Bearing / Support Bore Diameter(s) 54.083 - 54.147 mm (Bushing Installed) 2.1293 - 2.1318 in. (Bushing Installed)


CRANKSHAFT
DESCRIPTION SPECIFICATION
Metric Standard
Connecting Rod Journal Diameter 68.962 - 69.013 mm 2.7150 - 2.7170 in.
Out-of-Round (Max.) 0.050 mm 0.002 in.
Taper (Max.) 0.013 mm 0.0005 in.
End Play Range 0.120 - 0.432 mm 0.004 - 0.017 in.
Desired End-Play See Above See Above
Wear Limit See Above See Above
Main Bearing Clearance 1-6 0.04 - 0.12 mm 0.002 - 0.005 in.
Wear Limit See Above See Above


MAIN BEARING JOURNALS
DESCRIPTION SPECIFICATION
Metric Standard
Diameter - High 83.013 mm 3.2682 in.
Diameter - Low 82.962 mm 3.2662 in.
Taper
Out of Round (Max.)


CAMSHAFT
DESCRIPTION SPECIFICATION
Metric Standard
Journal Diameter 53.095 - 54.045 mm 2.0904 - 2.1278 in
Bore Diameter See Cylinder Block Section See Cylinder Block Section
End Play 0.12 - 0.5 mm 0.005 - 0.02 in.


SOLID TAPPETS
DESCRIPTION SPECIFICATION
Metric Standard
Stem Diameter 15.936 - 15.977 mm 0.627 - 0.629 in.


VALVES
DESCRIPTION SPECIFICATION
Metric Standard
Valve Stem Diameter (Min) 6.96 mm 0.2740 in.
(Max.) 7.01 mm 0.2760 in.
Valve Margin - Intake 0.79 mm 0.031 in.
Valve - Exhaust 0.79 mm 0.031 in.


VALVE SPRINGS
DESCRIPTION SPECIFICATION
Metric Standard
Free Length - Spring 47.75 mm 1.88 in.

Dale_K

That's the first time I've seen the manual trans rated for 650 lb/ft of torque, in other words the same as the automatic. I thought the manual was rated for the same hp but lesser torque at 610. That has always confused me because the only way it could have the same power but lesser torque would be if it revved higher and that doesn't make a lot of sense.

2006BLKMegacab

All they hafta do with to change the torque numbers but not the horsepower is dump a little less fuel into the cylinders at the top of the torque band, its very easy to do