#1
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Getting Hot
I need some help.
I have a 67 chevelle 300 2 door sedan with a air conditioned 396 that i am have some over heating problems with. It all started after i had my carb and dist overhauled, it started running a little warmer that normal so i dropped the thermostat to a 180 and put a fan blade extension in to move the fan closer to the radiator helped a little. I thought if i put a aluminum radiator in that would solve some of the problem and look good did not work tem actually went up from 180 to 190/210 idle would come down when moving, dropped a 165 thermostat in temp went to 185/190 idel sometimes it would creep up to 210 if i had to sit longer or turn the ac on it would really run up. I bought a pair od 12" fans and shroud and things really went wrong the temp went to 210/220 idel and 220/230 crusing no ac take fans off it runs 220/230 crusing scary with aluminum heads. This is a three row aluminum radiator, i have bought new spal fans waiting to install if i can figure out why the radiator won't even cool without fans on. I went bach to stock fan and shroud and it runs 220/230 help |
#2
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What a lot of people overlook is fuel and timing. You said right after carb and timing work, it started to heat up. What exactly did you do? If the timing is too far advanced it will cause heat and if your engine is running too lean, it can create A LOT of heat. Fuel as a liquid helps cool the heads down. Check these two things and see what you find.
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Alan 1964 Chevelle SS Speed's expensive, how fast do you want to go? |
#3
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Alan, I am one of these "a lot of people" who had overlooked the fuel and timing as a cause for heat build up. Thanks for bringing it back to the fore front.
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Get in, sit down, shut up, hold on...cause Ms Grumpy is driving ! For the audio geek try: www.audiokarma.org |
#4
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I have the same problem with my 454. All stock original motor. My norm is 210 degrees and heats up to 230-235 at light. New therm, fan clutch, hoses.mstill same
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#5
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Just a quick question here. What is the "best/correct" temperature for a motor to run. The reason that I am asking is that I had an temperature problem on my way down to the Ohio show a few weeks back. In talking to many knowledgeable people I was told that it is not unusual for a motor to run 230, and in some instances it is almost better for the motor to run at a higher temperature.
So which is it ? Is a low temp (and what is that low temp) better for the motor, or is a higher temp (and how high really should it go) better for the motor.
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Get in, sit down, shut up, hold on...cause Ms Grumpy is driving ! For the audio geek try: www.audiokarma.org |
#6
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Quote:
If you have a 180* thermostat and run 200 or above your cooling system may be a little weak but you're not running in the danger zone. These 40 year old cars didn't have the air dams, etc like newer cars that keep engine temps more consistent. Most newer cars run a coolant temp in the 190-200 range. They seldom go above that because of the improved design of the cooling system and air flow. |
#7
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Great explanation. Thanks Hank.
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Get in, sit down, shut up, hold on...cause Ms Grumpy is driving ! For the audio geek try: www.audiokarma.org |
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