LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Cooling issues

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Old Oct 6, 2008 | 06:50 PM
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Default Cooling issues

Ok, here's my dillema. My cluster temp gauge has been acting up the last few weeks so I went ahead and installed a scan gauge to see if the pcm was getting roughly the same reading and they were completely different. I have been ignoring the cluster gauge but lately it has been getting hot so today I let it idle and the fans turn on when they are suppose to.
The thermostat is a 160 and I did have it out of the car earlier this summer and boiled it just for the hell of it and it was fine. Other then that I haven't messed with the cooling system all summer so unless an air bubble just appeared for no reason that shouldn't be an issue.
I have a custom radiator from OFI and 2 spal fans that are less than a year old.
When the car got hot only two radiator hoses were hot too. THe upper hose that goes to the t-stat and the small d.s. 90* fitting that goes to the lower d.s. radiator were hot and the rest were cold.

What do you guys think? I will try and bleed it but I wonder if the water pump has taken a **** hence no circulation and some hoses still cold? It isn't leaking out the weap hole and it isn't squealing.
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Old Oct 6, 2008 | 08:24 PM
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I would try to bleed system. Might have an air pocket in it. Other than that the T-stat might not be opening.
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Old Oct 6, 2008 | 08:29 PM
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I just went to bleed it and there was no coolant in the upper hose to bleed and the whole time it ran it just blew steam out the hole. WTF?
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Old Oct 6, 2008 | 09:17 PM
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let it bleed off untill u see coolant. You may need to fill with water a few times but keep letting it bleed. u have some major air in the lines
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Old Oct 6, 2008 | 09:56 PM
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The expansion tank I have to fill through is full. The car ran for probably five minutes and I shut it down at about 225. Not a drop of coolant came up through the bleeder.
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Old Oct 6, 2008 | 10:34 PM
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........................ Thats a little weird. Have you tried it with out a T-stat at all. You wont get any heat worth a crap.
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Old Oct 7, 2008 | 06:22 PM
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I haven't tried without the thermostat. The heater was still blowing cold when I shut the car off. I think I'll keep trying to bleed it a few more times.
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Old Oct 7, 2008 | 06:38 PM
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Try to get the front of the car off the ground some, so that the bleeder screw is the highest point in the system.

Sara Lou
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Old Oct 7, 2008 | 06:55 PM
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I tried it again and no go. My driveway is really steep so the front was up pretty high. I'm betting on the water pump, its a good excuse to go to an electric i guess.
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