what up honda-tech. so i just replaced piston rings, head gasket etc and when i went to test drive it, everything was fine. but when i parked it, water was overflowing and boiling from the radiator reservoir. Im pretty sure its my thermostat, but some input would be appreciated. thanks.

*my upper radiator hose is hot and my lower is cold

 

Thermostat for sure.

 

Mines doing the same thing, I was told its probably the thermostat. Is your Fan engaging?

 

thermostat.

 

 

also make sure the system is bled properly. an air pocket could cause the thermostat not to open.

 

x2 had this problem

Do this first, if it doesn't work then change thermostat.

 

You should also bleed it from the bleader on the upper rad hose close to the head.

Apparently its more affective that running your car with the rad cap off letting it bubble out.

 

Bump, did you find the issue man?

 

^^it was the thermostat lol. i knew it was the thermostat just from the symptoms. i took a look at the car personally. he changed it and its fine now. thanks guys.