is it normal when i take off the radiator cap ...?
Coolant slowly pushes up n starts to overflow, engine ON n warm. Is that normal ?
- 4 weeks ago
Yes, When you released the radiator pressure cap you should have heard a pressure release as well as hot coolant.
From now on always allow the engine to thoroughly cool before unscrewing a radiator pressure cap. Nowadays, always check the coolant level by checking the coolant level in the plastic coolant recovery reservoir when the engine is stone cold. It should be at least half full.
- zipperLv 64 weeks ago
If your tank is full to start with: Hell Yes!
- PoppyLv 71 month ago
Today’s cars are not meant to be opened at the radiator, there is an overflow jug. Use it instead.
- Trump 2020Lv 71 month ago
yes it's normal. When the cap is on, the coolant is pressurized, and that keeps it from boiling. (Under normal conditions)
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- L.N.Lv 71 month ago
Yes, if the cap was on it would go into the reservoir tank as it got hot and draw it back out as it got cold.
- thebax2006Lv 71 month ago
You're supposed to let the motor cool before taking the radiator cap off. If the motor is at operating temperature and running you'll have some coolant come out from the 16 pounds of pressure in the system.
Run the motor for a good 15 minutes with the radiator cap off and watch for air bubbles coming out of the radiator neck. When the bubbles stop the system should be purged of air.
If the coolant shoots out of the radiator non stop you have a bad head gasket.Source(s): Mitsubishi Master Tech
- regeruggedLv 71 month ago
Don't take the radiator cap off. The cooling system is under pressure. Check the level by looking at the overflow tank.
- FØXY ÐïLv 41 month ago
Yes, the coolant is under pressure so only remove the cap when the engine is cold to avoid scalding.
- 1 month ago
Yes. Warm water/coolant expands.
- 1 month ago
Yes it s loud and useless