Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP2009COMMANDER 4WD V6-3.7LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER HEAD ASSEMBLY
2009 Jeep Commander 4WD V6-3.7L
Cylinder Head Assembly
2009 Jeep Commander 4WD V6-3.7LSECTION Cylinder Head Assembly
Cylinder Head Torque
Step 1: Tighten bolts 1-8 27 Nm (20 ft. lbs.).
Step 2: Verify that bolts 1-8 all reached 27 Nm (20 ft. lbs.), by repeating step 1 without loosening the bolts. Tighten bolts 9 thru 12 to 14 Nm (10 ft. lbs.).
Step 3: Tighten bolts 1-8 90 °.
Step 4: Tighten bolts 1-8 90 °, again. Tighten bolts 9-12, 26 Nm (19 ft. lbs.)
Head Bolt Reuse/Replace
The cylinder head bolts are tightened using a torque plus angle procedure. The bolts must be examined BEFORE reuse. If the threads are necked down the bolts should be replaced.
Surface Variation - Warpage
Cylinder Head Warpage (Flatness) 0.0508 mm (0.002 in.)
Intake Manifold
Intake Manifold Bolts 12 Nm (105 in.lbs.)
Camshaft Bearing Cap
Camshaft Bearing Cap Bolts 11 Nm (100 in.lbs.)
Exhaust Manifold
Exhaust Manifold Bolts 25 Nm (18 ft.lbs.)
Start at the center arm and working outward.
Step 1: Tighten bolts 1-8 27 Nm (20 ft. lbs.).
Step 2: Verify that bolts 1-8 all reached 27 Nm (20 ft. lbs.), by repeating step 1 without loosening the bolts. Tighten bolts 9 thru 12 to 14 Nm (10 ft. lbs.).
Step 3: Tighten bolts 1-8 90 °.
Step 4: Tighten bolts 1-8 90 °, again. Tighten bolts 9-12, 26 Nm (19 ft. lbs.)
Head Bolt Reuse/Replace
The cylinder head bolts are tightened using a torque plus angle procedure. The bolts must be examined BEFORE reuse. If the threads are necked down the bolts should be replaced.
Surface Variation - Warpage
Cylinder Head Warpage (Flatness) 0.0508 mm (0.002 in.)
Intake Manifold
Intake Manifold Bolts 12 Nm (105 in.lbs.)
Camshaft Bearing Cap
Camshaft Bearing Cap Bolts 11 Nm (100 in.lbs.)
Exhaust Manifold
Exhaust Manifold Bolts 25 Nm (18 ft.lbs.)
Start at the center arm and working outward.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.