Right. Start with a cold unstarted engine (best early in morning when it have stayed cold overnight), remove radiator cap and return bottle cap, fill radiator until it overflows (if coolant level have dropped and you can see inner radiator fins) fill radiator return bottle until it overflows.
Start engine, let it runs for 5-10 minutes on idle and turn on your heater to MAXIMUM HEATand air blower to MAXIMUM LEVEL (DO NOT REV ENGINE, LET IT IDLE), until you can see coolant level either overflows followed by bubbles and/or coolant level drops where you can see radiator inner fins, as soon as this happened, keep filling radiator until it overflows again.
NOTICE, overflowing coolant will be very hot so be careful not to get hot liquid burned.
Let the engine idle for another 5-10 minutes and keeping heater ON full blast after you can see overflows are not followed by anymore bubbles, turn off ignition, put radiator cap and overflow bottle cap on tightly.
Use car, as you would do normally or drive for about 55 miles or 100km , after 55 miles, stop car, check overflow bottle, see if coolant amount dropped below minimum bottle mark, if YES, just refill coolant until it overflows.
From here you can use car as normal but keep a close watch on catch bottle for the next 2-3 days until coolant level settles down to between MINIMUM and MAXIMUM level.
If coolant bottle is empty after the drive, stop engine, let engine cool off for at least 30 minutes before opening radiator cap. Once you can open radiator cap, fill radiator again and do same as above process.
WARNING NOTE, if this happened, you must take your car to a garage for a closer inspection as there may be other unknown problem(s).
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If you dont have an external coolant leak anywhere under your hood that has shown up on your driveway it could be the intake manifold or the headgasket leaking. Also check the thermostate to solve the heat issue.
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yes, air pockets will stop the heater, but you have to solve the problem that's creating the air pockets or you will never get the heat working right. If there are no visible leaks in the system, you may have a blown head gasket allowing coolant to pass out the tailpipe.
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