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Old 06-26-2004, 12:03 AM
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Cooling Problem for SBC 350 PLZ help!!

hi everyone. i just put a new top end on my sbc in my 67 camaro. i finally got it running correctly but it will only run perfect if it is between 195-210 degrees. im not sure if that is a good running temp or not, but the problem i am having with it is that when it is not hot outside i cant get it to heat up to that temp and when it IS hot outside it seems like it will overheat if i am stuck in traffic too long. i have a stock 3-row radiator with a fan shroud and a 17" flex fan. and i have a 180 thermostat in it.

please give me any suggestions on what radiator/fan/thermostat setup would work best to keep my car between 195 and 210 no matter what the weather is outside.

thanks!!

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Old 06-26-2004, 12:15 AM
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Have you checked the fuel mixture to assure it`s not too lean? is the vacuum advance connected to a manifold source?
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Old 06-26-2004, 01:16 AM
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i have a 600cfm carb on it and it seems to be running rich enough. i have the advance hooked up to the front of the carb on the port that edelbrock specifies to put the advance on. would it be better on a manifold port?
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Old 06-26-2004, 04:15 AM
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Overheat

[color=lightblue]Doc here:

As far as the Cooling system, sounds like your doing everything right, Have you tried a flush / Back flush of the system maybe there is some leftover trash from the top end job plugging things up, then refill with the right mixture of Anti Freeze? Purge the Air from the system....Maybe a Check of the pressure Cap too...

Too Lean might be a clue too...Don't you guy's Have Some altitude in diffrent locations in Nevada? Maybe what should be right might be too lean..

Are You Sure the Gauge isn't running a scam on ya'? Is it REALLY hot / cold... using water?

Maybe a bad thermostat ? Sometimes Even new, you can get 2 or 3 bad ones , and the ever Popular "Doc~isim"... It's The right side up, right?

As far as the advance, If it's on a ported Vacuum Source It Should be "All Good" ... If recomended that's where it should probably be..

Doc
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Old 06-26-2004, 10:16 AM
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if you want it to run at 195, put in a 195 t-stat. that simple. it may get hotter than 195, but it won't be cooler. though I do agree with doc in that you should check to make sure the gauge is correct.
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Old 07-26-2005, 06:40 PM
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cooling problem with 350 sbc..

Can't say it won't hurt but might help. Try replacing the flex fan with a normal five or six blade solid fan. It moves more air..cools a couple degrees.
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Old 04-07-2010, 12:28 AM
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Make sure you fan is not too far into the shroud.

Don't know what you're using for coolant, but during the summer, I use only water, Water Wetter and Zerex water pump lubricant and anti-corrosion treatment and also added a bung to the radiator to screw in a zinc anode (I get from the boat supply store -- also a good source for stainless fasteners and high-grade electrical components) to reduce corrosion. You have to run anti-freeze in the winter, but anti-freeze reduces the efficiency of the coolant
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