?? coolant level hardly moves in resevoir after flush and UIM/LIM replacement - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-09-2014, 11:00 AM   #11
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A swing from cold to hot with a increase of a half inch would be normal.
Once the car is hot does it remain at the correct hot level?
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Old 03-09-2014, 11:03 AM   #12
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yup its stays when hot...but before I did the work it would go up and down an inch or maybe more.....everything else seems normal
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Old 03-09-2014, 11:15 AM   #13
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I would be watching for proper operating temperature when hot and maintaining that temperature; not so much of how much the overflow tank rises when hot or drops when cool. Most 3800s run around 200 degree on the gauge, I will be looking to see the needle hang at that number after warm up and staying at that number. If you are running under 180 after warm up I would be looking into that. Maintaining 195+ operating temperature would give me confidence the cooling system is sealed and running properly.
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Old 03-09-2014, 01:39 PM   #14
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I would be watching that you are not losing coolant, more than anything else.....always check cold......radiator should be full, and the reservoir at the cold mark.....
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Old 03-09-2014, 02:16 PM   #15
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Did you replace the radiator cap when you did all of this work by chance?
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Old 03-09-2014, 02:59 PM   #16
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nope same cap and it IS working properly...it holds temp when running down the highway..was running 197-198 the other day but today it was only 2 degs so it was like 188...it is a brand new stat 195 deg
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Old 03-09-2014, 08:16 PM   #17
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As long as the engine is staying at its normal operating temp, and you are NOT losing coolant, you are fine.
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