Torque values and specifications on this page are provided as a reference. Confirm any figure against the factory service manual for your specific model year and configuration before relying on it. Corrections welcome via our contact page.
Applies to
2012–2018 Jeep Wrangler JK and JKU with the 3.6L Pentastar V6. This page does not apply to 2007–2011 3.8L models.
Source status: The torque figures below come from a Jeep service-manual reprint that OffroadMe has not verified against a first-party factory publication. Treat them as reference values and confirm them against factory service information for the exact model year before tightening fasteners. Read the OffroadMe editorial standards for the source hierarchy.
89 INCH-lbs (10 N·m)
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, follow the correct tightening sequence and use an inch-pound torque wrench to prevent vacuum leaks or cracking.
Required Tools
- 🔧 8mm Socket (Upper)
- 🔧 10mm Socket (Brackets)
- 🔧 8mm Deep Socket (Lower)
- 📏 1/4-inch Drive Torque Wrench (INCH-Lbs)
Torque Specifications — Reference
| Component | Torque Spec (INCH-lbs) | Socket Size |
|---|---|---|
| Upper Intake Manifold Bolts (7) | 89 INCH-lbs (10 N·m) | 8mm |
| Support Bracket Nuts & Studs | 89 INCH-lbs (10 N·m) | 10mm |
| Lower Intake Manifold Bolts (8) *Required if doing Oil Cooler replacement |
106 INCH-lbs (12 N·m) | 8mm |
⚠️ 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:
Source note: these values are reproduced from a Jeep service manual reprint rather than from a first-party factory publication verified by us. They are consistent with what workshops commonly use, but treat them as a reference and confirm against the factory service manual for your exact model year before relying on a figure.