Overheating I think it's the Rad. - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
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post #1 of 13 (permalink) Old Jun 5th, 02, 12:56 PM Thread Starter
 
Join Date: Oct 2001
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O.K. I put a new Rad on my car from autozone. It's a 3 row Copper and now it seems to run hot. I changed the water pump, then the thermostat. I put a 160 but the stinking think runs 190-210. Thats the second 160 I've bolted on. I also got a heavy duty fan cluth on it. I'll exchange it today for another one to see if it will help any. When I turn on the A/C forget it jumps to 230 and more. Do you think I got a Rad that has some lines pluged up?

305ci, Holley 750cfm, gets hot on expressway with AC off, gets hot at idle with AC on. Has original fan shroud, temp would be what thermostat said 160,190 ect.

[This message has been edited by 4U 2 NV (edited 06-06-2002).]
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post #2 of 13 (permalink) Old Jun 5th, 02, 04:01 PM
 
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What temp before new rad.? What engine ?
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post #3 of 13 (permalink) Old Jun 5th, 02, 04:59 PM
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Matt Jones
 
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You didn't mention if you had a fan shroud or not. Do you have one?

Did you make sure there was no air in the system?

------------------
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post #4 of 13 (permalink) Old Jun 5th, 02, 05:19 PM
 
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Does it run hot at high or low speeds ?? What carb. are you using ??
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post #5 of 13 (permalink) Old Jun 5th, 02, 11:59 PM
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The guys here are asking some pertinent questions about your situation.

First, does it overheat at idle/slow speeds or highway cruise or both. This is a biggy whereas if it's only at slow speeds the airflow thru the radiator is the issue.

Airflow will depend on fan size and pitch, shround design and placement.

Go to www.inccn.net/techforum.htm for more on cooling.

------------------
STEVE JACK
ConceptOne Pulleys and Brackets
Techical forum/links at www.inccn.net/techforum.htm

[This message has been edited by HOTRODSRJ (edited 06-06-2002).]
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post #6 of 13 (permalink) Old Jun 6th, 02, 02:58 AM
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The Rad needto be installed in you car!! Thats the problem. If its on your car It will surely damage the finish as well

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post #7 of 13 (permalink) Old Jun 6th, 02, 03:49 AM
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a 160 thermostat will not work unless the radiator can keep the engine that cool
160 is just the temp at which the stat will open
if the rad. can only keep the engine at 195 then the 160 stat will always be open
i run my 350 at 190-200 and it runs the best there (i have a 3 core radiator from auto zone....but it is for a 350)
however the 230* would worry me too
souds like you have an airflow issue as mentioned above
i would just stick with a 180 or a 195 stat.(whatever you have stock)
good luck
Nate
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post #8 of 13 (permalink) Old Jun 6th, 02, 05:55 AM Thread Starter
 
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I am going to install an electric fan to see if it would help any. It's going to be an aux electric fan. It would probably work fine by itself when the AC is off, but if the clutch fan can't keep it cool with the AC on I doubt the electic fan can keep it cool either. Maybe I'll switch the Rad for another one too. I'll keep you posted.
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post #9 of 13 (permalink) Old Jun 6th, 02, 06:24 AM
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What kind of car do you have?

Is there supposed to be a spoiler? Did you remove anything that you might have thrown away, thinking that it was good for nothing, and taking up space? Do you have the proper sending unit for your temp gauge?


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post #10 of 13 (permalink) Old Jun 6th, 02, 08:22 AM Thread Starter
 
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It's a 1979 Model with a Holley 750 Vacuum Secondaires.
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post #11 of 13 (permalink) Old Jun 6th, 02, 09:32 AM
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Once I went through 4 or 5 clutch fans before I got a good one from that place that has the three stooges statue out front.

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post #12 of 13 (permalink) Old Jun 10th, 02, 10:34 AM Thread Starter
 
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Well I took out the old Radiator and put in a new one (it has a lifetime warranty) and now with the AC On and stop and go driving and on the expressway it stays at 190-210. Not bad. I put the fan clutch back on, and need to fabricate some brackets to mount the aux electric fan.
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post #13 of 13 (permalink) Old Jun 10th, 02, 02:59 PM
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If your car is heating up cruising at speed, it's likely that the carb is too lean or the airflow is disturbed in some way. You should not use any fan at speed...the radiator should have enough flow to be efficient enough to run without.

The critical components to cooling are radiator area, coolant flow, airflow, water content, and turbulence within the radiator, in that order.

------------------
STEVE JACK
ConceptOne Pulleys and Brackets
Techical forum/links at www.inccn.net/techforum.htm
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