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LS LT Engine Torque Specs

LS LT Engine Torque Specs

Michigan Motorsports

Fastener Torque Specs for 1997-2014 LS Gen 3 Gen 4

LS1 LS2 LS3 LS6 L99 LSA L92 L9H L94 L76 L77 LY6 L96 LY5 LMG LMF LH6 LC9 LY2 L20 L33 LQ4 LQ9 LR4 LM7 L59 LS4 LH8 LH9 4.8L 5.3L 5.7L 6.0L 6.2L

These specifications apply to OEM fasteners or stock replacement fasteners only.

Camshaft Retainer Plate (Standard style bolts): 18 lb-ft

Camshaft Retainer Plate (Countersunk Torx/Hex Bolts): 11 lb-ft

Camshaft Sprocket (3-Bolt Cam) 26 lb-ft

Camshaft Sprocket (Single Bolt Cam) First Pass: 55 lb-ft, Second Pass: + 50 Degrees

Connecting Rod Bolts:

• First Design(Only used on some 1997-1999 engines, does not have retaining sleeve like later bolts): First Pass: 15 lb-ft, Second Pass: + 60 Degrees
• Second Design (most common): First Pass: 15 lb-ft, Second Pass: + 85 Degrees

Coolant Crossover Tube/Steam Port Caps: 106 lb-inch

Coolant Temperature Sensor: 15 lb-ft

Crankshaft Balancer Bolt:

• Step 1 (Installation pass to ensure balancer is fully seated): 240 lb-ft
• Step 2 (Use a NEW bolt after installation pass is completed and bolt removed): First Pass: 37 lb-ft, Second Pass: + 140 Degrees

Cylinder Heads(See Sequence Diagram Below):

-1997 to Early 2004 Blocks (8 longer and 2 shorter 11mm bolts per head) MM # K6100

• M11 Bolts First Pass: 22 lb-ft
• M11 Bolts Second Pass: + 90 Degrees
• M11 Bolts Third Pass: + 90 Degrees on the 8 longer bolts, 50 Degrees on the 2 shorter bolts
• M8 Bolts (after all 3 passes are done on M11 bolts): 22 lb-ft

-Mid 2004 and Later Blocks (10 bolts all same length per head) MM # K7100

• M11 Bolts First Pass: 22 lb-ft
• M11 Bolts Second Pass: + 90 Degrees
• M11 Bolts Third Pass: + 70 Degrees
• M8 Bolts (after all 3 passes are done on M11 bolts): 22 lb-ft

Intake Manifold (See Sequence Diagram Below):

• First Pass: 44 lb-inch
• Second Pass: 89 lb-inch

Exhaust Manifold to Cylinder Head: 18 lb-ft

Flywheel/Flexplate: First Pass: 15 lb-ft, Second Pass: 37 lb-ft, Third Pass: 74 lb-ft

Main Bearing Caps (See Sequence Diagram Below):

• Main cap inner bolts - First Pass: 15 lb-ft
• Main cap inner bolts - Second Pass: + 80 Degrees
• Main cap outer studs - First Pass: 15 lb-ft
• Main cap outer studs - Second Pass: + 53 Degrees
• Main cap side bolts - 18 lb-ft (After completing both passes on the inner and outer fasteners)

Lifter Guide Trays: 89 lb-inch

Oil Drain Plug: 18 lb-ft

Oil Pan: M8 Bolts: 18 lb-ft, M6 Bolts at rear of pan: 106 lb-inch

Oil Pickup tube to Oil Pump: 106 lb-inch

Oil Pump to Engine Block: 18 lb-ft

Rear Cover: 18 lb-ft

Rocker Arms: 22 lb-ft

Timing Cover: 18 lb-ft

Timing Chain Damper: 18 lb-ft

Thermostat Housing: 11 lb-ft

Throttle Body: 89 lb-inch

Valley Cover: 18 lb-ft

Valve Covers: 106 lb-inch

Water Pump: 22 lb-ft

Windage Tray Nuts: 18 lb-ft

Fastener Torque Specs for 2014+ LT Engines

LT1 LT4 L83 L86 L84 L87 L82 L8T L8B 5.3 6.2 6.6

Camshaft Retainer Plate (Countersunk Torx/Hex Bolts): 11 lb-ft

Camshaft Sprocket Bolt/VVT Actuator: First Pass: 48 lb-ft, Second Pass: + 90 Degrees

Connecting Rod Bolts: First Pass: 15 lb-ft, Second Pass: + 85 Degrees

Crankshaft Balancer Bolt(With solid Flanged Head): First Pass: 89 ln-ft, Second Pass: Loosen 360 Degrees, Third Pass: 59 lb-ft, Final Pass: +125 Degrees

Crankshaft Balancer Bolt(With Separate Rotating Washer): First Pass: 89 lb-ft, Second Pass: Loosen 360 Degrees, Third Pass: 59 lb-ft, Final Pass: +200 Degrees

Cylinder Head Bolts (See sequence diagram below):

Note different spec for final pass on the one allen bolt:

• First Pass - All 20 Bolts in Sequence: 59 lb ft
• Second Pass - All 20 Bolts in Sequence: +90 degrees
• Third/Final Pass - 19 Standard Bolts in Sequence: +60 degrees
• Third/Final Pass - Allen Bolt on LH Cylinder Head, forwardmost fastener: +40 degrees

Exhaust Manifold Bolts: If installing on existing cylinder head: 17 lb-ft

Exhaust Manifold Bolts: If installing on NEW cylinder head: 20 lb-ft

Flex Plate to Crankshaft Bolts: First Pass: 22 lb-ft, Second Pass: +45 Degrees

Flywheel to Crankshaft Bolts: First Pass: 22 lb-ft, Second pass: +45 degrees

Front Engine Cover: 18 lb-ft

High Pressure Fuel Pump: 18 lb-ft

Intake Manifold (See Sequence Diagram Below)

• First Pass: 44 lb-inch
• Second Pass: 89 lb-inch

Main Bearing Caps (See Sequence Diagram Below)

• Main Cap Inner Bolts - First Pass: 15 lb-ft
• Main Cap Inner Bolts - Second Pass: + 110 Degrees
• Main Cap Outer Studs - First Pass: 15 lb-ft
• Main Cap Outer Studs - Second Pass: + 80 Degrees
• - After Inner and Outer main studs are torqued, then do the side bolts:
• Main Cap side bolts - First Pass: 22 lb-ft
• Main Cap side bolts - Second Pass: +60 Degrees

Oil Cooler Adapter: 106 lb-inch

Oil Drain Plug: 18 lb-ft

Oil Pan to Rear Cover Bolts: 106 lb-inch

Oil Pan to Engine Block and Front Cover: 18 lb-ft

Oil Pan Lower to Upper Oil Pan Bolts: 88 lb-i nch

Oil Pressure Sensor: 26 lb-ft

Oil Level Sensor: 88 lb-i nch

Oil Pump Pickup Tube Bolts: 88 lb-i nch

Oil Pump to Engine Block: 18 lb-ft

Rear Engine Cover: 18 lb-ft

Rocker Arm Bolts: 22 lb-ft

Spark Plugs: 15 lb-ft

Throttle Body: 88 lb-inch

Timing Chain Tensioner: 18 lb-ft

Timing Cover: 18 lb-ft

Valley Cover Bolts: 18 lb-ft

Valve Cover Bolts: 88 lb-inch

Water Pump to Engine Block: 18 lb-ft

Water Pump Impeller to WP Housing: 88 lb-inch