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Unread 09-10-2008, 08:51 PM   #1
ClockworkC5
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Default 160 stat. still running hot

i installed a hypertech 160 stat a week ago and have the fans tuned to turn on at 180. the fans are turning on but it still running hot at times. theres plenty of coolant. i filled it back up with dexcool. not leaking fluid. any ideas? before when i had the oem stat i never went over 196. so i dont really think its the water pump. also just out of curiosity. our ls1 water pumps, when they start taking a dump to they piss coolant out like the lt1s?
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Unread 09-10-2008, 11:30 PM   #2
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Quote:
Originally Posted by ClockworkC5 View Post
i installed a hypertech 160 stat a week ago and have the fans tuned to turn on at 180. the fans are turning on but it still running hot at times. theres plenty of coolant. i filled it back up with dexcool. not leaking fluid. any ideas? before when i had the oem stat i never went over 196. so i dont really think its the water pump. also just out of curiosity. our ls1 water pumps, when they start taking a dump to they piss coolant out like the lt1s?
When you change out the Thermostat you get air into the coolant system. You MUST run the engine up to operating temps with the cap off the coolant tank to allow the air to escape. You should also use a mix of 50% Dexcool and 50% Distilled water.

Check your radiator. They get clogged with small stuff. Take a garden hose set on "spray", not a heavy stream, and try to wash out the debris in your radiator fins.

Good Luck...
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Unread 09-10-2008, 11:43 PM   #3
LS2POWA
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I remember my motor running hot w/ 160 tstat and fans on early. Took a week or so to gets the burps out, but even now itll run around 196.
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Unread 09-11-2008, 07:53 AM   #4
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Quote:
Originally Posted by LS2POWA View Post
I remember my motor running hot w/ 160 tstat and fans on early. Took a week or so to gets the burps out, but even now itll run around 196.
Thats normal for my car too. Occasionally my C5 will get to 220 if it's a real hot day and I'm in city traffic.
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Unread 09-11-2008, 08:20 AM   #5
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Put it up on a lift and look up in front of the A/C condensor & between the radiator & condensor.....you may find it all full off feathers, leaves, grocery bags, sand, etc. A bottle brush taped on a dowl and a long reach air fitting and you can clean it out. Also, the higher the percentage of antifreeze to water, the lower the ability to transfer heat. 100% water is the best, but then there is no corrosion protection. If not running in the northern climates where freezing is a threat 70% water, 30% dex cool & a bottle of water wetter will give the best results.
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Unread 09-11-2008, 09:05 AM   #6
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thanks for the info everyone. im running about 50/50. everytime i ran the car i opened the coolant fill area to let some air out. the radiator is clean and clear of debris, was just down there changing out the ac tensioner pulley. i didnt know about the dexcool inhibiting heat transfer. should i use a water wetter or similiar?
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2000 white C5
blackwing intake/descreened maf
ported & polished throttle body
160 hypertech stat
taylor thundervolt wires
tb coolant bypass
slp short tube headers
borla quad stingers
anti-venom/tampa tune
cross drilled and slotted rotors
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Unread 09-12-2008, 10:02 AM   #7
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A 160 stat will not make your car run cooler. It will only delay it getting to maximum temp as it opens earlier and allows circulation, thus delaying warming up. Make sure your radiator is perfectly clean and your fans are working properly. I've used water wetter before with good results, about a 10degree decrease in temp. You may want to try that.
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Unread 09-12-2008, 10:42 AM   #8
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in my lt1 formula, i hard wired the fans and had a 160 stat and i never got over 170. yesterday my car was running at 210.
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2000 white C5
blackwing intake/descreened maf
ported & polished throttle body
160 hypertech stat
taylor thundervolt wires
tb coolant bypass
slp short tube headers
borla quad stingers
anti-venom/tampa tune
cross drilled and slotted rotors
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Unread 09-12-2008, 10:47 AM   #9
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good info on the water/dexcool ratio. i didnt know that dexcool actually inhibits heat transfer
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2000 white C5
blackwing intake/descreened maf
ported & polished throttle body
160 hypertech stat
taylor thundervolt wires
tb coolant bypass
slp short tube headers
borla quad stingers
anti-venom/tampa tune
cross drilled and slotted rotors
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Unread 09-12-2008, 10:47 AM   #10
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Here's a thread I posted a little while back about my experiences.....

http://www.corvetteflorida.com/forum...ad.php?t=18347
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