Thermostat question

585Soup

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Mar 12, 2015
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After fixing the coolant leak(keeping fingers crossed still)...I drove her to work today. On the way I got concerned as the temp gauge rised above half way. So I pulled over, shut it off and looked to see if it was pissing coolant. Nothing was leaking. I get back in the car and the temp gauge drops down to about 2/5ths, like it should. It did the same thing on the way home. Do I maybe have the wrong temp thermostat? I plan to just remove it tomorrow as this is only a summer car for me. Any issues by removing it that I should know of? I know it'll take longer to warm up, but the car should run cooler and not scare me by running hot like that temporarily.
 

585Soup

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Mar 12, 2015
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Yeah pretty much. I let it run the other day for an hour while checking to see if it still leaks. Guess I'll try and burp it tomorrow morning.
 

585Soup

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Mar 12, 2015
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I ended up jacking the front up as high as I could and let it run for a good 30 minutes. After it spilling a lot of coolant out, it finally dropped and I was able to add about half a quart or so of coolant. There were a ton of little air bubbles as well before it dropped. So I might be good now. We'll see on the way to work
 

Nick M

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Sep 9, 2005
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Thermostat maintains a minimum temperature, not a maximum temperature. The cooling system (radiator, coolant/water mix, fan, shrouds, water pump) maintain maximum temperature.
 

585Soup

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Mar 12, 2015
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drove it to work and no real issues. it did at one point, start to rise up about 2 notches, but it then dropped back down. so i'm guessing theres still a little air trapped in it. for now though, it should help ease my worrying. i'll bleed it more this weekend
 

gsxr141

Active Member
Oct 24, 2010
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huh. i just heard that noise while driving yesterday.
i've been trying to diagnose why my car pushes coolant out of the overflow when i get on it.
the gauge never goes past halfway.....
 

585Soup

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Mar 12, 2015
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no sound behind dash. it did that before...and pushed out coolant. found a few leaky hoses that were allowing air in the system previously, which is what was probably causing it
 

suprarx7nut

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Nov 10, 2006
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gsxr141;2049900 said:
huh. i just heard that noise while driving yesterday.
i've been trying to diagnose why my car pushes coolant out of the overflow when i get on it.
the gauge never goes past halfway.....

Coolant overflow under load can be a sign of a blown head gasket. Water jackets dont seal -> combustion gas pressure leaks into the water jacket and pushes coolant out anywhere it can -> overflow fills and purges coolant.
 

585Soup

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Mar 12, 2015
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Colorado
my thermostat was brand new. it was definitely an air bubble for me. bled it again this morning, after last night having it rise up a bit and drop again. the drive to work today, it got to 2/5ths, 1/3rd.. which ever, and didn't go any higher. So crossing my fingers, thinking it's resolved.

Gsxr - has your HG been replaced? if not, even check your head bolts. when i replaced mine, the front two bolts were loose, loose enough to where i could have removed them by hand. under compression, it could be forcing exhaust gasses into the coolant jackets in the front.
 

gsxr141

Active Member
Oct 24, 2010
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rochester
i'm pretty sure it is the hg. the bitch of it is, i just rebuilt the motor and used a titan hg.
it's all good........ i'm putting in a completely built motor and head on saturday.
i'll just fix this one and sell it.