2003 civic over heating.

[hellrider]

need help my civic is over heating at times , when i drive long trips. i have all ready replaced the water pump and put a new fan switch in it.( note: i am not loseing any coolant) i need help to fine out what else could cause this oveer heating problem.

[-EnVus-]

Air in the system needs to be purged properly also make sure the fans are even turning on

[1civic]

Best to heat cycle car in driveway with cap off to confirm the thermostat opens, no air in system, fans works, and water pump circulates...

I heat cycle cars 2x before re-installing cap, and then test driving, that's just my :2cents:

[hellrider]

i bleed the coolant system twice. but thanks