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1992 Corvette Coupe Vibrating

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Old Jun 3, 2010 | 10:18 AM
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Default 1992 Corvette Coupe Vibrating

The other day I test drove a 92 coupe. After about 20 minutes of driving it around town I decided to take it on the highway. I was driving at 60-65 mph and the car seemed fine until it began to vibrate very badly. I have no idea where this was coming from but it did feel like a flat tire. I pulled into the nearest exit and saw that none of the tires were close to being flat and the car sounded fine at idle. I took it back on the highway and it drove fine until I got back into town where it began doing the same thing. I then noticed the temp was very high (around 235). I drove it back to the dealer poped the hood and the upper radiator hose was blown up like a baloon. It looked as if it was about to pop. I showed it to the salesman and he has since had it "fixed" and checked again. Has anybody experienced anything like this before? The bad vibrations or the radiator hose?
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Old Jun 3, 2010 | 10:19 AM
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By the way I am not "zipnz" I am his son. Any input is greatfully appretiated before I go back and drive it again.
-Thanks!
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Old Jun 3, 2010 | 10:32 AM
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dunno about the vibrating (kinda having that issue with my 90 too) but the radiator hose thign sounds like maybe a bad thermostat.
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Old Jun 3, 2010 | 10:56 AM
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Originally Posted by zipnz
The other day I test drove a 92 coupe. After about 20 minutes of driving it around town I decided to take it on the highway. I was driving at 60-65 mph and the car seemed fine until it began to vibrate very badly. I have no idea where this was coming from but it did feel like a flat tire. I pulled into the nearest exit and saw that none of the tires were close to being flat and the car sounded fine at idle. I took it back on the highway and it drove fine until I got back into town where it began doing the same thing. I then noticed the temp was very high (around 235). I drove it back to the dealer poped the hood and the upper radiator hose was blown up like a baloon. It looked as if it was about to pop. I showed it to the salesman and he has since had it "fixed" and checked again. Has anybody experienced anything like this before? The bad vibrations or the radiator hose?
Vibrations at speed often come from the rotating parts. Check:
Wheel balance
Alignment
wheel bearings
U-joints (axle and driveshaft)
axle and driveshaft balance

On my '92 coupe, I get vibration at ~80mph from the slightly broken targa top flapping in the wind.

The radiator stuff is probably unrelated to the vibration.
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Old Jun 3, 2010 | 12:12 PM
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Hose is most likely a bad hose.

Vibration could be a flat spot on the tire from sitting to long.
Loose lug nuts
Really rough road, when I drive on asphault roads with a ton of rocks in the asphault, backend vibrates real bad.
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Old Jun 3, 2010 | 01:13 PM
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Originally Posted by Sinistrad
Vibrations at speed often come from the rotating parts. Check:
Wheel balance
Alignment
wheel bearings
U-joints (axle and driveshaft)
axle and driveshaft balance

On my '92 coupe, I get vibration at ~80mph from the slightly broken targa top flapping in the wind.

The radiator stuff is probably unrelated to the vibration.


I would get a GOOD look at the universal joints (especially drive shaft). They seem to make the car vibrate at a higher frequency (and usually road speed) than a bad tire. Tires you can sometimes feel in the wheel, but with the U-joint the whole car and your seat seems to vibrate.

I have the radiator hose happen to me also, when it's replaced your done and fixed.
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