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Old May 7, 2010 | 07:03 PM
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Default Check coolant level

So leaving work today I got the check coolant level on the DIC. I have never got that before. I checked the surge tank located below the clutch and brake fluid reservoir and it has coolant in it. Is there another way to check the coolant? The radiator is covered by the plastic surrounding the intake shroud.
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Old May 7, 2010 | 07:36 PM
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I have an 05 and in these past years this has happened about 3 times. Each time visual inspection shows level right where it's supposed to be. I added the smallest amount of fluid and that seemed to satisfy the system that was indeed full.
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Old May 7, 2010 | 08:04 PM
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thanks, so the surge tank is the only way to check the level of fluid?
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Old May 7, 2010 | 08:07 PM
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Yea, I believe if you're ok in the tank you're ok in the entire system.
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Old May 7, 2010 | 08:34 PM
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check the coolant level from the front of the tank where there is a mark for full.
still hard to see if your engine bay is dirty like mine, i have to shine a flashlight at the tank and maybe even jiggle the tank a bit to see the coolant level vs. the mark in the front of the tank.
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Old May 7, 2010 | 09:10 PM
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That alert is triggered by some tricky temperature measurements rather than any absolute level test so is most likely to occur if you don't let the engine warm up before taking off. That's my experience anyway.
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Old May 7, 2010 | 09:32 PM
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Umm,.... there's no "warm up" needed on the C6. Just try not to nail it before your oil temps are up to 150 degrees.
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Old May 7, 2010 | 09:52 PM
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Why doesn't the Corvette have a radiator cap on top of the radiator like other cars?
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Old May 7, 2010 | 10:01 PM
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Originally Posted by aseipos
That alert is triggered by some tricky temperature measurements rather than any absolute level test so is most likely to occur if you don't let the engine warm up before taking off. That's my experience anyway.
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Old May 8, 2010 | 12:06 PM
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LS WON, Two reasons for no fill cap on the radiator: 1. There is not enough height to package it and be useful. 2. The surge tank is by design the high point in the cooling system. The pressure/fill cap on the surge tank is at the best location for function and accessability. I hope this answers your question.
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Old May 8, 2010 | 03:01 PM
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Originally Posted by Bill Suttie
LS WON, Two reasons for no fill cap on the radiator: 1. There is not enough height to package it and be useful. 2. The surge tank is by design the high point in the cooling system. The pressure/fill cap on the surge tank is at the best location for function and accessability. I hope this answers your question.
Thanks for that info. I'm wondering then why didn't the dealership do it the other way mentioned here of removing the lower radiator hose which I have never done or am familiar with of that method.

(If you do it this way removing lower radiator hose, how can it be flushed with water as there is still no radiator top but only the plastic bottle?) Dealership told me you can not flush because of the system with plastic bottle.

Or is it just a gravity drain then insert lower radiator hose back on?.

I'm used to removing cap on top of radiator and inserting hose in and flushing system out through draincock till water comes out clear while vehicle is running.

Otherwise changing coolant was done just by draining through petcock and then just adding what is being replaced not getting most of everything out with the old stuff and in with the new stuff.
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Old May 9, 2010 | 10:36 AM
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LS WON You can do what you have always done ie drain at the valve at the bottom of the radiator tank while adding fresh water at the surge tank cap opening. Doing this is frowned upon by the EPA if you are letting it run down your driveway and gutter. Glycol is a poison to animals that like its sweet taste. Your dealer should have the proper equipment to extract the old coolant an install new.
When you add flush water at the surge tank it travels via the 3/4" hose from the tank to the engine side of the T-Stat through the engine and back to the LH radiator tank. The problem with this is you now have tap water left in you cooling system to contaminate your fresh coolant.
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Old May 10, 2010 | 12:43 AM
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Originally Posted by Bill Suttie
LS WON You can do what you have always done ie drain at the valve at the bottom of the radiator tank while adding fresh water at the surge tank cap opening. Doing this is frowned upon by the EPA if you are letting it run down your driveway and gutter. Glycol is a poison to animals that like its sweet taste. Your dealer should have the proper equipment to extract the old coolant an install new.
When you add flush water at the surge tank it travels via the 3/4" hose from the tank to the engine side of the T-Stat through the engine and back to the LH radiator tank. The problem with this is you now have tap water left in you cooling system to contaminate your fresh coolant.
That's probably what did in my 3 row radiator on my other car is the water I used to flush out the system till the fluid came out clear with engine running.
The only way to keep it from getting contaminated is just to drain what is in radiator then add 1 gal. of distilled water in bottle and one bottle of anti-freeze in bottle. No flush involved. This is an easier way but not a complete way.
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Old Jun 30, 2010 | 01:27 AM
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I am on my second high-comp 418 engine, and I have been dealing with the "check coolant level" with both engines. As others have stated, apparently an algorithm is used (rate of temperature increase?) to determine whether or not the coolant is working properly.

For me, if I let the car warm up too long the "check coolant level" is triggered. If I get the car moving relatively soon (after starting) then I am almost always OK. I think a moving car, provides just enough extra cooling to prevent the algorithm from tripping.

If anyone has any suggestions...I would appreciate it!
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Old Jun 30, 2010 | 01:34 AM
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Originally Posted by Bill Suttie
LS WON You can do what you have always done ie drain at the valve at the bottom of the radiator tank while adding fresh water at the surge tank cap opening. Doing this is frowned upon by the EPA if you are letting it run down your driveway and gutter. Glycol is a poison to animals that like its sweet taste. Your dealer should have the proper equipment to extract the old coolant an install new.
When you add flush water at the surge tank it travels via the 3/4" hose from the tank to the engine side of the T-Stat through the engine and back to the LH radiator tank. The problem with this is you now have tap water left in you cooling system to contaminate your fresh coolant.
I don't use tap water in the Corvette because I can't flush it like a regular car. So I just remove what's in the radiator as dealership did then add a gallon of coolant and a gallon of distilled water.
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Old Jun 30, 2010 | 01:36 AM
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Originally Posted by MrDrezzUp
I am on my second high-comp 418 engine, and I have been dealing with the "check coolant level" with both engines. As others have stated, apparently an algorithm is used (rate of temperature increase?) to determine whether or not the coolant is working properly.

For me, if I let the car warm up too long the "check coolant level" is triggered. If I get the car moving relatively soon (after starting) then I am almost always OK. I think a moving car, provides just enough extra cooling to prevent the algorithm from tripping.

If anyone has any suggestions...I would appreciate it!
Have you tried Red Line Water Wetter?
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Old Jun 30, 2010 | 02:01 AM
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Originally Posted by LS WON
Have you tried Red Line Water Wetter?
I haven't, but at this point I would do the chicken dance if someone said it would help. I will check into the Red Line Water Wetter. Thank you.

I am also thinking about posting my issue at HP Tuners. Perhaps the HP Tuner software could be updated to "massage" the coolant algorithm a bit.
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Old Jun 30, 2010 | 04:14 AM
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Originally Posted by tentorium
I have an 05 and in these past years this has happened about 3 times. Each time visual inspection shows level right where it's supposed to be. I added the smallest amount of fluid and that seemed to satisfy the system that was indeed full.
Ditto... This happened to me within the first week I owned the vehicle. Added a very small amount of coolant to the reservoir which fixed the problem.
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Old Jun 30, 2010 | 08:44 AM
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Default happened to me once...

Like some of the fellas here said, I started it up and nailed it very shortly after giving me that message for my 30 mile cruise home. After that I always let the engine temps come up before stomping on it and am yet to see the message again.
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Old Jun 30, 2010 | 09:16 AM
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i had the check coolant level msg and it was the water pump leaking so i had to replace the unit, so check yours just in case
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