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Wrangler YJ Engine Torque Specs

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Shop Wrangler YJ Engine Parts

When upgrading components of your engine make sure to torque your nuts and bolts to the manufacturer specification.

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2.5L Engine Torque Specs

If you are going to be rebuilding your 2.5 liter engine, it would be a good idea to keep these specs handy.

Description

Specification

Camshaft Sprocket Bolt

80 ft-lbs

Crankshaft Pulley To Vibration Damper Bolts

20 ft-lbs

Cylinder Head Bolts (1987-1988)

Bolt 8 = 75 ft-lbs

Rest = 85 ft-lbs

Cylinder Head Bolts (1989-1995)

Bolt 8 = 100 ft-lbs

Rest = 110 ft-lbs

Flexplate To Crankshaft Bolts

40 ft-lbs 60 Degrees

Flywheel To Crankshaft Bolts

50 ft-lbs 60 Degrees

Intake Manifold To Cylinder Head Bolts

23 ft-lbs

Main bearing caps

40 Then 70 Then 80 ft-lbs

Oil Pan Mounting Bolts 1/4

7 ft-lbs

Oil Pan Mounting Bolts 5/16

11 ft-lbs

Oil Pump Bolts Short

10 ft-lbs

Oil Pump Bolts Long

17 ft-lbs

Rocker Arm Cap Screws

19 ft-lbs

Valve Cover Bolts With RTV

55 in-lbs

Valve Cover Bolts With Pre-Cured Gasket

44 in-lbs

Timing Chain Tensioner To Block Bolt

14 ft-lbs

Timing Chain Cover To Block Bolts

5 ft-lbs

Timing Chain Cover To Block Nuts

16 ft-lbs

Vibration Damper Bolt (Lubricated)

80 ft-lbs

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4.0L & 4.2L Engine Torque Specs

If you are going to be rebuilding your 4.0 or 4.2 liter engine, it would be a good idea to keep these specs handy.

Description

Specification

Camshaft Sprocket Bolt

50 ft-lbs

Crankshaft Pulley To Vibration Dampener Bolts

20 ft-lbs

Cylinder Head Bolts 4.2L

85 ft-lbs

Cylinder Head Bolts 4.0L

First 22 Then 45 Then 45

Then 100 ft-lbs For Bolt 11

Then 110 ft-lbs For Remaining Bolts

Flywheel/Flexplate bolts

105 ft-lbs

Oil Pan Mounting Bolts 1/4 x 20

84 in-lbs

Oil Pan Mounting Bolts 5/16 x 18

132 in-lbs

Oil Pump Mounting Bolt Short

120 in-lbs

Oil Pump Mounting Bolt Long

17 ft-lbs

Rear Main Bearing Cap Bolts

80 ft-lbs

Rocker Arm Bolts

19 ft-lbs

Tensioner Bracket-To-Block Bolts

14 ft-lbs

Timing Chain Cover-To-Block Bolts

60 in-lbs

Timing Chain Cover-To-Block Studs

16 ft-lbs

Valve Cover Bolts With RTV

28 in-lbs

Valve Cover With Permanent Gasket

55 in-lbs

Vibration Damper Center Bolt (Lubricated)

- 80 ft-lbs

All Engines Torque Specs

These specs apply to all engines used in YJ Wranglers, ranging from spark plugs to connecting rod caps.

Description

Specification

Spark Plugs

27 ft-lbs

Intake and Exhaust Manifold Retaining Bolts/Nuts

(All model years but 1989)

Bolts 1-5 8-11 = 23 ft-lbs

 

Bolts 6 7 =17 ft-lbs

Intake and Exhaust Manifold Retaining Bolts/Nuts

(1989)

Bolts 1 2 = 30 ft-lbs

 

Bolts 3-12 = 23 ft lbs

Carburetor Mounting Nuts/Bolts

14 ft-lbs

Throttle Body Mounting Nuts/Bolts

14 ft-lbs

Balance Shaft Assembly Chain Cover

105 in-lbs

Balance Shaft Assembly Carrier To Block Bolts

40 ft-lbs

Balance Shaft Assembly Gear Cover Bolt/Stud

105 in-lbs

Balance Shaft Assembly Sprocket Bolt -

250 in-lbs

Balance Shaft Assembly Tensioner Bolts -

105 in-lbs

Connecting Rod Cap Bolts

20 ft-lbs 90 Degrees

Main Bearing/Bedplate Bolts

First Bolts 11 17 20 = Hand tight

 

Then Bolts 1-10 = 30 ft-lbs 90 Degrees

 

Then Bolts 11-20 = 20 ft-lbs