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.
2012 Chrysler 300 AWD V6-3.6LFACTORY OEM SERVICE PROCEDURE
Intake Manifold
INTAKE MANIFOLD
UPPER
Prior to installing the upper intake manifold, verify that the four fuel rail bolts were not inadvertently loosened.
The bolts must tightened 7 Nm (62 in. lbs.)
Install the seven upper intake manifold attaching bolts
Tighten the bolts 8 Nm (71 in. lbs.).
Install two nuts to the upper intake manifold support bracket.
Tighten the nuts 10 Nm (89 in. lbs.) and
Tighten the stud 20 Nm (15 ft. lbs.)
INTAKE MANIFOLD
LOWER
Install the fuel injectors and the fuel rail to the lower intake manifold.
Tighten the four bolts 7 Nm (62 in. lbs.)
Install the intake manifold retaining bolts
Tighten 8 Nm (71 in. lbs.).
Factory Service Tools
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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.