it could be that you've put too much coolant to percentage of water in
the heater core could be pluged or the heater control valve is stuck closed
a new heater core
it is possible that you have a faulty thermostat or you have air pockets in the new radiator when the new coolant was added
The engine coolant on a 1991 Honda Civic is replaced by turning the drain petcock and releasing the coolant. The filler cap is then removed and coolant added until the system is full again.
probley because you have the heater on That was a poor answer, and the question deserves better. When accelerating, the car's engine generates higher RPM's, which causes the water pump to spin faster. This added pressure from the water pump is sometimes enough to push coolant past a heater core that is having problems (perhaps you have a clogged heater core - this can be remedied by reverse-flushing the heater core). Others have also suggested that the car exhibiting the symptoms may have a low coolant level. The added pressure from the water pump at higher RPM's is enough to allow even a car with a low level of coolant to circulate some of the coolant through the heater core. It might also be worth checking your coolant levels if you have not already done so (note that you should check not only the coolant reservoir, but also the level of coolant within the radiator itself). Good luck.
I own a 1995 Rodeo V6 and in the winter of 2008-2009 the heater stoped working, I replaced the thermostat and I got heat right away, Alternators go out usually when you have extra stuff added like amplifiers, I did replace mine but only as a prev maitanence.
I asked my mechanic about that and he said it was under the intake manifold. about 400 dollars to repair. On the other hand I was low on coolant, so I added coolant and it started warming up faster and the temperature gauge wasn't so high either. So I didn't have to repace thermostat. good luck I asked my mechanic about that and he said it was under the intake manifold. about 400 dollars to repair. On the other hand I was low on coolant, so I added coolant and it started warming up faster and the temperature gauge wasn't so high either. So I didn't have to repace thermostat. good luck
This question is not complete. . Need to know if you've replaced radiator, thermostat, hoses etc. Are you asking this question *after* yo checked the thermostat, changed, added or drained the system?
Your coolant mixture could be too light, and you may want to try thickening it by added less diluted or wholly undiluted antifreeze/coolant to it.
Have flushed complete cooling system replaced water pump radiator thermostat clutch fan added 2gal straight anti freeze then filled to capacity with water and truck is still over heating. What else could possibly be wrong
I have recently replaced Thermostat on my 1999 New Jetta GLS. Here is what I did and the replacement was successfull. First, the coolant has to be drained completely. Locate the drain at the bottom left side of radiator and drain the coolant from radiator. Then drain the coolant from the engine block. I did not do the second drain and got about 1 pint of coolant spilled during the thermostat replacement. Detach the hose from the thermostat housing cover at the front of engine block. Pull the metal hose clamp back over the hose. You will need wide angle pliers to loose the clamp. Reattachment during reinstallation will be more difficult. Remove the bolts/nuts and detach the cover. You will need 10mm size wrench (or Allen wrench) to do it. I got very anxious when I find out how inaccesible are the nuts. The Allen wrench would work better if I had one with the right size. Use screwdriver to gently remove the O-ring. It is recommended that you get a new O-ring. Remove the old thermostat, place the new one, then O-ring and the remaining steps are reverse of installation. Remember to close the coolant drains before refilling the cooling system - the old coolant can be reused. The coolant must be added gradually. The engine should be turned on for a while to allow the coolant to reenter all the space in the engine block and radiator.
Back flushing an engine refers to connecting a garden hose to a special coupler added to the heater core hose, then pumping fresh water through the system to clean out old coolant. This helps to insure that you have a clean coolant system.