Question about 1994 Honda Civic

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1994 Honda Civic pushes coolant from radiator into overflow reservoir, then out overflow tube. Fairly new radiator and cap has been replaced twice since this began. Sometimes pulls coolant back into radiator when cools, sometimes not. Fans seem to work, at least on max A/C.

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Posted on Sep 26, 2009


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Air in lines for cooling system of 95 nissan maxima

Hello Michelle, my name is Michael and I too had air in the cooling system and this is how I got it out. I had to raise the front end to where the middle of the front bumper was about 40 inches. I removed the radiator cap and immediately had ton add more coolant till it was visibly full at the radiator filler neck. Make sure the cap on the overflow reservoir is on tight. Now start the car and observe the filler neck because you will probably have to add more coolant. once it is full turn on the heater to the max position and direct it to the feet and econ. you should see a lot of bubbles coming from the radiator filler neck. That is the air being purged from the system. make sure you fill with coolant as needed. Now when the t-stat opens you'll see the coolant drop from the filler neck because it's being exchanged from the engine block do not add coolant at this point. Put the radiator cap back on and remove the screw holding the overflow reservoir and raise the reservoir above the radiator and squeeze the tube to get the air out of the tube. Once the air is out and the tube is filled with coolant put the reservoir back in place and fill with coolant to the FULL mark. Shut off the engine lower vehicle and let the engine cool down and remove the radiator cap and fill with coolant till it is visibly full and replace the radiator cap. I had to do this twice but it worked and my car is operating at normal temperature and with the same stroke took care of a few other problems. Hope this helps and good luck to you.

Mar 29, 2013 | 1995 Nissan Maxima

1 Answer

Not pulling coolant into radiator

I assume you mean that it is not pulling coolant from the overflow back into the radiator when it cools down? This will either be a blocked overflow tube, or a malfunctioning radiator cap. Pull out the overflow tube and blow through it to clean it. Replace the radiator cap.

Nov 29, 2011 | 1997 Honda Civic

2 Answers

My overflow reservoir fills, and will not go back into the radiator. Why?

Check the radiator cap seal.
If the radiator cap is not sealed the vacuum pressure that suppose to s_uck back the coolant from reservoir will not work.
Better buy/replace that radiator cap with original specs.

Hope that helps!

Nov 28, 2011 | 1991 Honda Civic

1 Answer

My cooloant reservoir overflows when hot but i have replaced my termostat twice what can be the problem 99 year model

replace the radiator cap and or the hose to the coolant reservoir. If there is a leak in the coolant tank to radiator hose then vacuum can not be created to draw the coolant back into the engine as it cools. A cracked, pinched or loose hose would be suspect. Or your radiator cap is not allowing the coolant to flow back into the engine; there is a small valve in the radiator cap for this purpose. This is assuming the engine is otherwise operating correctly; ie no blown head gasket.

Jun 17, 2011 | Ford Taurus Cars & Trucks

1 Answer

Is a compression test a conclusive way to check for a leaking head gasket? My 99 honda civic (D16Y7) Is losing coolant and ruining radiator caps from the coolant obviously getting too hot. I did a...

Check for milky oil
It may help to have the radiator cleaned and flushed, and a new thermostat installed, the coolant may be going out the overflow
Not certain how it ruins radiator caps, they hold about 5psi in the radiatior and let excess pressure into the overflow, then when the engine cools, allow coolant to s uck back form the overflow tank

May 27, 2011 | 1999 Honda Civic

1 Answer

My 1998 Honda Civic EX 2 Dr coupe constantly overheats. We have tried boring out the thermostat, and replaced the radiator cap which helped somewhat. It keeps blowing the lid off of the overflow resevoir...

Cracked Cylinder head or cylinder head gasket blown. Bet you filled it up with cold water when it was hot! Check your oil level, see if it is going up (water getting in) Remove the rad cap start your engine and if it blows the water out then i'm probably right.

Feb 02, 2011 | 1998 Honda Civic

2 Answers

Pushing anti-freeze out the resevoir. Changed water pump, thermostat. Temp. gauge does not indicate overheating. Fans seem to be working OK.

Try replacing the radiator cap. A weak cap will allow coolant to leave the radiator and go thru the overflow tube to the reservoir.

Feb 01, 2011 | 2000 Hyundai Elantra

1 Answer

Sometimes car will get hot. radiator will b dry. other times its fine

Check ur radiator cap! Mostly when the engines become hot, coolant goes thru the coolant reservoir and comes back to the radiator when it cools down. Damage radiator caplet the coolant goes thru the reservoir but can't siphon back the coolant to radiator , thus always overflows the reservoir and the radiator dries out from its coolant! Check also if there is LEAKS in the bypass hoses and CAP PLUGS! Hope that might help u out!

Nov 16, 2010 | 1998 Honda Civic

2 Answers

03 Honda Civic heater blows cold air. Only heats up when accelerating.

Have the same problem since last spring. Kept going low on coolant and the coolant reservoir level would go up. Tried new radiator cap, did not help. Now blowing coolant out of reservoir, head gasket is bad.

Dec 29, 2009 | 2003 Honda Civic

1 Answer

Have new radiator, water pump hoses, belts; system has been bled; experimented with bypassing the heater core; thermostat still overheats. Also, coolant goes to the overflow bottle, but often...

The reservoir,and,or,the tubing from the radiator,to the reservoir may have a pin hole in it,or the tubing is sucking together.Replace the tubing,and the radiator cap,and the reservoir top.See if it will work correctly.Fill reservoir,and radiator,and let it run until the cooling fans cut on,then cut the engine off.Wait about 25 minutes,and see if the reservoir will drop in level,if so,repeat this process until the vehicles cooling system is normal.Make sure the cooling fans are coming on,and going off,with the ac off.If the cooling fans are coming on,then that is good,but,they must go off by them selves,or the cooling system is not cooling down.

Nov 24, 2009 | 1997 Isuzu Rodeo

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