How to Replace Valve Cover Gasket 05-10 Chrysler 300

Difficulty: Advanced · About 180 min · Chrysler 300

Replace the valve cover gaskets on a 2005–10 Chrysler 300, removing the upper intake for access and renewing the ignition coil seals during assembly.

Steps

1. Remove the upper intake manifold

   Disconnect the intake tube, vacuum lines, sensors, and harness clips. Remove the throttle body and manifold fasteners, then lift the intake manifold clear without dropping debris into the ports.

2. Remove both valve covers

   Disconnect injector and ignition wiring, coil packs, grounds, and breather hoses. Remove the cover fasteners and lift each cover away, using a plastic tool if the gasket sticks.

3. Clean the covers and replace seals

   Remove the old perimeter gaskets and coil seals. Clean the gasket channels and sealing surfaces, then seat the new gaskets and seals evenly without stretching them.

4. Reinstall the valve covers

   Clean the cylinder-head sealing surfaces and set the covers in place. Start all bolts by hand and tighten evenly to the vehicle's specification, then reconnect grounds, coils, and wiring.

5. Reinstall the intake manifold

   Replace the intake and EGR seals, then position the manifold. Tighten its fasteners in the prescribed sequence and reconnect vacuum lines, sensors, harnesses, and the intake tube.

6. Start and inspect the engine

   Start the engine and listen for vacuum leaks. Inspect around both covers for oil seepage and confirm the idle is steady and all electrical connectors are secure.

Check your vehicle’s repair manual for exact specifications and fit.