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PLEASE help... car overheating

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Old Aug 21, 2007 | 03:53 PM
  #1  
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Default PLEASE help... car overheating

Hey guys can someone PLEASE help me out.

I live in the desert and the last month the temperature has ranged between 100 and 107 hot dry heat.

My 2001 vette with 101,000 miles has been running anywhere between 220 and 230. About 235 when i stop. I have thought this was high and someone reccomended wetter water.

I put wetter water in yesterday and today it is 101 which is lower than the last few days and now it was running at 240 the whole time even while driving fast and got to 250 when i was stopped and this is without the AC on!

can someone help me i am very frustrated and worried. I also do not want to go to a mechanic yet because it is so easy to get ripped off when you dont know anything.
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Old Aug 21, 2007 | 03:59 PM
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Originally Posted by Jhyten
Hey guys can someone PLEASE help me out.

I live in the desert and the last month the temperature has ranged between 100 and 107 hot dry heat.

My 2001 vette with 101,000 miles has been running anywhere between 220 and 230. About 235 when i stop. I have thought this was high and someone reccomended wetter water.

I put wetter water in yesterday and today it is 101 which is lower than the last few days and now it was running at 240 the whole time even while driving fast and got to 250 when i was stopped and this is without the AC on!

can someone help me i am very frustrated and worried. I also do not want to go to a mechanic yet because it is so easy to get ripped off when you dont know anything.

I would start with having your radiator cleaned. It's the cheapest and probably the most likely culprit. These things are like vacuum cleaners. You will not believe how much stuff will get blown out. Also, you could try having your fan settings turned down, either with a handheld programmer or a tuner.
Ed
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Old Aug 21, 2007 | 04:18 PM
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i called the mechanic and he said to have the radiator flushed and cleaned and everyhting it would be 200 and that i use the expensive coolant dexacool or something like that.

is that sound about right guys?
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Old Aug 21, 2007 | 04:18 PM
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Have you looked under the car. The Vette is a "bottom feeder" and its possible to get all sorts of debris into the intake. I imported a Walmart carier bag to UK when I shipped the car. A good clean may improve matters.
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Old Aug 21, 2007 | 04:28 PM
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Originally Posted by DeeGee
Have you looked under the car. The Vette is a "bottom feeder" and its possible to get all sorts of debris into the intake. I imported a Walmart carier bag to UK when I shipped the car. A good clean may improve matters.
Get the car up on a lift and look at the front of the radiator - all kinds of debris collects in there. There are a couple of companies that market a screen to help keep junk out.
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Old Aug 21, 2007 | 05:15 PM
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Originally Posted by HummelS
Get the car up on a lift and look at the front of the radiator - all kinds of debris collects in there. There are a couple of companies that market a screen to help keep junk out.


Most likelyu you will find an Albertsons bag & a ton of weeds, feathers, & grass.
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Old Aug 21, 2007 | 05:25 PM
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Can you clean up that area with a garden hose, that be the a/c condensor?

Last edited by Normseven; Aug 21, 2007 at 05:25 PM. Reason: added a/c
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Old Aug 21, 2007 | 05:37 PM
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I used a cheap air compressor line with a bend at the end that I bought at Harbor Freight for something like $4.95. Between the radiator and the condensor blowing the rocks back out the front.
Also, when you are in the heat, run the AC. That will keep the fans on therefore the car will run cooler. Up in Victorville at this time of the year, you need the AC anyway. I know, I lived there for 5 years long ago. I'm down the hill from you now.
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Old Aug 21, 2007 | 05:49 PM
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I agree with the rest of the posts...it's probably some blockage on the radiator. You have to raise the car and look way up towards the top of the intake area around the radiator. You will probably find all kinds of small stuff like grass clippings, leaves and paper packed in there. I found a styrofoam cup, part of a hamburger wrapper and a handfull of grass clippings up there a couple of weeks ago...and it had only been a couple of months since I had cleaned it last.
I am running 11.2:1 compression and the temp shoots up pretty quick if anything disrupts the air flow in mine, so I check it several times during the summer driving season or if I notice the temps rising.
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Old Aug 21, 2007 | 05:57 PM
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Originally Posted by 99mallett
I agree with the rest of the posts...it's probably some blockage on the radiator. You have to raise the car and look way up towards the top of the intake area around the radiator. You will probably find all kinds of small stuff like grass clippings, leaves and paper packed in there. I found a styrofoam cup, part of a hamburger wrapper and a handfull of grass clippings up there a couple of weeks ago...and it had only been a couple of months since I had cleaned it last.
I am running 11.2:1 compression and the temp shoots up pretty quick if anything disrupts the air flow in mine, so I check it several times during the summer driving season or if I notice the temps rising.

.
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Old Aug 21, 2007 | 06:18 PM
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When my 99 gets hot(230-235) during city driving, I turn on the AC and the temp goes down to about 200. Turning the AC on turns on the fans.
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Old Aug 21, 2007 | 07:01 PM
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I had the same problem a month or so ago, cleaned out behind the radiator as mentioned by others. There was a profound amont of trash, car runs much cooler and A/C is awesome now. It has been running over 100 degrees here in GA for a few weeks. My coolant temp runs about 198-207 now.
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Old Aug 21, 2007 | 07:27 PM
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As I was reading this I noticed. Jhyten you said flushed. What everyone is talking about it the dirt and debris that collect on the outside of the radiator and condensor fins. Dirt gets packed between the condensor and radiator and will block airflow between the two.

Remove the (4) 10mm bolts that hold the upper rad shroud on and look between them, then use a shopvac to suck the large peices of crud out. Then while there take a air hose and blow in the reverse direction of normal airflow to push out the tiny parts that remain.

Dave
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Old Aug 21, 2007 | 09:58 PM
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Originally Posted by CTSV OWNER
As I was reading this I noticed. Jhyten you said flushed. What everyone is talking about it the dirt and debris that collect on the outside of the radiator and condensor fins. Dirt gets packed between the condensor and radiator and will block airflow between the two.

Remove the (4) 10mm bolts that hold the upper rad shroud on and look between them, then use a shopvac to suck the large peices of crud out. Then while there take a air hose and blow in the reverse direction of normal airflow to push out the tiny parts that remain.

Dave
This is the best way to go, for sure. Getting crap out from the bottom while looking up sure helps, especially if you have a shopping bag or dead sea gull up there, but remember, all you're doing is cleaning the front of the air conditioning condenser.

To do the best job of cleaning the condenser and radiator, you have to do what Dave descibed. And be careful of the condenser and rad fins ..... they are delicate!!

RonJ ...
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Old Aug 21, 2007 | 10:30 PM
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My .02
Everybody that has posted to this has given good advice.........
I drive the Ventura Freeway Parking Lot in 105 degree days and do a variety of things
Every 6 to 8 months clean all the crap out of the condenser. (too lazy to put the screen on )
Every other year, flush the motor and replace coolant.
Reprogammed the fans to come on earlier.
Put in a 176 thermostat.
No matter how much it sits in traffic, never gets over 190-210.
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Old Aug 21, 2007 | 10:47 PM
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Like everyone else said, check to see if you sucked up a bag or something first. If you don't find anything, next I would check the coolant level. This is going to make me sound like an idiot, but I had the exact same problem about 2 weeks ago. Turns out, when I was done working on my car, I forgot to tighten the collant fill cap down. You can loose a lot of coolant this way due to evaporation, and you may or may not be able to see any steam. In my case, after adding about 1.5 gallons of water to the tank, everything was back to normal. The fact that I never got a low coolant message is what baffles me.
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Old Aug 21, 2007 | 11:05 PM
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Thanks guys! This forum is awesome. Problem solved! I think i sucked up a squirrel, a crow, a small deer, there was even a mustang gt in there that i ran over cause it was so slow. jk!

Thanks everyone!
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Old Aug 21, 2007 | 11:21 PM
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Get a screen for your radiator, it helps keep the vermen out.

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Old Aug 25, 2007 | 02:49 AM
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Rookie here. After removing that top piece that covers the radiator, I sprayed a light flow water with a garden hose down the front of the radiator (I didn't want to force the debris deeper into the front of the radiator). This improved my temperature problem big time in that it now only gets to 235 when sitting still in traffic with the AC on in 100 degree temperatures.

Problem is, I want to force the debris out the front of the radiator but how the hell do you get your hand in there? The way it looks to me is you have to pull the radiator out of the car to clean it. I know this will solve my issue simply because of the improvement that I am seeing with the little cleaning I did. Anyone have any pictures that I can go by to clean this thing? Thanks!
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Old Aug 25, 2007 | 07:29 AM
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Changing my fan settings made a WORLD of difference.
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