89 INCH-lbs (10 Nยทm)
Whether you are replacing spark plugs or tackling the infamous oil filter housing leak, removing the upper intake manifold (plenum) on the Jeep Wrangler JK 3.6L Pentastar is unavoidable. Because the manifold is made of composite plastic, strict adherence to the factory torque sequence is mandatory to prevent vacuum leaks or cracking.
Required Tools
- ๐ง 8mm Socket (Upper)
- ๐ง 10mm Socket (Brackets)
- ๐ง 8mm Deep Socket (Lower)
- ๐ 1/4-inch Drive Torque Wrench (INCH-Lbs)
FSM Factory Torque Specifications
| Component | Torque Spec (INCH-lbs) | Socket Size |
|---|---|---|
| Upper Intake Manifold Bolts (7) | 89 INCH-lbs (10 Nยทm) | 8mm |
| Support Bracket Nuts & Studs | 89 INCH-lbs (10 Nยทm) | 10mm |
| Lower Intake Manifold Bolts (8) *Required if doing Oil Cooler replacement |
106 INCH-lbs (12 Nยทm) | 8mm |
โ ๏ธ Critical Installation Warnings
The specs are in INCH-pounds. If you accidentally set a standard 1/2″ drive torque wrench to 89 foot-pounds, you will instantly snap the bolts in the cylinder head and destroy the plastic manifold. Always use a dedicated 1/4″ drive inch-pound wrench.
The Tightening Sequence
Do not tighten one side down completely. Always hand-thread all bolts first to ensure the gaskets are seated properly. Then, tighten in a criss-cross “star” pattern starting from the center and working your way out to the edges.
*Repeat the sequence twice to ensure all bolts are seated at exactly 89 in-lbs, as outer bolts can loosen inner bolts during compression.
Related Engine Data
Going deeper into the Pentastar? Reference our other critical specifications: