Isuzu 6RB1 6RB1T Specifications and Torque Values

Isuzu 6RB1 6RB1T Engine Specifications and Torque Values
Tightening Torque Specifications in Ft Lbs, Clearances in MM and Inches , Pressures in PSI ,

6RB1 6RB1T Head Bolts tighten in three stages: 109 Ft lbs + 137 Ft Lbs + 30 degrees
Head Bolt Tightening Sequence:
16 12 3 4 9 13

20 8 5 17

19 7 6 18

15    11 2 1 10 14

Main Bearing Cap Bolts: 283 Ft Lbs
Connecting Rod Bolts Nuts tighten in two stages: 51 Ft Lbs then 75 Ft Lbs
Connecting Rod Bolt Nut Tightening Sequence:
1           4

    3           2

Valve Cover Bolts: 29 Ft Lbs
Intake Manifold Bolts: 22 Ft Lbs
Exhaust Manifold Studs Nuts: 24 Ft Lbs
Water Manifold Studs Nuts: 14 Ft Lbs
Rocker Arm Valve Lash Adjusting Screw Lock Nut: 58 Ft Lbs
Valve Lash Clearance Specification (cold):
Intake Valve 0.6MM or 0.024 Inch   Exhaust Valve 0.6MM or 0.024 Inch
Valve Bridge Adjusting Screw Lock Nut: 41 Ft Lbs
Rocker Arm Shaft Bracket Bolt: 69 Ft Lbs
6RB1 Injector Starting Pressure in PSI range 2840 – 3195
6RB1T Injector Starting Pressure in PSI range 2835 – 3200
Injector Lock Nut Torque: 40 Ft Lbs
Injector Cap Nut Torque: 33 Ft Lbs
Injector Nozzle Nut: 51 Ft Lbs
Injector Hold Down Nut: Size M8 14 Ft Lbs / Size M10 21 Ft Lbs,
Injector Fuel Lines Nut to Injector: 21 Ft Lbs
Injector Fuel Lines Sealing Sleeve Nut against Head: hand tighten
Injector Fuel Lines Nut to Injection Pump: 25 Ft Lbs
Fuel Return Line , Leak off line, Nut to top of injector: 18 Ft Lbs
Fuel Return Line , Leak off line, Hollow Bolt to Cylinder Head Fuel Passage: 18 Ft Lbs
Cylinder Head Fuel Passage Hollow Bolt to Fuel Return Fitting on filter housing: 18 Ft Lbs
Thermostat Cover Studs Nuts: 23 Ft Lbs
Thermostat Lower Housing to Water Pump Bolts: 24 Ft Lbs
Water Pump Intake Housing to Water Pump: 14 Ft Lbs
Water Pump Pulley to Water Pump Shaft: 196 Ft Lbs
Water Pump to Block mounting bolt: 52 Ft Lbs
Water Temperature Switch: 29 Ft Lbs
Water Temperature Sensor: 27 Ft Lbs
Air Boost Pipe to Intake Hollow Bolt: 18 Ft Lbs
Intake Pipe Housing to Intake Manifold Bolts, Studs, Nuts, : Size M8 14 Ft Lbs / Size M10 21 Ft Lbs
Intake Heater to Intake Manifold: 16 Ft Lbs
Fuel Line to Intake Heater: 14 Ft Lbs
Engine Stop Motor, Fuel Shut off, 17 Ft Lbs
Engine Speed Sensor, RPM Sensor, 21 Ft Lbs
Exhaust Manifold to Turbocharger Bolts, Studs, Nuts,: 29 Ft Lbs
Turbocharger Oil Feed Pipe to Turbocharger Bolts: 18 Ft Lbs
Turbocharger Oil Feed Pipe to Oil Feed Hollow Bolt: 31 Ft Lbs
Turbocharger Oil Return Pipe From Turbocharger Bolt: 27 Ft Lbs
Turbocharger Oil Return Pipe to Block Plate Bolts: 18 Ft Lbs
Turbocharger Turbine Housing Clamp Nut: 13 Ft Lbs
V Band Nut Turbocharger to Exhaust Pipe: 12 Ft Lbs
Clamp Nut Turbocharger to Intake Pipe: 12 Ft Lbs
Turbocharger to Exhaust Pipe Studs Nuts: 19 Ft Lbs
Piston Cooling Oil Jet Bolt to Block: 15 Ft Lbs
Oil Pump to Block Bolts: 37 Ft Lbs
Oil Tube Bolts: 15 Ft Lbs
Oil Pickup Screen Tube to Oil Pump Bolts: 15 Ft Lbs
Oil Filter Housing to Block mounting bolts: 30 Ft Lbs
Oil Relief Valve Cap tightening torque: 34 Ft Lbs
Oil Pressure Switch tightening torque: 28 Ft Lbs
Oil Pressure Sensor tightening torque: 26 Ft Lbs
Oil Cooler Housing to Block Bolts: 13 Ft Lbs
Oil Cooler Element to Oil Cooler Housing Bolt: 13 Ft Lbs
Oil Line to Air Compressor Hollow Bolt: 29 Ft Lbs
Oil Line to Injection Pump Bolts: 18 Ft Lbs
Oil Line to Injection Pump Hollow Bolts: 31 Ft Lbs
Input Fuel Line to Fuel Feed Pump Hollow Bolt: 29 Ft Lbs
Fuel Feed Line from Fuel Feed Pump to Injection Pump Hollow Bolt: 29 Ft Lbs
Fuel Filter Housing Hollow Bolts: 29 Ft Lbs
Front Timing Gear Case to Block: Size M10 Bolts 29 Ft Lbs – Size M12 Bolts 50 Ft Lbs
Front Timing Cover to Front Timing Gear Case: 32 Ft Lbs
Cover over Injection Pump Drive Gear bolts studs nuts: 21 Ft Lbs
Injection Pump Drive Gear Nut: 188 Ft Lbs
Timing Gear Oil Spray Jet: 21 Ft Lbs
Idler Gear Bolts: 130 Ft Lbs
Camshaft Gear Nut: 108 Ft Lbs
Front Cam Bearing Flange Bolts: 31 Ft Lbs
Cam Bearing Lock Bolt: 28 Ft Lbs
Cam Bearing half shell fastening bolts 3 Ft Lbs
Tappet Guide Bolt: 23 Ft Lbs
Tappet Roller Bolt 14 Ft Lbs
Oil Pan Plug: 90 Ft Lbs
Oil Pan Bolts: 29 Ft Lbs
Block side cover plates: 15 Ft Lbs
Flywheel Housing to block bolts studs nuts: Size M8 14 Ft Lbs – Size M14 84 Ft Lbs
Flywheel Bolts to Crankshaft tightening torque in 3 stages: 63 Ft Lbs then 60 degrees then 30 degrees
Front Crankshaft Hub Front Crankshaft Nut: 585 Ft Lbs
Front Crankshaft Pulley to Front Crankshaft Hub: 65 Ft Lbs
Damper to Front Crankshaft Pulley: 40 Ft Lbs
Fan Bolts: 27 Ft Lbs
Fan Spacer Bolts: 14 Ft Lbs
Air Compressor Drive Gear Nut: 188 Ft Lbs
Air Line to Air Compressor: 224 Ft Lbs
Air Compressor Mounting Bolts: 29 Ft Lbs
Air Compressor Head Bolts: 19 Ft Lbs
Air Compressor Delivery Valve Retainer: 80 Ft Lbs
Air Compressor Cylinder to Crankcase: 19 Ft Lbs
Air Compressor Connecting Rod Bolt Nut: 17 Ft Llbs
Air Compressor Crankshaft Bearing Holder to Crankcase: 5 Ft Lbs
Coolant Line to Air Compressor Nut: 30 Ft Lbs
Injection Pump Drive Bearing Case attaching bolts: 29 Ft Lbs
Injection Pump Drive Shaft to Injection Pump: 47 Ft Lbs
Injection Pump Drive Coupling Bolts: M8 Size 24 Ft Lbs – M10 Size 35 Ft Lbs
Injection Pump Mounting Bracket Bolts to block: M10 Size 29 Ft Lbs – M14 Size 80 Ft Lbs
Injection Pump to Injection Pump Mounting Bracket Bolts: 29 Ft Lbs
Injection Pump Delivery Valve Holder tighten in three steps:
80 Ft lbs then loosen, 80 Ft lbs then loosen, final 80 Ft lbs.
Injection Pump Plunger and Barrel Assembly Flange to Injection Pump Housing Nuts: 28 Ft Lbs
Governor Housing to Injection Pump Housing Bolts: 14 Ft Lbs
Injection Pump Housing to Injection Pump Camshaft Bearing Holder Bolts: 14 Ft Lbs
Governor Flyweight Nut: 39 Ft Lbs
Main Bearing to Crankshaft oil clearance in MM 0.045-0.120 Limit 0.140
Main Bearing to Crankshaft oil clearance in Inches 0.002-0.005 Limit 0.006
Connecting Rod Bearing to Crankshaft oil clearance in MM 0.035-0.105 Limit 0.130
Connecting Rod Bearing to Crankshaft oil clearance in Inches 0.0014-0.0041 Limit 0.0051
6RB1 6RB1T Intake Valve Lash Clearance (cold) 0.6MM or 0.024 Inch
6RB1 6RB1T Exhaust Valve Lash Clearance (cold) 0.6MM or 0.024 Inch
Intake Valve Stem Diameter in MM 10.92-10.94 Limit 10.85
Intake Valve Stem Diameter in Inches 0.4302-0.4310 Limit 0.4275
Exhaust Valve Stem Diameter in MM 10.90-10.92 Limit 10.85
Exhaust Valve Stem Diameter in Inches .4294-.4302 Limit .4275
Intake Valve Thickness in MM 3.3 Limit 2.8
Intake Valve Thickness in Inches 0.130 Limit 0.110
Exhaust Valve Thickness in MM 2.0 Limit 1.5
Exhaust Valve Thickness in Inches 0.079 Limit 0.059
Intake Valve Protrusion above cylinder head surface in MM .5 Limit (1.5) for type A piston round combustion chamber
Intake Valve Protrusion above cylinder head surface in Inches 0.20 Limit (0.60) for type A piston round combustion chamber
Exhaust Valve Protrusion above cylinder head surface in MM 1.0 Limit 3.0 for type A piston round combustion chamber
Exhaust Valve Protrusion above cylinder head surface in Inches 0.040 Limit 0.120 for type A piston round combustion chamber
Intake Valve Protrusion above cylinder head surface in MM 1.8 Limit 3.8 for type B piston square combustion chamber
Intake Valve Protrusion above cylinder head surface in Inches .071 Limit .150 for type B piston square combustion chamber
Exhaust Valve Protrusion above cylinder head surface in MM 1.6 Limit 3.6 for type B piston square combustion chamber
Exhaust Valve Protrusion above cylinder head surface in Inches 0.63 Limit .142 for type B piston square combustion chamber
Intake Valve to Intake Valve Seat contact width in MM 1.9 Limit 3.4
Intake Valve to Intake Valve Seat contact width in Inches .075 Limit .134
Exhaust Valve to Exhaust Valve Seat contact width in MM 2.0 Limit 4.3
Exhaust Valve to Exhaust Valve Seat contact width in Inches .079 Limit .169
Intake Valve Stem to Intake Valve Guide in MM 0.05-0.10 Limit 0.20
Intake Valve Stem to Intake Valve Guide in Inches 0.020-0.004 Limit 0.008
Exhaust Valve Stem to Exhaust Valve Guide in MM 0.08-0.10 Limit 0.25
Exhaust Valve Stem to Exhaust Valve Guide in Inches 0.003-0.004 Limit 0.010
Intake Valve Spring free length with type A pistons in MM 66.4 Limit 62.0
Intake Valve Spring free length with type A pistons in Inches 2.62 Limit 2.44
Exhaust Valve Spring free length with type A pistons in MM 66.4 Limit 62.0
Exhaust Valve Spring free length with type A pistons in Inches 2.62 Limit 2.44
Intake Valve Spring free length with type B pistons in MM 69.0 Limit 66.4
Intake Valve Spring free length with type B pistons in Inches 2.72 Limit 2.62
Exhaust Valve Spring free length with type B pistons in MM 73.6 Limit 69.0
Exhaust Valve Spring free length with type B pistons in Inches 2.90 Limit 2.72
Clearance between valve bridge and valve bridge guide in MM .020-.047 Limit 0.100
Clearance between valve bridge and valve bridge guide in Inches .0008-.0019 Limit .0040
Timing Idler Gear End Play in MM 0.003-0.100 Limit 0.200
Timing Idler Gear End Play in Inches 0.00010-0.0040 Limit 0.0080
Timing Gears Backlash in MM 0.125-0.200 Limit 0.250
Timing Gears Backlash in Inches 0.0049-0.0078 Limit 0.010
Crankshaft Thrust Washer End Play in MM 0.04-0.19 Limit 0.30
Crankshaft Thrust Washer End Play in Inches 0.0016-0.0075 Limit 0.118
Tappet diameter in MM 29.94-29.97 Limit 29.90
Tappet diameter in Inches 1.180-1.181 Limit 1.178
Tappet Roller Height in MM 2.5 Limit 1.5
Tappet Roller Height in Inches .099 Limit 0.59
Tappet to Tappet Guide clearance in MM .03-.09 Limit .15
Tappet to Tappet Guide clearance in Inches .0012-.0035 Limit .0059
Push rod run-out ( bend ) in MM Limit .5
Push rod run-out ( bend ) in Inches Limit .02
Rocker Arm Shaft outside diameter in MM 29.98-30.00 Limit 29.85
Rocker Arm Shaft outside diameter in Inches 1.181-1.182 Limit 1.176
Rocker Arm Bushing inside diameter in MM 30.03-30.08 Limit 30.10
Rocker Arm Bushing inside diameter in Inches 1.182-1.184 Limit 1.185
Rocker Arm Bushing to Rocker Arm Shaft Clearance in MM .03-.10 Limit .20
Rocker Arm Bushing to Rocker Arm Shaft Clearance in Inches .0012-.0040 Limit .0080
Idler Gear Shaft Diameter in MM 75.95-75.96 Limit 75.83
Idler Gear Shaft Diameter in Inches 2.992-2.993 Limit 2.998
Idler Gear to Idler Gear Shaft clearance in MM .04-.10 Limit .20
Idler Gear to Idler Gear Shaft clearance in Inches .0016-.0040 Limit .0080
Camshaft Lobe Height in MM 7.53 Limit 7.03
Camshaft Lobe Height in Inches 2.96 Limit 2.77
#1 Camshaft Journal Diameter in MM 55.94-55.97 Limit 55.91
#2 through #7 Camshaft Journal Diameter in MM 43.95-43.98 Limit 43.92
#1 Camshaft Journal Diameter in Inches 2.204-2.205 Limit 2.203
#2 through #7 Camshaft Journal Diameter in Inches 1.732-1.733 Limit 1.730
Camshaft Gear to Camshaft Thrust Plate, Camshaft end play, in MM .06 Limit .20
Camshaft Gear to Camshaft Thrust Plate, Camshaft end play, in Inches .002 Limit .008
Cylinder Liner Inside Diameter in MM Nominal: 135.00 Limit: 136.50
Cylinder Liner Inside Diameter in Inches Nominal: 5.319 Limit: 5.378
Cylinder Liner Protrusion above block surface in MM: .05-.10
Cylinder Liner Protrusion above block surface in Inches: .0020-.0039
Maximum difference between cylinder liner protrusions in MM .02
Maximum difference between cylinder liner protrusions in Inches .0008
6RB1 Piston to Cylinder wall clearance in MM .208-.227
6RB1 Piston to Cylinder wall clearance in Inches .0082-.0089
6RB1T Piston to Cylinder wall clearance in MM .224-.243
6RB1T Piston to Cylinder wall clearance in Inches .0088-.0096

Click here to download or print this information.

For more details the Isuzu 6RB1 6RB1T Engine Workshop Manual is available here: 6RB1 6RB1T Workshop Manual

Contact us for Engine Parts for heavy equipment, Isuzu Diesel, Mitsubishi Diesel, Hino Diesel, Nissan Diesel,
Mercedes Benz Diesel,

Heavy Equipment Restoration Parts LLC
4730 118th Ave
Fennville Michigan 49408 USA
Phone: 269 673 1638
Fax: 269 673 7226
email: EngineParts@HeavyEquipmentRestorationParts.com
Website: www.HeavyEquipmentRestorationParts.com