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

LT1 gettin too damn HOT! Help!

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Old 06-24-2009, 01:57 AM
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Default LT1 gettin too damn HOT! Help!

I have a 93 M6 LT1 Formula and its been getting way to hot and i dont know whats wrong?

First thing i did was flush my radiator to see if it was plugged. Nope

Second thing, while installing a new Opti at the local GM shop i told them to check why my fans dont kick on, and they told me they come on at the right temp but my gauge is goin bad, so i believed them and just trusted that my gauge was bad and just gave up till finally coolant started bubbling one hot day.

Third I got an SLP fan switch so i could turn my fans on manually, to finally fix this damn problem but of course my gauge still hits red and the motor smells hot even after running both fans all day long while the car runs! so now i dont know what to do!

Please help any suggestions?
Old 06-24-2009, 02:17 AM
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sounds like the thermostat.
Old 06-24-2009, 02:21 AM
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Originally Posted by E$O3200
sounds like the thermostat.
Yeah I kinda thought that too, maybe i should try it!

My car sat for a year before i bought it so wonder if its all plugged up!
Old 06-24-2009, 07:27 AM
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Originally Posted by E$O3200
sounds like the thermostat.
+1 to thermostat....which i actually just put my 160 back in my car yesterday.
Old 06-24-2009, 07:30 AM
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First how did you clean the radiator? I use the Prestone stuff that says to leave it in and drive for a couple of hours not the 10 minute crap. I will drive it for a few days then flush it out. I had a supercharger and with the drag, AC on at a red light it would get hot very fast. I found a electric fan at the junk yard off of a Honda or something, like maybe a 10 inch and wedged it in front of the radiator. Wired it in to the stock fans and no more overheating...
Old 06-24-2009, 10:08 PM
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did you make sure to bleed out the system completely?? reverse cooled Lt1s are sometimes quite a b* to get completely bled.

For MoreHp-I would think a better solution for you would be an electric WP as the "drag" and low rpm would not effect the flow, i would actually think an electric fan placed in front of the radiator and with the factory electric fan on the rear side, this would be more ineffiecent than the factory setup. Make sure your fans are functioning at both speeds and have all the factory shrouds and housing

For everyone- if your car is running hot TURN CAR OFF IMMEDIATELY, especially if you smell burning

Last edited by Chevyguy358; 06-24-2009 at 10:18 PM.
Old 06-24-2009, 10:58 PM
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Im with Chevyguy on this one.... make sure it is bled completely again then Id go after the Therostat
Old 06-25-2009, 08:34 AM
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Originally Posted by Chevyguy358
For everyone- if your car is running hot TURN CAR OFF IMMEDIATELY, especially if you smell burning
And wait a good 15 minutes before trying to cool it down while not running with cold water.
Old 06-25-2009, 08:57 AM
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Originally Posted by WS Sick
And wait a good 15 minutes before trying to cool it down while not running with cold water.
something i love about having the fan toggle switch, being able to run the fan without it started.
Old 06-25-2009, 01:09 PM
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i have the same problem intermittendly (sp?) its not the thermostat or fans... it is the waterpump...... well in my case.
Old 06-25-2009, 08:53 PM
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Thanks for ur suggestions guys,
I'm considering the thermostat because the car started overheating the day i bought it and flushing the radiator didnt do anything and buying that toggle switch and running the fans constantly didnt help so I dont know what else the problem would be and i hardly believe that the temp gauge would go bad i've never seen one read the wrong temp before.



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