Hi guys just hoping for some help regarding my radiator on my new 2008 outlander DI D. Had a coolant leak and used radweld. Seemed to do job but now Have cold air going out of car heaters. I believe this is air in cooling system as I have had issues before on other cars. But bleed plug is nowhere to be found.

 

That the filler cap is the highest point in the system. If you have air bubbles in your heater core, you can bleed them out by turning on the heater full blast while letting the engine idle and topping off from the cap


This is from the Service Manual:

"By referring to the section on coolant, select an appropriate
concentration for safe operating temperature within the range
of 30 to 60 %. Use special tool MB991871 to refill the coolant.
A convenient mixture is a 50 % water and 50 % antifreeze
solution [freezing point: -31°C (-24 °F)].
Recommended antifreeze: Long Life Antifreeze
Coolant or an equivalent
Quantity:
9.5 dm3(10.0 quarts)
10.0 dm3(10.6 quarts) <Vehicles with Towing
Package or DOR radiator>
9.Reinstall the radiator cap.
10.Start the engine and let it warm up until the thermostat opens.
11.After repeatedly revving the engine up to 3,000 r/min several
times, stop the engine.
12.Remove the radiator cap after the engine has cooled, and
pour in coolant up to the brim. Reinstall the cap."