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Crank bolt torque

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Old 12-03-2016, 03:08 AM   #1
MindBend
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Default Crank bolt torque

Finishing up an IW Harmonic Balancer and looking for crank bolt torque specs. Anyone have the info from Tech Manual?
I assume its a torque to yield bolt.

Surprisingly very little data on here about it.

Thx
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Old 12-03-2016, 09:38 AM   #2
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Crankshaft Balancer Bolt – Installation Pass with Used Bolt – to Ensure the Balancer is Completely Installed
330 Y
243 lb ft

Crankshaft Balancer Bolt New Bolt with Flanged Head (1)

•First Pass
150 Y
111 lb ft

•Second Pass
Loosen 360 degrees

•Third Pass
80 Y
59 lb ft

•Final Step
125 degrees

or

Crankshaft Balancer Bolt New Bolt with Retained Rotating Washer (1)

•First Pass
150 Y
111 lb ft

•Second Pass
Loosen 360 degrees

•Third Pass
80 Y
59 lb ft

•Final Step
200 degrees

Last edited by sycraft; 12-03-2016 at 09:43 AM.
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Old 12-03-2016, 09:41 AM   #3
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2016 Chevrolet Corvette | Corvette Service Manual 8766452 | Engine/Propulsion | Engine Mechanical - 6.2L LT1 LT4 | Specifications | Document ID: 3952187
--------------------------------------------------------------------------------

Fastener Specifications
Fastener Specifications Application
Specification

Metric
English

Accessory Drive Belt Tensioner Bolt - Lower
22 Y
16 lb ft

Accessory Drive Belt Tensioner Pulley Bolt
58 Y
43 lb ft

Supercharger Belt Idler Pulley Bolts – All
58 Y
43 lb ft

Automatic Transmission Flex Plate Bolts (1)

•First Pass
15 Y
11 lb ft

•Second Pass
30 Y
22 lb ft

•Final Pass
45 degrees

Flywheel Bolts (1)

•First Pass
15 Y
11 lb ft

•Second Pass
30 Y
22 lb ft

•Final Pass
45 degrees

Camshaft Position (CMP) Actuator Magnet Bolts
10 Y
89 lb in

Camshaft Position (CMP) Actuator Solenoid Valve (1)

•First Pass
65 Y
48 lb ft

•Final Pass
90 degrees

Camshaft Position (CMP) Sensor Bolt
25 Y
18 lb ft

Camshaft Position (CMP) Sensor Wire Harness Bolt
10 Y
89 lb in

Camshaft Retainer Bolts – TORX Head Bolts
15 Y
11 lb ft

Connecting Rod Bolts (1)

•First Pass
20 Y
15 lb ft

•Final Pass
85 degrees

Coolant Temperature Sensor
20 Y
15 lb ft

Crankshaft Balancer Bolt – Installation Pass with Used Bolt – to Ensure the Balancer is Completely Installed
330 Y
243 lb ft

Crankshaft Balancer Bolt New Bolt with Flanged Head (1)

•First Pass
150 Y
111 lb ft

•Second Pass
Loosen 360 degrees

•Third Pass
80 Y
59 lb ft

•Final Step
125 degrees

Crankshaft Balancer Bolt New Bolt with Retained Rotating Washer (1)

•First Pass
150 Y
111 lb ft

•Second Pass
Loosen 360 degrees

•Third Pass
80 Y
59 lb ft

•Final Step
200 degrees

Crankshaft Bearing Cap Bolts (1)

•Inner Bearing Cap Bolts - First Pass in Sequence (1)
20 Y
15 lb ft

•Inner Bearing Cap Bolts - Final Pass in Sequence (1)
110 degrees

•Outer Bearing Cap Bolts - First Pass in Sequence
20 Y
15 lb ft

•Outer Bearing Cap Bolts - Final Pass in Sequence
80 degrees

•Bearing Cap Side Bolts – First Pass in Sequence
25 Y
18 lb ft

•Bearing Cap Side Bolts – Final Pass in Sequence
60 degrees

Crankshaft Oil Deflector Bolts
10 Y
89 lb in

Crankshaft Position (CKP) Sensor Bolt
25 Y
18 lb ft

Crankshaft Rear Oil Seal Housing Bolts
25 Y
18 lb ft

Cylinder Head Bolts (1)

•Cylinder Head Bolts - Internal Hex – LH Cylinder Head forwardmost fastener - First Pass in Sequence
80 Y
59 lb ft

•Cylinder Head Bolts – Internal Hex – LH Cylinder Head forwardmost fastener - Second Pass in Sequence
90 degrees

•Cylinder Head Bolts - Internal Hex – LH Cylinder Head forwardmost fastener - Final Pass in Sequence
40 degrees

•Cylinder Head Bolts – Standard Hex - First Pass in Sequence
80 Y
59 lb ft

•Cylinder Head Bolts – Standard Hex - Second Pass in Sequence
90 degrees

•Cylinder Head Bolts – Standard Hex - Final Pass in Sequence
60 degrees

Engine Block Coolant Drain Hole Plug
60 Y
44 lb ft

Engine Block Coolant Heater
50 Y
37 lb ft

Engine Block Oil Gallery Plugs – Front
25 Y
18 lb ft

Engine Block Oil Gallery Plugs – Rear
30 Y
22 lb ft

Engine Oil Cooler Adapter to Oil Pan Bolt (M6)
10 Y
89 lb in

Engine Oil Cooler Adapter to Oil Pan Bolt (M8)
25 Y
18 lb ft

Engine Oil Cooler Coolant Fitting
35 Y
26 lb ft

Engine Oil Cooler Core Bolt
25 Y
18 lb ft

Engine Wiring Harness Bolt (Rear Engine Channel)
10 Y
89 lb in

Engine Wiring Harness Jumper Bracket Bolt
25 Y
18 lb ft

Exhaust Manifold Bolts

•Exhaust Manifold Bolts– If installing on existing cylinder head
23 Y
17 lb ft

•Exhaust Manifold Bolts– If installing on NEW cylinder head
27 Y
20 lb ft

Exhaust Manifold Heat Shield Bolts
10 Y
89 lb in

Front Cover Bolts
25 Y
18 lb ft

Low Pressure Fuel Feed Pipe to Rocker Arm Cover Bolt
10 Y
89 lb in

Fuel Pump Bolts
25 Y
18 lb ft

Fuel Rail Fuel Pressure Sensor
33 Y
24 lb ft

High Pressure Fuel Feed Pipe Fittings (1)
28 Y
21 lb ft

Low Pressure Fuel Feed Pipe to Rocker Arm Cover Bolt
10 Y
89 lb in

Fuel Injection Fuel Rail Bolts
25 Y
18 lb ft

Fuel Injection Fuel Rail Crossover Pipe Bolt
10 Y
89 lb in

Generator Bracket Bolts
50 Y
37 lb ft

Ignition Coil Bracket-to-Valve Rocker Arm Cover Bolts
10 Y
89 lb in

Intake Manifold Bolts

•First Pass in Sequence
5 Y
44 lb in

•Final Pass in Sequence
10 Y
89 lb in

Intake Manifold Cover Studs
4.5 Y
40 lb in

Intake Manifold Cover Bolts
4.5 Y
40 lb in

Knock Sensor Bolts
25 Y
18 lb ft

Knock Sensor Heat Shield Bolt
25 Y
18 lb ft

Oil Filter
3/4 to 1 full turn after gasket makes contact with the sealing surface on the filter mounting flange

Oil Filter Fitting
55 Y
41 lb ft

Oil Level Indicator Tube Bolt
10 Y
89 lb in

Oil Pan Cover Bolts
10 Y
89 lb in

Oil Pan Drain Plug
25 Y
18 lb ft

Oil Pan Bolts – Oil Pan-to-Rear Housing
12 Y
106 lb in

Oil Pan Bolts – Oil Pan-to-Rear Housing
12 Y
106 lb in

Oil Pan Bolts – Oil Pan-to-Engine Block and Oil Pan-to-Front Cover
25 Y
18 lb ft

Oil Pressure Sensor
35 Y
26 lb ft

Oil Level Sensor Bolts
10 Y
89 lb in

Oil Pump Screen Bolts
10 Y
89 lb in

Oil Pump-to-Engine Block Bolts
25 Y
18 lb ft

Positive Crankcase Ventilation Valve (LT1)
6 Y
53 lb in

Positive Crankcase Ventilation Valve (LT4)
10 Y
89 lb in

Spark Plugs
20 Y
15 lb ft

Supercharger Belt Idler Pulley Bracket Bolts
25 Y
18 lb ft

Charge Air Cooler Cover Bolts
10 Y
89 lb in

Supercharger to Block Bolts

•First Pass in Sequence
10 Y
89 lb in

•Final Pass in Sequence
10 Y
89 lb in

Supercharger Water Manifold Bolts
10 Y
89 lb in

Charge Air Regulator Solenoid Valve Bolt
10 Y
89 lb in

Supercharger Bypass Valve Actuator Bolt
27 Y
20 lb ft

Map Sensor Bolt – Supercharger
10 Y
89 lb in

Supercharger Inlet Air Pressure and Temperature Sensor Bolt
10 Y
89 lb in

Throttle Body Bolts
10 Y
89 lb in

Map Sensor Bolt – Intake Manifold
4.5 Y
40 lb in

Evap Purge Valve Bolt
10 Y
89 lb in

Timing Chain Tensioner Bolts
25 Y
18 lb ft

Valve Lifter Guide Bolts
12 Y
106 lb in

Valve LIfter Follower Guide Bolt
12 Y
106 lb in

Valve Lifter Oil Manifold Bolts

•First Pass in Sequence
15 Y
11 lb ft

•Final Pass in Sequence
30 Y
22 lb ft

Valve Lifter Oil Manifold Filter Plug
30 Y
22 lb ft

Valve Rocker Arm Bolts
30 Y
22 lb ft

Valve Rocker Arm Cover Bolts - In Sequence
10 Y
89 lb in

Water Outlet Housing Bolts
10 Y
89 lb in

Water Pump Impeller Bolts
10 Y
89 lb in

Engine Coolant Manifold Bolts
25 Y
18 lb ft

Starter Heat Shield Bolt - Side
10 Y
89 lb in

Starter Heat Shield Bolt - Rear
25 Y
18 lb ft

1. Use NEW fastener.
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Old 12-29-2016, 08:02 AM   #4
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Wow! Thanks for all the detail. Getting to it today. I've seen people talk about loktite etc. on the Balancer bolt. Any sense to this? Thx again for help!
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Old 12-29-2016, 09:55 AM   #5
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On a A&A supercharge install using their longer bolt torque is 130ftlbs
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Old 12-30-2016, 10:09 AM   #6
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Good info! I called IW right before I saw this and they said the same, "130 ft pounds". Easy--6th gear, parking brake and wrapped but around the pulley. Worked great!
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