Question about 1995 Honda Civic

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Honda Civic LX 1995, replaced radiator, new radiator cap and removed thermostat, still getting boiling coolant to recovery tank above max mark level, then car starts overheating. when the car is cool the coolant in the recovery tank gets sucket all back to radiator, each time I have to add collant to min level. what do you think the problem is.

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First check for the rad fan working. It could be the Fan relay, bad ground connection or coolant temp sensor (commands the fan relay). If not, check for little tiny bubbles in the coolant. Do this by running the vehicle with the rad cap off. Make sure there is no pressure in the cooling system first or you will get burned (squeeze rad hose, should be cool and easy to squeeze). Look into the top of the rad and watch for these tiny little bubbles. If they are present, you will need a head gasket.

Posted on Jul 22, 2008

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The car was overheating i checked all hoses and replaced the thermostat the radiator it still is ovrheating and the water is boiling in the overflow tank


Answer could be a faulty thermostat,or it could be a sign that your head gasket is about to blow ,or last of all your timing could be out of sync.

Answer 2 from Inventus: It means your cooling system is funtioning properly. In a system having a coolant recovery tank, coolant in the radiator is always up to the brim, hot or cold. There is negligible or no air space. When coolant in the radiator expands sufficiently due to warming from the engine, it will squeeze past the pressure cap's bottom seal and flow into the recovery tank. (If no provision for such expansion was present, the expansion would rupture the radiator or your hoses.) Only coolant within the radiator is under pressure, and because of this pressure (together with the elevated boiling point that the "anti-freeze" permits), it normally does not boil. But once past the pressure cap's bottom seal, the overflow is at atmospheric pressure and therefore boils.
This boiling is usually unnoticed after a short, i.e., local, trip because the cooler coolant already in the recovery tank quenches it. But after some highway driving the influx of more hot overflow heats up all the coolant in the recovery tank to the (unpressurized, i.e., "natural") boiling point.
As the engine cools when shut off, the contracting coolant in the radiator sucks back coolant from the recovery tank. Fluid in the recovery tank should never be below the "full hot" or "full cold" marks, lest air be sucked in.
-- BETTER ANSWER ==
Your cooling fans are not turning on. It is not normal for your overflow tank to boil like that. It is true that your radiator is overflowing into the reserve tank, but that means yourr adiaotor is boiling. Check for blown fuses or relays for your cooling fans. IF theya re fine. run your engine for about 15 minutes and drive. When you temp level is at normal operating temp open your hood with the engine runing and see if your fans are on. If they are, then you may have a bad thermostat or a plugged radiator, or a bad water pump. If the fans are not on, get your cooling fan switch replaced if your car has one. Check your temp sending sensor

Oct 30, 2011 | Cars & Trucks

1 Answer

Does the 1997 honda civic have an air lock preventor Every morning I have to throw the built up coolant back into the radiator from the auxiliary container. When I open the radiator, the air belches...


The only thing I can think of that would cause this is if the antifreeze is old or weak or diluted down with too much water. Try the following:prev.gif next.gif DRAIN & REFILL Fig. 1: Remove and drain the reservoir recovery tank 91161p06.gif
Fig. 2: Location of the radiator draincock 91163p27.gif
Fig. 3: Use your hand to unscrew the plastic draincock 91163p28.gif
Fig. 4: To refill the recovery tank, twist the cap . . . 91161p09.gif
Fig. 5: . . . then pull up to remove it from the tank 91161p10.gif
Fig. 6: Adding coolant to the reservoir bottle 91161p30.gif
Fig. 7: Always check the condition of the radiator cap gasket and seal. Place a light coating of coolant on the seal and gasket when installing tccs1079.gif
CAUTION
When draining the coolant, keep in mind that small animals and domestic pets are attracted by ethylene glycol antifreeze and may attempt to drink any that is left in an uncovered container or from puddles on the ground. This can be fatal if ingested in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused until it becomes contaminated or several years old. To avoid injuries from scalding fluid and steam, DO NOT remove the radiator cap while the engine is running or if the engine or radiator is still hot.
  1. Before draining the cooling system, place the heater's temperature selector to the full WARM position while the engine is running.
  2. Turn the engine off before it gets hot and the system builds pressure.
  3. Make sure the engine is still cool and the vehicle is parked on a level surface.
  4. Remove and drain the reservoir recovery tank.
  5. Place a fluid catch pan under the radiator. Turn the radiator draincock counterclockwise to open, then allow the coolant to drain.
  6. Remove the radiator cap by performing the following:
    1. Slowly rotate the cap counterclockwise to the detent.
    2. If any residual pressure is present, WAIT until the hissing stops.
    3. After the hissing noise has ceased, press down on the cap and continue rotating it counterclockwise to remove it.
  7. Allow the coolant to drain completely from the vehicle.
  8. Close the radiator draincock. NOTE: When filling the cooling system, be careful not to spill any coolant on the drive belts or alternator. To refill:
  9. Make sure the heater temperature is placed in the full hot position.
  10. Open the bleed screw on the thermostat housing.
  11. Install the reservoir recovery tank and using a 50/50 mixture of the recommended antifreeze and clean water, fill the cooling system reservoir tank to the FULL mark. WARNING
    If any coolant is spilled on a painted surface, wipe it up immediately.
  12. Begin filling the radiator with the 50/50 mixture of coolant. Watch for air being released from the open the bleed screw on the thermostat housing. Once coolant mixture begins to steadily flow through the bleeder, close the bleeder.
  13. Continue to fill the radiator until the radiator is full.
  14. Start the engine and allow the engine to run until the cooling fans operate two times, making sure to top off the system as the fluid level drops.
  15. After the cooling fan has run for the second time, top off the system as necessary, then install the radiator cap.
  16. Allow the engine to run and inspect the cooling system for leaks.
prev.gif next.gif

Jan 25, 2011 | 1997 Honda Civic

1 Answer

How do i replace the water thmostat 99 6 cylider


WELL YOU NEED TO DRAIN COOLANT LEVEL BELOW THERMOSTAT LEVEL.YOU HAVE TO DISCONNECT MAF SENSOR LOOSEN AIRDUCT 2 LARGE CLAMPS LOOSEN REMOVE 4 SCREWS TO AIR FILTER COVER LIFT UP REMOVE COVER. THEN REMOVE AIR FILTER AND HOUSING, FIRST DISCONNECT MAF SENSOR.YOU HAVE TO DISCONNECT THROTTLE CABLE AND SHIFT CABLE.YOU HAVE TO DISCONNECT REMOVE THROTTLE BODY COOLANT HOSES DISCONNECT IDLE SPEED CONTROL VALVE CONNECTOR AND DISCONNECT TPS SENSOR CONNECTOR. THEN REMOVE THROTTLE BODY ASSEMBLY. YOU NEED TO BUY NEW THROTTLE BODY COOLANT HOSES AND NEW THROTTLE BODY GASKET FOLLOW TOP COOLANT HOSE TO ENGINE BLOCK.NOW YOU SEE CAN AND REMOVE THE THERMOSTAT HOUSING REPLACE THE THERMOSTAT.BESURE TO HAVE EXTRA COOLANT ON HAND.BLEED COOLANT SYSTEM WHEN DONE.TO BLEED COOLANT SYSTEM REMOVE RADIATOR CAP ON OVERFLOW JUG.THEN OPEN BLEED SCREW ON THE WATER PUMP BYPASS HOSE PIPE JUST A LITTLE.POUR COOLANT IN THE OVERFLOW JUG UNTIL LEVEL STOP DROPPING.STOP AT COLD MARK ON JUG.CLOSE BLEEDER SCREW ON WATER PUMP BYPASS HOSE PIPE.CRANK VECHICLE CHECK FOR LEAKS. START UP ENGINE LET IDLE FEW MINUTES THEN CHECK COOLANT LEVEL ADD MORE UNTIL UNTIL LEVEL STOP DROPPING.PUT RADIATOR CAP BACK ON OVERFLOW RESERVOIR. LET ENGINE IDLE WATCH COOLANT TEMPERATURE GAUGE.WHEN GAUGE START CLIMBING. TURN OFF ENGINE WAIT FEW MINUTES TAKE A LARGE RAG OPEN RADIATOR JUST A LITTLE YOU HEAR HISS NOISE.WHEN PRESSURE STABILIZE DONT GET SCALDED BECAREFUL.OPEN CAP LITTLE MORE.IF COOLANT PRESSURE STILL BOILS OUT WAIT 20 MINUTES ADD MORE COOLANT TO RADIATOR OVER FLOW WHEN COOLANT LEVEL STOP DROPPING.PUT RADIATOR CAP BACK ON START VECHICLE UP LET IDLE UNTIL THERMOSTAT OPEN. THEN FEEL TOP RADIATOR HOSE FEELS HOT THERMOSTAT OPEN WATCH TEMPERATURE GAUGE.IF GAUGE TEMP START CLIMBING TURN OFF ENGINE WAIT A WHILE.CHECK AND ADD MORE COOLANT.WHEN THE ENGINE CAN IDLE TEMP GAUGE STOP CLIMBING YOU HAVE BLEED COOLANT SYSTEM.KEEP CHECK ON COOLANT LEVEL.

Dec 29, 2010 | 1999 Oldsmobile Alero

1 Answer

Put a new rad in but now I can't get the air lock out of the engine


while the engine is cold, take off coolant cap. then fill the coolant tank to proper level, start car ,let it idle when thermostat opens then you will see air bubbles in tank. wait till they clear up then replace cap. you can feel to see if it is heating good, by feeling the top radiator hose. if above gives you a problem you can squeeze top hose a few times by hand with cap off. this will remove any air that is left in system. try above first. have a good one!!

Nov 14, 2010 | 1996 Honda Civic

1 Answer

I changed our my rediator and now the sensor light saying radiator coolant is low and the buzzer won't stop going off. The radiator coolant level is fine and my temp gauge is fine. Any help would be...


Do you have an overflow tank that has low level in it?
LEVEL CHECK The coolant level should be checked regularly. Serious engine damage can occur if the engine overheats. CAUTION
Check the coolant level when the engine is cold; serious injury could result from escaping steam or hot fluid if checked when hot. If your car is equipped with an electric cooling fan, make sure that the ignition switch is OFF. The cooling fan will automatically operate if the ignition switch is on and the engine coolant temperature is high, or if the wiring connector on the thermostat housing is disconnected.
  1. Depress the button on the thermal expansion tank (coolant recovery reservoir) safety cap, if there is one. Allow all of the pressure trapped in the system to escape. CAUTION
    The radiator is not factory-equipped with a safety cap. Do not remove the radiator cap before removing the expansion tank cap, or when the engine is hot. Fig. 1: Remove insects and debris from the radiator fins 85811096.gif

  2. Remove the expansion tank cap. The expansion tank should be 1⁄3 full, unless Full and Low marks are provided. The level should be well above the bottom of the tank when the engine is cold.
  3. If it is not, carefully remove the cap from the radiator. The radiator should be full.
  4. Add a 50/50 solution of ethylene glycol (or other suitable coolant) and clean water. If there was no coolant in the expansion tank, fill the radiator until the level is near the inlet port and install the radiator cap. Then, fill the expansion tank to the specified level, and secure the expansion tank cap. When checking the coolant level, the pressure cap should be examined for signs of age or deterioration. Check it for a worn or cracked gasket. If the cap doesn't seal properly, fluid will be lost and the engine will overheat. A worn cap should be replaced with a new one. The fan belt and other drive belts should be inspected and adjusted to the proper tension. (Please refer to the belt inspection and adjusting procedures, earlier in this section.) Remove the radiator cap and run the tip of your finger around the inside of the filler neck. Check for excessive deposits of rust or scale around the filler neck lip and the filler port. Make sure the coolant is free of oil. Replace the coolant as necessary. Hose clamps should be tightened, and soft or cracked hoses replaced. Damp spots, or accumulations of rust or dye near hoses, the water pump or other areas indicate possible leakage, which must be corrected before filling the system with fresh coolant. Periodically clean any debris, leaves, paper, insects, etc. from the radiator fins. Pick the large pieces off by hand. The smaller pieces can be washed away with water pressure from a hose. Carefully straighten any bent radiator fins with a pair of needle nose pliers. Be careful as the fins are very soft. Don't wiggle the fins back and forth too much. Straighten them once and try not to move them again.
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Jul 05, 2010 | 1985 Mazda RX-7

2 Answers

Honda civic 2004 changed radiator,thermostat control,changed cylinder head with machine shop, new fan...still temp rises beyond half..mechanic told me to fix engine block and machine shop again cylinder...


the gauge is going above half, but is it actually over heating? could be a faulty coolant temp sensor sending an incorrect temperature. when you changed the radiator, was the rad cap also changed? if the cap is not holding correct pressure, it will lower the boiling temp of the coolant and cause it to overheat. an infra red thermometer is very useful for diagnosing this, point it at the thermostat housing and see what the temp is there, that will tell you whether the temp gauge is accurate or not. good luck!

May 19, 2010 | 2004 Honda Civic

2 Answers

Water not circulating through engine


Does your engine overheat? Could be a thermostat that is stuck, let me know with some clarification and i can help ou better. Thanks

Dec 17, 2009 | 1998 Buick Century

2 Answers

2002 honda civic water is blowing out of the coolant tank


Sorry to hear all this has been going on and the obvious hasn't been detected by a shop. All those parts probably would not of had to be replaced. This is a classic systom of a blown head gasket. Not every head gasket blown will have coolant in the oil. Compression leak from a cylinder will enter water passage in head and blow out the coolant because compression is greater pressure than coolant system pressure.

Dec 12, 2009 | 2003 Honda Civic

1 Answer

95 honda civic lx overheating


COULD BE COOLANT SENSOR,HEAD GASKET,CHECK THE TIMING,THE PROPER MIXTURE OF COOLANT,WATER PUMP.DID YOU HAVE IT CHECKED OUT?ANY LEAKS?HEAT WORK WITH FAN?

Jan 08, 2009 | 1991 Honda Civic

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