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Discussion Starter #1
A customer brought his '69 Camaro in and wanted to be able to drive it reliably. It over heated quite a bit. The engine combination was very wrong, but it ran pretty good, so I just came up with a cooling system that would handle anything.

I put the biggest aluminum radiator they make for GM in there. I had to fabricate a cradle and top clap like the newer cars have. I also fabricated a fan shroud for it. It turned out nice. I wanted a non car person to believe that this is how the car came. The amount of work to put a radiator this big in a '69 Camaro is unbelievable. I think I pulled it off though.







And just in case you see '69 Camaro and wonder if it's my work, ...look for this stamp in the top clamp.

 

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Discussion Starter #3
Except the stock system WASN'T fine. It had the factory small 3 core, fan shroud and six blade flex fan. I back flushed the cooling system, replaced the t-stat with a 180 and got the proper mix of coolant and water. It would run at 190 for about 5 minutes, then slowly climb to over 220 then up to 240.

I'm guessing from the exhaust pulse that compression is somewhere in the 12:1 range and it's probably bored too. This guy has owned the car for 15 years and has never been able to drive it very far. The temp stays around 180-190 now. Maybe in a few years, we'll worry about changing the combination. I put the bug in his ear about it already so he has it in the back of his mind.
 

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The work you did is commendable but way over kill! There is something driving the heat, some of it may be the high compression but not enough that a stock rad in good condition with the proper fan couldn't handle. A bad tune, timing, wrong plugs etc and even the waterpump or an obstruction in the block, something is creating excessive heat.

That 6 blade flex fan may even have a lot to do with it. Flex fans flatten out at rpm and restrict the air through the radiator!
 

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Discussion Starter #5
It's not the timing, tune, spark plugs, block restriction or water pump. I checked all the usual suspects. When I back flushed the system, I used a flush solvent and didn't stop until the water ran crystal clear. The pump was pumping water like a champ. Something internal with the combination is most likely the culprit. Yes, I agree. What I did was overkill, but now if and when we change the engine combination, (or go to a big block) nothing will have to be done to the cooling system.

Besides, after a couple/few decades of doing this, if a customer brings in his car because it's overheating, the last thing he wants to hear is, "The engine is not put together well. We need to build a new engine that won't overheat." Even though that is most likely the case, it's hard to convince a layman of that. That's a sure way to scare him off and into the hands of another garage that really has no clue what they're doing with a car like this. Been there, done that too many times to mention. Then they bring the car back so I can fix what the other guy did, AND the original problem.
 

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Very nice work!
 

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That shroud is very impressive, Wow!! Looks great! :thumbsup:
 
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