Rad Flush - antifreeze question
Winter is coming and don't ask but I am in the midst of a thorough radiator flush and hose replacement. The chemical cleaner I am using suggests driving the for 3-6 hours over a few days to allow the ...
Forum Discussion
Yes it will overflow as the air bubble expands due to rise in temperature.
All you can do is attempt to catch the overflow. When the thermostat opens the radiator will seem to go empty. Keep topping off for 5 to 10 additional minutes.
I assume you have a coolant recovery bottle. This will chase any remaining air out of the system during the first few heating and cooling cycles.
I have always thought about drilling a 1/16" or 1/8" hole in the flange but have never tried it. Can't see that it would hurt much. Could go down and ask for a premium thermostat and see if it has the release hole. Or possibly remove the thermostat during the initial fill to that level. Still need to observe the thermostat open and verify the level before you roll.
No idea why it shut off.
Did you have the old thermostat in during chem clean? Probably had the release valve. Dig it out of the trash and inspect.
All you can do is attempt to catch the overflow. When the thermostat opens the radiator will seem to go empty. Keep topping off for 5 to 10 additional minutes.
I assume you have a coolant recovery bottle. This will chase any remaining air out of the system during the first few heating and cooling cycles.
I have always thought about drilling a 1/16" or 1/8" hole in the flange but have never tried it. Can't see that it would hurt much. Could go down and ask for a premium thermostat and see if it has the release hole. Or possibly remove the thermostat during the initial fill to that level. Still need to observe the thermostat open and verify the level before you roll.
No idea why it shut off.
Did you have the old thermostat in during chem clean? Probably had the release valve. Dig it out of the trash and inspect.
