TORQUE SPECS FOR CUMMINS ISC, QSC, ISL, & QSL

April 10, 2023

CYLINDER HEAD

PART/MATERIAL/COLOR LENGTH TORQUE VALUE IN NM [ FT-LB ]
CYLINDER HEAD CAPSCREWS (CAPS FUEL SYSTEM) N/A 1. 50 N•M [ 37 FT-LB ]
2. 148 N•M [ 109 FT-LB ]
3. 148 N•M [ 109 FT-LB ]
4. ADVANCE 90 DEGREES.
CYLINDER HEAD CAPSCREWS (COMMON RAIL FUEL SYSTEM) N/A 1. 50 N•M [ 37 FT-LB ]
2. 150 N•M [ 111 FT-LB ]
3. LOOSEN ALL CAPSCREWS
4. 115 N•M [ 85 FT-LB ]
5. 115 N•M [ 85 FT-LB ]
6. ADVANCE 120 DEGREES.
CYLINDER HEAD CAPSCREWS (CYLINDER BLOCK SERIAL NUMBERS: 9826882 & HIGHER) N/A 1. 50 N•M [ 37 FT-LB ]
2. 150 N•M [ 111 FT-LB ]
3. LOOSEN ALL CAPSCREWS
4. 115 N•M [ 85 FT-LB ]
5. 115 N•M [ 85 FT-LB ]
6. ADVANCE 150 DEGREES.

 

PISTON AND CONNECTING ROD ASSEMBLY

PART/MATERIAL/COLOR LENGTH TORQUE VALUE IN NM [ FT-LB ]
ENGINES WITH CONNECTING ROD STUDS AND NUTS N/A 1. 60 N•M [ 44 FT-LB ]
2. LOOSEN CAPSCREWS
3. 70 N•M [ 52 FT-LB ]
4. ADVANCE 90 DEGREES
ENGINES WITH CONNECTING ROD CAPSCREWS N/A 1. 60 N•M [ 44 FT-LB ]
2. LOOSEN CAPSCREWS
3. 70 N•M [ 52 FT-LB ]
4. ADVANCE 60 DEGREES

INJECTOR

PART/MATERIAL/COLOR LENGTH TORQUE VALUE IN NM [ FT-LB ]
INJECTOR HOLD DOWN CLAMP CAPSCREWS N/A 10 N•M [ 89 IN-LB ]

CRANKSHAFT

PART/MATERIAL/COLOR LENGTH TORQUE VALUE IN NM [ FT-LB ]
MAIN BEARING CAP CAPSCREWS N/A 50 N•M [ 37 FT-LB ]

PART/MATERIAL/COLOR LENGTH TORQUE VALUE IN NM [ FT-LB ]
MAIN BEARING CAPSCREWS 128 MM [5 IN] 1. 50 N•M [ 37 FT-LB ]
2. 95 N•M [ 70 FT-LB ]
3. ROTATE 60 DEGREES
MAIN BEARING CAPSCREWS 135 MM [5.3 IN] 1. 170 N•M [ 125 FT-LB ]
2. LOOSEN ALL CAPSCREWS
3. 50 N•M [ 37 FT-LB ]
4. ROTATE 120 DEGREES

OIL COOLER

PART/MATERIAL/COLOR LENGTH TORQUE VALUE IN NM [ FT-LB ]
OIL COOLER CAPSCREWS N/A 1. 15 N•M [ 11 FT-LB ]
2. 33 N•M [ 24 FT-LB ]

 

 

ROCKER LEVER

PART/MATERIAL/COLOR LENGTH TORQUE VALUE IN NM [ FT-LB ]
ROCKER LEVER PEDESTALL CAPSCREWS N/A 65 N•M [ 48 FT-LB ]
ENGINE BRAKE OIL SUPPLY CAPSCREWS ON INTAKE ROCKER LEVERS 1 AND 4 N/A 65 N•M [ 48 FT-LB ]
EXHAUST ROCKER LEVER CAPSCREWS N/A 65 N•M [ 48 FT-LB ]
PEDESTAL CAPSCREWS IN CYLINDERS 2, 3, 5 & 6 INTAKE ROCKER PEDESTALS N/A 65 N•M [ 48 FT-LB ]
THREADED SPACERS INTO THE CYLINDER HEAD N/A 24 N•M [ 212 IN-LB ]
ROCKER LEVER LOCK NUT N/A 24 N•M [ 212 IN-LB ]
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