Refill Coolant and Initial Bleeding
13:36
23:42
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At 13:36 in
Fixing P0128 on My 2017 Jeep Wrangler — EASY Thermostat Replacement!
What happens here
After the thermostat is installed, reattach the rubber coolant hose to the thermostat housing and secure it with the hose clamp. Then, carefully pour the correct OAT (Organic Acid Technology) coolant into the radiator through the filler neck, using a funnel to prevent spills. While filling, ensure the bleeder screw on the thermostat housing is slightly open to allow air to escape from the system. Fill until coolant starts to drip from the bleeder screw, then close the bleeder screw. Close the radiator cap and the coolant reservoir cap once filling is complete.
Goal: Replenish the engine coolant and perform an initial air bleed.
Tools and materials
- Funnel — Pouring coolant into the radiator
- Hose Clamp Pliers Icon — Securing the coolant hose
- Quarter-inch wrench — Opening and closing the bleeder screw
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