overheating after bleeding coolant system

If you lost heat, either you are low on coolant or there is an air pocket. However, if the heat was working, there shouldn't be air in the system.

Here are the directions for refilling the system. Take a look at them and let me know if this is how you did it.

____________________



Pic 1


10. Pour Honda All Season Antifreeze/Coolant Type 2 into the radiator up to the base of the filler neck.

NOTE:
- Always use Honda All Season Antifreeze/Coolant Type 2. Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail.
- Honda All Season Antifreeze/Coolant Type 2 is a mixture of 50% antifreeze and 50% water. Premixing is not required.

Engine Coolant Refill Capacity (including the reservoir capacity of 0.4 L (0.4 US qt):
M/T: 4.0 L (4.2 US qt.)
A/T, CVT: 3.9 L (4.1 US qt.)
11. Install the radiator cap loosely.
12. Install the battery.
13. Start the engine and let it run until it warms up (the radiator fan comes on at least twice).
14. Turn off the engine. Check the level in the radiator, and add Honda All Season Antifreeze/Coolant Type 2 if needed.
15. Put the radiator cap on tightly, then run the engine again and check for leaks.

__________________________________

Note, if you feel confident that you had all the air out, there could be a head gasket issue allowing compressed air to enter the cooling system Take a look through this link:

https://www.2carpros.com/articles/head-gasket-blown-test

Let me know if anything in the aforementioned link seems to mirror what you are experiencing.

Take care,
Joe

See the thing is, the previous owner replaced the head gasket and i’m not seeing any signs of a blown head gasket. no bubbles, no milky oil, nothing.

Are you certain there are no leaks? Have you noticed any white smoke from the exhaust? Were the heater core hoses getting hot when the engine was at operating temperature, running, and the heater on?

Do me a favor. With the engine cool, loosen the return hose from the heater core and start the engine. See if air comes out. Make sure the heater is on high when you do it.

Let me know what you find.

Joe

i will definitely do that. i have not seen any smoke from the exhaust except condensation. the temperature fluctuates almost like a thermostat issue. i’ve heard Honda’s are very picky about thermostats, especially if they’re $7.00 from advance auto. but see i’ve already replaced that, tightened the bolts down, and put gasket seal on there so i know there’s not air going in from there. so that means there’s air getting into the system somehow and i know there’s not a leak anywhere because i’m not seeing traces of coolant anywhere. and i’m not losing power like you would a blown head gasket, and i’ve done a pressure test and had an air leak on the inlet hose on the radiator but that’s been long fixed.

Try to see if you get coolant or air. In all honesty, if you would rather not take it apart, start the engine, turn the heater on, and then allow it to warm up. Both heater hoses should get hot. If only one does, then either we have a blocked heater core or there is air in it.

Please don't loosen that hose while the engine is hot. I realize you likely already know that, but I wouldn't have been able to sleep tonight questioning it. LOL

Take care,
Joe

you got it. i’m going to go for a drive tonight anyways and i’ll get out and feel them as i get there. i will let you know what i find.