C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Still Gets HOTTT WTF!!!

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Old May 12, 2011 | 01:15 PM
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Default Still Gets HOTTT WTF!!!

i have changed the intake seal to stop leaking coolant, i put a new 180 t-stat in, i flushed the cooling system on the car (flushed the block out, fluched the radiator out). I cleaned away all the debree in front of the radiator, i have fresh coolant and coolant is full.......
I drive the car for 20-30 min and the temps go to OIL Temp 230, Coolant temp 227.... for real . what am i doing wrong what do i need to do................
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Old May 12, 2011 | 01:21 PM
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Those are normal temps.
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Old May 12, 2011 | 01:22 PM
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Coolant temps can reach 230 in stop and go traffic, i hit it daily on my way home in the summer time. Nothing wrong with it, as long as when you start driving it begins to come down.

My oil temps are generally lower than 230 tho, not sure what would cause oil temp to rise. Im sure someone will chime in.
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Old May 12, 2011 | 01:29 PM
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High oil temp can be a product of oil pressure. My oil runs 10* higher than my coolant temp.
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Old May 12, 2011 | 01:46 PM
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if i want your vette to run cooler reprogram the brain ,thats what controls the temp not your thermostat
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Old May 12, 2011 | 02:05 PM
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Originally Posted by marvinator
if i want your vette to run cooler reprogram the brain ,thats what controls the temp not your thermostat
Have someone tune it so the fans come on earlier if you want it to run cooler
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Old May 12, 2011 | 02:11 PM
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Did you burp the system?
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Old May 12, 2011 | 02:30 PM
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Originally Posted by PLRX
Did you burp the system?
There you go...Just what I was going to say but PLRX beat me to it.. Everything you listed that you did is correct, but if you didn't burp the system non of it matters, its going to heat up.......WW
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Old May 12, 2011 | 03:08 PM
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Originally Posted by PLRX
Did you burp the system?
I filled it up, ran it up to temp let it cool filled it up again, this time left cap off ran it up to temp let cool then refilled. i did this several times did i do it right or did i just make up my own thing again????
also i seem to get an intermidant coolant low light on my control panel, it doesnt always come on but it will light up for a breif second then go right back off (usually about 5 min into my drive if it comes on, doesnt always come on)

Last edited by 69SSC5; May 12, 2011 at 03:10 PM.
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Old May 12, 2011 | 03:16 PM
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I found these things are the key to cool running.

1. Clean the debris out of the radiator
2. Replace the stock radiator with a DeWitts.
3. Use a 180 stat
4. Program the ECM to turn on the both fans earlier (I have an Ostrich to do that).
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Old May 12, 2011 | 03:32 PM
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Originally Posted by Heimlich2010
I filled it up, ran it up to temp let it cool filled it up again, this time left cap off ran it up to temp let cool then refilled. i did this several times did i do it right or did i just make up my own thing again????
also i seem to get an intermidant coolant low light on my control panel, it doesnt always come on but it will light up for a breif second then go right back off (usually about 5 min into my drive if it comes on, doesnt always come on)
I've learn on this forum that for the L98 you need to raise the front end as high as high you can. The LT1 is easy, it has a bleeder.
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Old May 12, 2011 | 04:10 PM
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Originally Posted by PLRX
I've learn on this forum that for the L98 you need to raise the front end as high as high you can. The LT1 is easy, it has a bleeder.
so your saying to raise the front end as high as i can, take off the radiator cap and run it up to temp, shut it off let it cool, add more fluid run it up to temp again, let cool add more fluid?
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Old May 12, 2011 | 04:29 PM
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......... Once a year you need to clean the trash from between the radiator and the AC condenser ..... if you haven't been in there yet you will be amazed .....
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Old May 12, 2011 | 05:20 PM
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Originally Posted by marvinator
if i want your vette to run cooler reprogram the brain ,thats what controls the temp not your thermostat
Then what is the purpose of the thermostate?
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Old May 12, 2011 | 05:28 PM
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To get the engine up to operating temp faster than it would without one.
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Old May 12, 2011 | 05:32 PM
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Replace the stock radiator, with a new stock radiator $100 and will guarantee a drop in temps
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Old May 12, 2011 | 05:32 PM
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Originally Posted by powerpigz-51
To get the engine up to operating temp faster than it would without one.
So it does not have anything to do with rregulating temp?
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Old May 12, 2011 | 06:00 PM
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Only when it is closed.
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Old May 12, 2011 | 06:33 PM
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any ideas on why my coolant low light comes on and goes off????
also what controls the oil temp? what is normal Stop and Go heavy traffic oil temps?
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Old May 12, 2011 | 06:45 PM
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If you think that you are running hotter than normal, I suggest removing the radiator and cleaning the fins out. Just removing the debris in front is not enough. You can use a pressure washer, but very gently with the wand on a fan spray. You will not believe the dirt that will come out of there. You can also by a adjustable fan thermostat to wire your main fan to, they have a little bulb that sits in the radiator hose. Then the fan will come on at any temp you want.
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