I replaced the thermostat and checked all the hoses it is loosing a little coolant but not much. my fans wont kick on and my heater blows cold air. when i drive the temp gauge goes from normal to hot and then drops back down.....im stumped!!!!
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Re: my 1994 acura legend keeps overheating
Hi there..... there could be a number of things wrong here. 1st, when you refilled the rad and system with coolant, did you purge the system and get the air out? If not this can cause your no heat and no fan problem because you fan switch is probably not submerged in the coolant therefore not getting the proper temp. to turn on the fans. it can also cause the no heat because the coolant isn't circulating properly.
If you purged the system, then you might have a bad fan switch and thats why it's not turning your fans on. The no heat could be a clog in the heater core.
From What you described in your complaint, it sounds like you have air in the system. I would take the rad cap off and let the engine run and warm up. Allow the thermostat to open and let the coolant circulate. This should help it out.
I had the same problem and it got to the point to where the car was barely even drivable. I changed the radiator, thermostat, and water pump but to no avail. Then i finally broke down and decided to change the head gaskets and that did the trick. An easy way to determine whether or not it is a head gasket is to pull your spark plugs out and see if they are wet. If so then you need to replace your head gasket. Hope this helps
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How do you know that the head gasket is good? even with a bad thermostat it would not overheat in 3-5 min, a bad fan or relay would not make it overheat so fast , this sounds like a bad waterpump that has a bad impeller that does not circulate the coolant , but would not take coolant , if you are going through coolant and overheating that fast i would say head gasket but if you were not loosing coolant i would say to check the water pump impeller, i have seen them rust away or break,
check and bleed your coolant. take of radiator cap, start the car witht the heat on defrost and set to max and let the car fully warm up to operating temp adding coolant to radiator as needed. If that doesnt fix it then change your thermostat. $20 part from autozone with gasket. to do this: follow upper radiator hose to motor, where it connects on is your thermostat housing, unbolt the thermostat housing and replace thermostat. Simple procedure but do it when the car cools down or you'll burn your hands with coolant (which will pour everywhere when you take the hose off) after that is done, rebleed system and add coolant as needed. not hard to do at all
the biggest problem with the 3+liter honda engines of old is the weak head gaskets used on them..very rare you dont find one smoking or over heating..while the car is cool remove radiator cap and look for trace of oil.then start car with cap off and look for air bubbles.if either then its a bad gasket
The thermostat is located under the thermostat housing, which is on the engine, and what the upper radiator hose connects to. To remove the thermostat, you should : 1) start with a cool engine, 2) drain the coolant 3) disconnect upper radiator hose 4) unbolt thermostat housing. To install, reverse the process, but make sure you have a new gasket for the housing, and clean up the mating surfaces on both the housing and the engine.
Well if it were blowing antifreeze out into the jug you probably had a cracked head. When you pull the cap off does any water try to come out when you start it now? Yes it could still be a thermostat causing problems now but he probably should have changed it when he was changing the water pump. Did he replace either one of the heads or just a head gasket?
This could happen if your fan is indeed weak. To test disconnect the thermostat of the radiator by removing the terminals near the radiator hose towards the engine. You should see the fan run at its highest speed, then you can check if your fan has weakened.
My 1994 Acura Legend over heats. There isn't any coolant in the oil, nor white steam coming out of the tail pipe. All hoses are tight and no leaks are noted. The fans are working properly. However, there is back boiling in the radiator and loss of coolant...