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Old 01-04-2011, 07:20 PM   #1 (permalink)
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phall0106
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My 2004 Elantra (a bit over 100,000 miles) was running hot--the temp, which usually ran about the middle of the temp gauge, suddenly started creeping up to about 3/4 of the gauge, especially when I was going up hills. Once or twice, it got to the red part of the gauge. (I promptly pulled over and shut off the car when this happened.) All along, there appeared to be enough coolant and it never spewed coolant or anything. Before this started happening, I noticed that when idling, the heater wouldn't blow warm air (it actually turned icy cold), but when the car started moving again, the heater air got warm--I didn't think too much of this at the time.

Once the temp gauge started creeping above the mid-way point (and hit the red mark twice), I took it to the mechanics, who replaced the water pump, timing belt and the thermostat on it (to the tune of nearly $600!). Driving it home from the mechanics, when idling, the heater air was nice and toasty. Once the car warmed up, I noticed that the temp gauge was running about midpoint (half way) like it usually did, but a quite few times (again, going up the hills), it was creeping closer to the 3/4 mark (but not in the red).

Is this normal, or does it sound like something isn't right with the thermostat (or god forbid, another part of the car)? I don't think this was "normal" before the thermostat went out (I'm thinking it hovered around the mid-way point on the temp gauge), but I can't be 100% sure. I'll call the mechanic again tomorrow to get his thoughts, but I didn't want to seem paranoid if this isn't something to worry about. Yet again, I don't want the car to run hotter than normal and have it do damage to the engine...
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Old 01-04-2011, 11:15 PM   #2 (permalink)
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I would let your mechanic know that your still not seeing what you consider "normal" temperatures compared to what you were used to seeing.
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Old 01-09-2011, 01:04 PM   #3 (permalink)
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In case anyone comes across this with a similar problem, I wanted to post an update.

After driving the car for a few days with the temperature gauge running higher than normal (what it had in the past), and even creeping up to about 3/4 of the way on the gauge, I took the car back to the mechanics.

They said there was an air bubble in the cooling system, and although I'm not sure what they did, it's running perfectly now--the temp gauge is slightly below the half way mark (which is where it was normally).
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Old 01-09-2011, 01:49 PM   #4 (permalink)
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He should have checked for the air bubble after he refilled your cooling system.
He was in a hurry.

All you have to do is run the car about 10 minutes "don't let it overheat"
let it set for 5 minutes then carefully remove the radiator cap start the car add coolant till full
replace the cap and check and top off the overflow tank to the proper level.

here is something else you can look for too.

Is both of your Radiator Fans turning on?
Is your cooling system fluid clean with the overflow bottle and radiator filled properly?
Is your radiator and air conditioner condensor fins clean?
Here's a tip to help keep you from frying your motor if it is getting hot, turn your heater on high blower and temperature
this will help as I had a sticking thermostat and doing that got me home without overheating the motor.
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Old 01-10-2011, 06:33 AM   #5 (permalink)
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QUOTE (phall0106 @ Jan 4 2011, 07:20 PM)
Quote:
My 2004 Elantra (a bit over 100,000 miles) was running hot--the temp, which usually ran about the middle of the temp gauge, suddenly started creeping up to about 3/4 of the gauge, especially when I was going up hills. Once or twice, it got to the red part of the gauge. (I promptly pulled over and shut off the car when this happened.) All along, there appeared to be enough coolant and it never spewed coolant or anything. Before this started happening, I noticed that when idling, the heater wouldn't blow warm air (it actually turned icy cold), but when the car started moving again, the heater air got warm--I didn't think too much of this at the time.

Once the temp gauge started creeping above the mid-way point (and hit the red mark twice), I took it to the mechanics, who replaced the water pump, timing belt and the thermostat on it (to the tune of nearly $600!). Driving it home from the mechanics, when idling, the heater air was nice and toasty. Once the car warmed up, I noticed that the temp gauge was running about midpoint (half way) like it usually did, but a quite few times (again, going up the hills), it was creeping closer to the 3/4 mark (but not in the red).

Is this normal, or does it sound like something isn't right with the thermostat (or god forbid, another part of the car)? I don't think this was "normal" before the thermostat went out (I'm thinking it hovered around the mid-way point on the temp gauge), but I can't be 100% sure. I'll call the mechanic again tomorrow to get his thoughts, but I didn't want to seem paranoid if this isn't something to worry about. Yet again, I don't want the car to run hotter than normal and have it do damage to the engine...

Talk to your mechanic about this asap. it could be an air bubble caught in the cooling system. A bubble can cause a hot spot in the engine and cause premature wear. Chances are it just needs further cooling system bleeding.
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