Overheating problem - Team Camaro Tech
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post #1 of 13 (permalink) Old Jul 4th, 17, 03:27 PM Thread Starter
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Brad
 
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Overheating problem

A friend of mine installed a 1977 L48 350 engine from a Corvette into his car recently. He took off the cast iron intake manifold and installed an Edelbrock Performer 2101 in its place. Ever since he started driving the car it has been getting very hot. Would there be any reason that this manifold wouldn't work on this engine? It has the stock cast iron heads on it.
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post #2 of 13 (permalink) Old Jul 4th, 17, 04:36 PM
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Re: Overheating problem

Did you replace the thermostat. What is very hot?
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post #3 of 13 (permalink) Old Jul 4th, 17, 04:56 PM
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Re: Overheating problem

A LOT more information would be neded to accurately diagnose the over heating issues, timing curves, settings, carb, what has been done to mess up the cooling system, etc.
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post #4 of 13 (permalink) Old Jul 4th, 17, 07:51 PM Thread Starter
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Re: Overheating problem

Quote:
Originally Posted by 69&76 View Post
Did you replace the thermostat. What is very hot?
He had a new 160 thermostat. He removed it and still got hot (240 on the gauge).
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post #5 of 13 (permalink) Old Jul 4th, 17, 08:02 PM Thread Starter
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Re: Overheating problem

Quote:
Originally Posted by dave ray View Post
A LOT more information would be neded to accurately diagnose the over heating issues, timing curves, settings, carb, what has been done to mess up the cooling system, etc.
Right now we are trying to eliminate the intake manifold as the source of the problem. An Edelbrock Performer 2101 should fit this engine with stock heads, correct? If it is supposed to work then we will have to try and find other issues. If timing is the issue, would advanced or retarded timing be the culprit?
He also bought a new aluminum radiator thinking that might be the problem and it made no difference.

He says it runs very well except for the overheating. One of my suggestions was that maybe the '77 temp sending unit isn't playing well with his '65 gauge. Could this be giving a false reading? It is a new sending unit.
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post #6 of 13 (permalink) Old Jul 5th, 17, 03:15 AM
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Re: Overheating problem

did he drive the car before he removed the intake? did it run ok ?
or is a salvage engine he bought not knowing anything about it
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post #7 of 13 (permalink) Old Jul 5th, 17, 05:45 PM Thread Starter
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Re: Overheating problem

Quote:
Originally Posted by flat tire View Post
did he drive the car before he removed the intake? did it run ok ?
or is a salvage engine he bought not knowing anything about it
We pulled it out of the car it originally came in and it ran fine before removal. No overheating or any other issues. It was only removed to replace with a high performance 350 otherwise it was fine.
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post #8 of 13 (permalink) Old Jul 11th, 17, 06:42 AM
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Re: Overheating problem

Remove the manifold, inspect everything and then reinstall it. Get the garden hose and flush the block and radiator, check the timing too, use new gaskets . If all you said is true then the problem lies with the installer.

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post #9 of 13 (permalink) Old Jul 11th, 17, 08:33 AM
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Re: Overheating problem

Was the radiator and shroud transplanted along with the engine? Sounds like maybe the vehicles existing cooling system is not up to the task. What engine combination did he rip out of his Camaro to transplant this Corvette engine?


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post #10 of 13 (permalink) Old Jul 12th, 17, 06:22 PM
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Re: Overheating problem

Not too informed on big blocks, but I know on the small blocks if you put the wrong or no restricter plate on the intake manifold gasket allowing water through the intakes cross-flow,, the engine will over heat.
The water goes into to a loop around the heads and back to the water pump with very little getting to the radiator.

I left these little silver tabs (centered in photo) out of my 302 and when I was 20yo and had chronic overheating until I put them back in.
Some SB's need both restricter plates installed, others only one side. Check your repair manual.

Hope this helps.
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post #11 of 13 (permalink) Old Nov 27th, 17, 11:57 AM
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Re: Overheating problem

If the temp sender is electric, make sure you didn't wrap teflon tape on the threads. The sensor needs a ground through the threads if it's a one terminal type.

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post #12 of 13 (permalink) Old Nov 27th, 17, 05:49 PM
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Re: Overheating problem

Quote:
Originally Posted by Cortez69Z28nut View Post
Not too informed on big blocks, but I know on the small blocks if you put the wrong or no restricter plate on the intake manifold gasket allowing water through the intakes cross-flow,, the engine will over heat.
The water goes into to a loop around the heads and back to the water pump with very little getting to the radiator.

I left these little silver tabs (centered in photo) out of my 302 and when I was 20yo and had chronic overheating until I put them back in.
Some SB's need both restricter plates installed, others only one side. Check your repair manual.

Hope this helps.
Those “silver tabs” are for the heat crossover. They have nothing to do with coolant.

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post #13 of 13 (permalink) Old Nov 28th, 17, 05:38 PM
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Re: Overheating problem

Now, for information to help solve this issue

How is the cooling system set up? What shroud, fan setup, radiator, water pump, coolant and ratio to water, what type water, tap, distilled, mineral starved, thermostat, pulley drive ratios?

How is the ignition set up, initial, curve, vacuum advance, sourced from?

We need to know what set ups the thing has.
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