How to Replace Overflow Bottle 06-10 Chrysler 300

Difficulty: Intermediate · About 45 min · Chrysler 300

Replace a Chrysler 300 coolant reservoir, reconnecting both hoses securely and bleeding the cooling system until cabin heat is steady.

Steps

1. Drain coolant safely

   Let the engine cool completely, raise and support the vehicle if needed, and place a drain pan beneath the radiator. Open the drain valve and collect coolant, then close it securely.

2. Remove the reservoir

   Move the power steering reservoir aside without disconnecting its lines. Release both coolant hose clamps, remove the reservoir bolts, and lift the bottle out.

3. Install the new reservoir

   Connect the lower hose and position its clamp, then set the reservoir in place. Reconnect the upper hose and install the mounting bolts.

4. Refill and bleed the cooling system

   Fill with the coolant type specified for the vehicle. With the cap off and heater set warm, run the engine while monitoring temperature and coolant level; top up as air purges, then cap only when stable.

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