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Old 31 Dec 2012, 10:17 pm
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Default i had a radiator replaced on my 2007 honda fit sport and it still overheats, I wont have heat just

cool air th? I wont have heat just cool air then it overheats within minutes, I check fluid levels they are ok but usually need refilled at least one time a week, after steady driving for a few minutes without stop and go the heat will kick in and the car no longer overheats but if i sit and idle for more than a few minutes no heat and eventually overheats again

as far as the head gasket being blowed, I haven't noticed any white smoke coming from exhaust. And yes thermostat was replaced, got some tips from other people I'm gonna check as soon as this weather clears until then I'm gonna try not too drive it.

Thank you all for your helpful tips. Two years ago I had to have the radiator replaced due to an accident, then last year took it to Honda dealer and they said oh u dont need a thermostat u need a radiator I agreed but when i went to shop and asked to see old one they already got rid of it?? go figure no I dont trust the dealer at all ,I have looked at top of radiator there is no evidence of oil in water at all yesterday i started my car and i'm wrong I sat for like 15min - 20min i had heat then drove for a bit still had heat but almost back home i felt heat go cold and within seconds it overheated left it cool down and no coolant needed replaced, I know it needs to go to garage its just getting money to do so
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Old 31 Dec 2012, 10:32 pm
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It's been overheated to much and unfortunately you may have blown the head gasket or damaged the engine.. Be careful not to drive it if it's overheated. Take it to your Honda dealer to have it correctly diagnosed..
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Old 31 Dec 2012, 10:50 pm
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if your heater is not working it may be a leak in the heater core which would also explain the fact that you have to refill the coolant. but that could also be vapor loss from over heating as well. have you replaced the thermostat yet? usually the first place to start. might be an easy fix
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Old 31 Dec 2012, 11:10 pm
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You will have to have a CO2 Test performed in order to find out if it in fact does have a blown head gasket.

NOTE: The dealer is the last place to take it, Most dealerships couldn't diagnose a flat tire because of poorly trained technicians!
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Old 31 Dec 2012, 11:23 pm
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The first thing to do is make sure the radiator is full. Not the reservoir but the radiator itself. If the radiator is full then it does sound like a bad head gasket. (If the thermostat was bad the heater would still work and a bad heater core wouldn't cause overheating.)
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Old 31 Dec 2012, 11:32 pm
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OK, then if everything new is ok, what happened to the old radiator? What caused it to quit? Did you have it purged at the radiator shop? Did they do the work? Did you find any puddles on the garage floor? Don't look for white smoke, look for steam, A compression check will tell you if you have a blown head. It doesn't take much. Sometimes you can drive hundreds of miles, then some days you go 10 feet, one day it will quit, then you will be stuck. The coolant is going somewhere, look for oil floating at the top of the radiator or water in the oil when you dump it. Good luck.
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