To much compression and coolant overflowing
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From: Hopkinsville, KY, US
To much compression and coolant overflowing
I have a 1993 honda civic hatch and the radiator seems like its getting to much pressure and overflowing into the fill bottle. I have to put coolant in the radiator every 4-6 days or it will overheat. The radiator forces the coolant to the top and fills up the bottle. The car still runs and drives great but this really getting on my nerves and would like some help. I have replaced the radiator cap and my oil is normal color-black. What else could this be?
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From: San Jose, CA, USA
Re: To much compression and coolant overflowing (ExVtec)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ExVtec »</TD></TR><TR><TD CLASS="quote">Headgasket perhaps.
Do a comp check on the motor.
</TD></TR></TABLE>
I would have to agree with this statement, since it's the only explanation I can think of for a pressure increase in the system if you already ruled out the radiator cap. An easy way to check for a bad thermostat is to feel your upper and lower radiator hose as the engine is warming up. The upper hose should get hot first, and the lower hose should stay pretty cool until the thermostat starts to open, at which point it will begin to warm up and eventually be the same temperature as the upper hose. That said, I don't see how a stuck thermostat could increase pressure in the system, but it's easy to check, so you might as well cover all your bases. In addition to a compression test, you might want to also rebleed your cooling system, and watch for bubbles coming up through the radiator fill neck while idling/warming up(after you've bled the system), since this is also a telltale sign of a blown head gasket, as are low/inconsistent compression numbers(obviously) and noticeable amounts of air gurgling into the reservoir.
Do a comp check on the motor.
</TD></TR></TABLE>
I would have to agree with this statement, since it's the only explanation I can think of for a pressure increase in the system if you already ruled out the radiator cap. An easy way to check for a bad thermostat is to feel your upper and lower radiator hose as the engine is warming up. The upper hose should get hot first, and the lower hose should stay pretty cool until the thermostat starts to open, at which point it will begin to warm up and eventually be the same temperature as the upper hose. That said, I don't see how a stuck thermostat could increase pressure in the system, but it's easy to check, so you might as well cover all your bases. In addition to a compression test, you might want to also rebleed your cooling system, and watch for bubbles coming up through the radiator fill neck while idling/warming up(after you've bled the system), since this is also a telltale sign of a blown head gasket, as are low/inconsistent compression numbers(obviously) and noticeable amounts of air gurgling into the reservoir.
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Joined: Jul 2008
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From: Hopkinsville, KY, US
Re: To much compression and coolant overflowing (inspyral)
The top radiator hose does get hot first so i dont think it could be a thermostat. Im prolly just gonna replace the head gasket and see what happens.
Modified by civicboy2307 at 5:17 PM 7/21/2008
Modified by civicboy2307 at 5:17 PM 7/21/2008
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From: Little Mexico, NC, USA
Re: To much compression and coolant overflowing (civicboy2307)
I would do the head gasket and the thermostat.....If it has gotten hot enought the thermostat's seal can distort ans cause it to stick....We always do a thermostat with a head gasket replacement, the parts are cheap enough, why not....
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