Scotty
i replaced the radiator on my truck which has 250500 on it. My problem is I can’t get it to burp all of the air out creating a no heat problem. I’ve called around and no one wants to touch it they said they didn’t do the work
what ever I’m not a novice at working on cars and trucks I’m mean I dropped the dash on this two years ago and replaced the heater core and didn’t experience this problem.
so any ideas would be greatly appreciated.
I’ve been following for years.
Park on an incline facing upwards so that the radiator of the truck is higher than the heater core. Add coolant to the radiator with the truck running, and it should burp the heater core. You can also fill the radiator and reservoir to their proper level and drive it around, or revv it in place. Higher RPMs will force coolant into the heater core and it will "get stuck" in the heater core until enough coolant gets in that it moves the air bubble to the radiator. The level will drop in the radiator as it does, then won't drop anymore and this means it's bled. Check the radiator after it cools down and top it off until the level doesn't drop anymore.
It will not burp the air out of the heater core if the setting is not on "high".
Park it facing up hill or jack up the front end as high as you can. Turn the heat setting on High, start it, and when the thermostat opens, if there is air in the system, you'll see bubbles in the radiator neck (cap off). When the bubbles stop and the level drops, fill it up, put the cap on and top up the reservoir tank. You could also get a special burping funnel online or at auto parts stores to accomplish the task. Keep an eye on the reservoir for a couple of days and fill to the "full" line when the vehicle is warmed up.
