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Wrangler YJ Engine Torque Specs
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 |