Engine Mechanical Specifications. GMC Truck Yukon

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2001 🢒 Yukon - 2WD 🢒 Engine 🢒 Engine Mechanical - 6.6L 🢒 Engine Mechanical Specifications

Application	Specification
Application	Metric	English
General
Engine Type	90 degree V-8
Displacement	6.6 Liter	402 cu in
Idle Speed	600 RPM
Cylinder Block Material	Gray Iron
Compression Ratio	17.5
Compression Pressure - Production	3158 KPa	458 psi
Bore	103 mm	4.0551 in
Stroke	99 mm	3.8976 in
Upper Oil Pan Material	Aluminum
Cylinder Head Material	Aluminum
Valve Arrangement	4 Valves
Valve Seat Inserts	Yes
Head to Block Attachment	6 Bolts/Cylinder
Stroke Cycle	Four Stroke
Ignition Method	Compression
Fuel Injection	High Pressurized Direct Injection
Maximum Pressure	160 MPa
Intake Manifold Material	Cast Aluminum
Exhaust Manifold Material	Cast Nodular Iron & Steel Pipe
Air Intake System	Turbocharged, Charge Air Cooled
Engine Mounting	Three Point with Transmission
Firing Order	1-2-7-8-4-5-6-3
Crankcase Ventilation	Open PCV
Cylinder Liner	None
Start Aid	Glow Plug
Starter Motor
Type	Torque Reduction
Manufacturer	Hitachi
Rated Output	3.5 KW
Camshaft
End Play - Production Valve	0.050-0.114 mm	0.0020-0.0045 in
End Play - Service Limit	0.2 mm	0.0079 in
Number Furnished	1
Bearing Material	Steel Backed Pb-Sn-Cu Alloy
Number of Bearings	5
Camshaft Drive Type	Gears
Material	Steel
Journal Diameter - Service Limit	60.92 mm	2.3984 in
Journal Diameter - Production Value	60.932-60.962 mm	2.3990-2.4001 in
Camshaft Bearing Inside Diameter - Service Limit	61.07 mm	2.4043 in
Camshaft Bearing Inside Diameter - Production Value	61.00-61.03 mm	2.4016-2.4028 in
Lobe Lift (Exhaust) - Production Value	5.907 mm	0.2326 in
Lobe Lift (Intake) - Production Value	7.273 mm	0.2863 in
Runout - Service Limit	0.05 mm	0.0020 in
Roller Lifter and Push Rod
Roller Lifter Roller Projection - Service Limit	0.9 mm	0.0354 in
Roller Lifter Roller Projection - Production Value	0.989-1.0 mm	0.0389-0.0394 in
Push Rod Bent Condition - Service Limit	Less Than 0.8 mm	Less Than 0.0315 in
Connecting Rods
Type & Material	Forged Steel Fracture Split
Length Center to Center	163.0 mm	6.42 in
Piston Pin Bushing	Steel Backed Pb-Sn-Cu Alloy
Lower End Rod Bearing Type	Straight Split
Make	Steel Backed Pb-Sn-In Overlay
Connecting Rod Bearing Clearance - Service Limits	0.10 mm	0.0039 in
Connecting Rod Bearing Clearance - Production Value	0.036-0.077 mm	0.0014-0.0030 in
Connecting Rod Side Clearance - Service Limits	0.54 mm	0.0213 in
Connecting Rod Side Clearance - Production Value	0.31-0.49 mm	0.0122-0.0193 in
Connecting Rod Bearing Inside Diameter - Production Value	62.958-62.979 mm	2.4789-2.4795 in
Small End Inside Diameter - Service Limits	34.53 mm	1.3594 in
Small End Inside Diameter - Production Value	34.512-34.522 mm	1.3587-1.3591 in
Small End Bearing Clearance - Service Limits	0.08 mm	0.0031 in
Small End Bearing Clearance - Production Value	0.012-0.027 mm	0.0005-0.0011 in
Crankshaft
Material	Forged Steel
Heat Treatment	Nitrided
Main Journal Diameters	80.0 mm	3.15 in
Crankpin Diameter	63.0 mm	2.48 in
Harmonic Balancer	Rubber Damper
Flywheel Material	Cast Iron
Main Bearing Type	Steel Backed Pb-Sn-Cu Overlay
Number of Bearings	5
End Thrust Taken By	Crank Thrust Bearing
Total Bearing Length	103.5 mm	4.07 in
Total Projected Area	13,006 mm²	20.16 in²
Crankshaft Bearing Clearance - Service Limits	0.014 mm	0.0055 in
Crankshaft Bearing Clearance - Production Value	0.037-0.072 mm	0.0015-0.0028 in
Crankshaft End Play - Service Limits	0.54 mm	0.0213 in
Crankshaft End Play - Production Value	0.04-0.205 mm	0.0016-0.0081 in
Crankshaft Journal Diameter - Main - Service Limits	79.89 mm	3.1453 in
Crankshaft Journal Diameter - Main - Production Value	79.905-79.925 mm	3.1459-3.1466 in
Crankshaft Runout - Service Limits	0.44 mm	0.0173 in
Crankshaft Runout - Production Value	0.05 mm	0.0020 in
Crankpin Diameter - Service Limits	62.88 mm	2.4756 in
Crankpin Diameter - Production Value	62.902-62.922 mm	2.4764-2.4772 in
Cylinder Bore
Diameter - Service Limits	103.11 mm	4.0594 in
Diameter - Production Value	103.0-103.014 mm	4.0551-4.0557 in
Bore Taper - Production Value	0.015 mm	0.0006 in
Bore Out of Round - Production Value	0.015 mm	0.0006 in
Cylinder Head
Surface Flatness - Cyl. Block Side - Service Limits	0.2 mm	0.0079 in
Surface Flatness - Cyl. Block Side - Production Value	0.075 mm	0.0030 in
Surface Flatness - Exhaust Side - Production Value	0.1 mm	0.0039 in
Surface Flatness - Intake Side - Production Value	0.1 mm	0.0039 in
Exhaust Manifold
Surface Flatness - Production Value	0.3 mm	0.0118 in
Intake Manifold
Surface Flatness - Production Value	0.3 mm	0.0118 in
Oil Pump
Gear Teeth to Housing Clearance - Service Limit	0.22 mm	0.0087 in
Gear Teeth to Housing Clearance - Production Value	0.125-0.221 mm	0.0049-0.0087 in
Gear to Cover Clearance - Service Limit	0.109 mm	0.0043 in
Gear to Cover Clearance - Production Value	0.064-0.109 mm	0.0025-0.0043 in
Gear Shaft to Bushing - Service Limit Clearance	0.14 mm	0.0055 in
Drive Gear Shaft Outside Diameter - Service Limit	19.86 mm	0.7819 in
Drive Gear Shaft Outside Diameter - Production Value	19.947-19.960 mm	0.7853-0.7858 in
Driven Gear Shaft Outside Diameter - Service Limit	19.86 mm	0.7819 in
Driven Gear Shaft Outside Diameter - Production Value	19.947-19.960 mm	0.7853-0.7858 in
Pistons
Type	1 Piece
Material	Aluminum
Skirt	Antiscuff/Barrel Shaped
Head	Ni-resist Insert for Top Ring Groove
Coolant	Oil Cooling Channel
Piston Pin Type	Hollow
Material	Steel
Diameter	34.5 mm	1.36 in
Retention Method	Snap Ring
Piston Rings Number	3
Top Compression Ring Type	Keystone Ring
Top Compression Ring Material	Steel
2nd Compression Ring Type	Positive Twist/Inner Cut
2nd Compression Ring Material	Cast Iron
Oil Control Ring Type	Bevel-Edged Oil Control Ring
Oil Control Ring Material	Steel
Piston to Small End Clearance - Production Value	5 mm	0.1969 in
Piston Outside Diameter - At 22 mm from Piston Bottom - Production Value	102.948-102.960 mm	4.0531-4.0535 in
Bore Inside Diameter for Piston Pin - Production Value	34.504-34.512 mm	1.3584-1.3587 in
Piston Pins
Clearance in Piston - Service Limit	0.017 mm	0.0007 in
Clearance in Piston - Production Value	0.004-0.017 mm	0.0002-0.0007 in
Pin Diameter - Service Limit	34.45 mm	1.3563 in
Pin Diameter - Production Value	34.495-34.5 mm	1.3581-1.3583 in
Piston Rings
Compression Ring Gap - Service Limit	1.37 mm	0.0539 in
Compression Ring Gap - Production Value	0.3-0.45 mm	0.0118-0.0177 in
2nd Ring Gap - Service Limit	1.35 mm	0.0531 in
2nd Ring Gap - Production Value	0.50-0.65 mm	0.0197-0.0256 in
Oil Ring Gap - Service Limit	1.20 mm	0.0472 in
Oil Ring Gap - Production Value	0.15-0.35 mm	0.0059-0.0138 in
Piston Ring Groove Clearance
Compression Ring - Service Limit	0.26 mm	0.0102 in
Compression Ring - Production Value	0.08-0.17 mm	0.0030-0.0067 in
2nd Ring - Service Limit	0.10 mm	0.0039 in
2nd Ring - Production Value	0.01-0.03 mm	0.0004-0.0012 in
Oil Ring - Service Limit	0.12 mm	0.0047 in
Oil Ring - Production Value	0.01-0.03 mm	0.0004-0.0012 in
Rocker Arms
Rocker Arm Shaft Outside Diameter - Service Limit	21.85 mm	0.8602 in
Rocker Arm Shaft Outside Diameter - Production Value	21.979-22.000 mm	0.8653-0.8661 in
Rocker Arm Inside Diameter - Production Value	22.010-22.035 mm	0.8665-0.8675 in
Rocker Arm Shaft and Arm Clearance - Service Limit	0.20 mm	0.0079 in
Rocker Arm Shaft and Arm Clearance - Production Value	0.010-0.056 mm	0.0004-0.0022 in
Valve Operating Mechanism
Type	Overhead Valve
Valve Guide Material	Iron
Valve Guide Type	Replaceable
Lifter Type	Roller
Rocker Arm Ratio	1.36:1 (Inlet), 1.69:1 (Exhaust)
Rocker Arm Type	Conventional
Rocker Arm Material	Forged
Rocker Arms Shaft Support	Aluminum Die Casting
Rocker Arm Shaft Material	Steel
Valves, Intake
Type	Double
Material	Silicon Steel
Number Per Cylinder	2
Rotation	None
Seat Insert Material	Sintered Steel
Seat Angle - degrees	45 degrees from Vertical
Head Diameter - in	33 mm	1.30 in
Stem Diameter - in	7 mm	0.28 in
Lift - in	9.55 mm	0.376 in
Clearance - Cold - in	0.3 mm	0.012 in
Valves, Exhaust
Type	Double
Material	Silicon Steel
Number Per Cylinder	2
Rotation	None
Seat Angle	45 degrees from Vertical
Seat Insert Material	Sintered Steel
Head Diameter - in	31 mm	1.22 in
Stern Diameter - in	7 mm	0.28 in
Lift - in	9.62 mm	0.379 in
Valve System
Valve Face Angle - Production Value	45 degrees
Valve Margin - Production Value
Intake	1.2 mm	0.0472 in
Exhaust	1.0 mm	0.0394 in
Valve Margin - Service Limit
Intake	0.88 mm	0.0346 in
Exhaust	0.73 mm	0.0287 in
Valve Clearance - Production Value	0.3 mm	0.0118 in
Valve Guide Inside Diameter - Intake - Service Limit	7.09 mm	0.2791 in
Valve Guide Inside Diameter - Intake - Production Value	7.000-7.015 mm	0.2755-0.2762 in
Valve Guide Inside Diameter - Exhaust - Service Limit	7.16 mm	0.2819 in
Valve Guide Inside Diameter - Exhaust - Production Value	7.000-7.015 mm	0.2755-0.2762 in
Valve Depression - Exhaust - Service Limit	2 mm	0.0787 in
Valve Depression - Exhaust - Production Value	0.9 mm	0.0354 in
Valve Depression - Intake - Service Limit	2.5 mm	0.0984 in
Valve Depression - Intake - Production Valve	0.6 mm	0.0236 in
Valve Rocker Arm Ratio - Exhaust	1.69:1
Valve Rocker Arm Ratio - Intake	1.36:1
Valve Seat Angle - Production Value	45 degrees
Valve Contact Width - Exhaust - Service Limit	2.5 mm	0.0984 in
Valve Contact Width - Exhaust - Production Value	2.1 mm	0.0827 in
Valve Contact Width - Intake - Service Limit	2.5 mm	0.0984 in
Valve Contact Width - Intake - Production Value	2.1 mm	0.0827 in
Valve Spring Free Length - Production Value	56.6 mm	2.2283 in
Valve Spring Squareness - Service Limit	2.0 mm	0.0787 in
Valve Spring Installed Height - Exhaust - Production Value	41 mm	1.6142 in
Valve Spring Installed Height - Intake - Production Value	41 mm	1.6142 in
Valve Spring Tension - Exhaust - Service Limit	275 N at 41 mm	61.8 lb at 1.61 in
Valve Spring Tension - Exhaust - Production Value	315-363 N at 41 mm	71.0-81.6 lb at 1.61 in
Valve Spring Tension - Intake - Service Limit	306 N at 41 mm	68.8 lb at 1.61 in
Valve Spring Tension - Intake - Production Value	315-363 N at 41 mm	71.0-81.6 lb at 1.61 in
Valve Stem Outside Diameter - Intake - Service Limit	6.89 mm	0.2713 in
Valve Stem Outside Diameter - Intake - Production Value	6.952-6.970 mm	0.2737-0.2744 in
Valve Stem Outside Diameter - Exhaust - Service Limit	6.91 mm	0.2720 in
Valve Stem Outside Diameter - Exhaust - Production Value	6.942-6.962 mm	0.2734-0.2741 in
Valve Stem Clearance - Exhaust - Service Limit	0.20 mm	0.0079 in
Valve Stem Clearance - Exhaust - Production Value	0.038-0.071 mm	0.0015-0.0028 in
Valve Stem Clearance - Intake - Service Limit	0.20 mm	0.0079 in
Valve Stem Clearance - Intake - Production Value	0.030-0.063 mm	0.0012-0.0025 in
Valve Stem Seal Installed Height - Measured from the Top of the Cylinder Head to the Bottom of the Valve Stem Seal - Production Value	6.05 mm	0.2382 in
Cooling
Water Pump Type	Centrifugal
Capacity @ Engine RPM	270 L/min @ 3172 RPM
Pump Bearing Type	Shaft Bearing
Thermostat Type	Wax Pellet
Number of Thermostats	2
Drive System	Gear
Valve Opening Temperature
Thermostat 1	82°C	180°F
Thermostat 2 - Jiggle Valve	85°C	185°F
Full Open Temperature	110°C	230°F
Turbocharger Coolant Bypass Valve	60°C	140°F
Lubrication
Type - Main Connecting Rod, Camshaft Bearings, Rocker Arms and Rocker Arm Shaft	Pressurized
Type - Camshaft Lobes, Connecting Rod Bushings, Valve Lifters, Piston Pins, Timing Gear and Cylinder Walls	Splash
Oil Pump, Type	Gear
Oil Pressure-HOT-at Idle	98 kPa	14 psi
Oil Capacity-w/Filter Change	10 qt, 9.5 L
Oil Capacity-w/o Filter Change	9.2 qt, 8.7 L
Oil Filter Type	Full-Flow Throwaway Type
Oil Intake	Suction Bell, Front Sump
Oil Seal	Axial Type
Oil Cooler	Water Cooled Corrugated Fin
Oil Relief Valve Opening Pressure	441 kPa	64 psi
Piston Cooling Jet Valve Opening Pressure	196 kPa	29 psi
Air Intake System
Turbocharger	Yes
Turbo Boost	18 psi @ Peak Torque
Charge Air Cooler	Charge Air Cooled
Air Cleaner	Panel Element A1300 or A1306C for HD Usage
Fuel System
Lift Pump	Gear Type, Integral
Injector Pump, Pump Model	Bosch
Type	Common Rail
Drive	Gear
Fuel Filter	Number Used = 1
Type	Full Flow, Paper Element
Location	Right Hand Side of Engine
Fuel Shut-Off	Electronic
Fuel Injector Type	Electronic Injector
Timing Advance	Programmed
Turbocharger
Axial Play - maximum	0.11 mm	0.0043 in
Manufacturer	Ishikawajima Harima Industries
Model	RHG6
Radial Play - maximum	0.20 mm	0.0079 in