Bleed the Cooling System

7:02

11:29

76.3K views

At 7:02 in

LBZ Duramax Thermostat Replacement (Quickest Way)

Watch on YouTube

What happens here

Pour new coolant into the reservoir. Keep the bleeder screw (the front bolt on the thermostat housing) slightly loosened. This allows air trapped in the cooling system to escape as the new coolant fills the engine passages. Continue pouring coolant until it starts to seep or pour out of the bleeder screw. Once a steady stream of coolant, free of air bubbles, comes out, tighten the bleeder screw securely.

Goal: Remove air from the cooling system

Tools and materials

13mm Socket/Wrench — Tightening the bleeder screw
Coolant — Refilling the cooling system

What they say

(725 characters)

Hide

correctly so I got the two front and back ones bolted on because the other two go on just bracket put those on so I can still get to the bleeder poured some coolant in there until it started pouring out of here and then while it was pouring out and just kind of put the put the bolts in I'm gonna put put the rest of the bracket on fire it up let it get warm and it may take more coolant we'll see I guess it would be a process of letting it run that'll say low coolant if it is low put more in and then it just kind of I don't know this what I read we'll see maybe won't anything at all I mean not that much came out and I didn't have to pour very much in to make it rebleed out of there so give it a shot so in this bracket

Auto-generated from the video audio.