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Cooling Systems, Radiators, Fans / A/C
Engine Cooling Systems, Radiators, Fans / Shrouds, water pumps, anything cooling related. Air conditioning etc.
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Old 04-24-2017, 09:26 PM   #31
zbad55
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Eric, here is another thing that you can check. Make sure that you do not have a reverse flow/rotation water pump on the car. When I first built mine and installed the Long Chevy water pump I was having similar issues. Then a friend mentioned the possibility of the reverse flow/rotation. When I checked the back of the mounting hub on the pump it was stamped with a "R" which meant reverse flow/rotation. Just another thing for you to check,
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Old 04-25-2017, 07:56 AM   #32
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Check to make sure your lower radiator hose isn't collapsing. A weak/soft hose without an inner support spring may not collapse at idle, but it might at sustained higher rpm.
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Old 05-01-2017, 12:10 PM   #33
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Im about to make the same thing. Move the rad to 6cyl position and install shroud with electric fan. Tired of going hot when cruising (engine and rad are good and not clogged)
I guess that I just remove the hood support brace? Thanks all

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Old 05-01-2017, 12:12 PM   #34
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Tried a better fan but it interfered with the radiator. There is really no space left

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Old 05-19-2017, 02:29 AM   #35
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Quote:
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Eric, here is another thing that you can check. Make sure that you do not have a reverse flow/rotation water pump on the car. When I first built mine and installed the Long Chevy water pump I was having similar issues. Then a friend mentioned the possibility of the reverse flow/rotation. When I checked the back of the mounting hub on the pump it was stamped with a "R" which meant reverse flow/rotation. Just another thing for you to check,
Good point! I had that happen with a fan on my 65 Chevy Truck....put the wrong rotation on the fan and found out pretty quick that it didn't work. I would be shocked if this were the case on the pump here, but I'll check. Since my engine is more like a '72 Chevy 350, Im not sure if I need a R rotation or not.....but I will check rotation before I bring the pump to Pep Boys for a replacement.

I did notice today that I can remove the back plate on my pump which I can't wait to do and see what that impeller is looking like. If it's not in bad shape, I surely will be scratching my head.

Currently I have the engine running with no thermastat and it's running much much cooler, but still climbs to about 200 when at idle. I would sure love to see it never get over 190....am I dreaming?
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Old 05-19-2017, 02:30 AM   #36
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Check to make sure your lower radiator hose isn't collapsing. A weak/soft hose without an inner support spring may not collapse at idle, but it might at sustained higher rpm.
Thanks.....I just replaced both upper and lower hoses, and highly doubt that's the case, but good thinking.
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Old 05-19-2017, 02:32 AM   #37
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Im about to make the same thing. Move the rad to 6cyl position and install shroud with electric fan. Tired of going hot when cruising (engine and rad are good and not clogged)
I guess that I just remove the hood support brace? Thanks all

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My 65 Chevy Pickup looked similar and I completely fixed the heating problem by just installing a shroud....same fan connected to the water pump.....never runs hot.

Good luck with yours.....I think a shroud will solve your problems.

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Old 05-19-2017, 01:37 PM   #38
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I have a pusher fan mounted in front of ac condenser. Fan is on all the time and car barely gets to 150. It does have a Griffin aluminum radiator in the V8 position with a shroud, no room for a pulley driven fan. I'm going to install a temp controlled relay to see if I can get the operating temp up to 180. Engine is a 430hp crate engine from the early 2000's (ZZ430). I will probably replace the whole front end with a serpentine system and move the radiator to the six cylinder position as soon as I win the lottery!
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Old 05-20-2017, 12:31 AM   #39
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Water pump off and exposed to inspect. Let me know what you think of these pictures and the condition of the pump. Im gonna change it tomorrow anyway, but would appreciate opinions.

Thanks

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File Type: jpg Water Pump 1.jpg (654.3 KB, 31 views)
File Type: jpg Water Pump 2.jpg (654.4 KB, 35 views)
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Old 05-21-2017, 02:16 AM   #40
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This is bullshit. New water pump, new thermostat and same shit! No change and the car is still overheating 240! I'm gonna take it for a pressurized flush and see if something gives. I had flushed it forwards and backwards with my garden hose under pressure and seemed fine.

If you've been following, I have replaced new radiator, water pump, hoses, fan, shroud.....someone please tell me what the heck this could be?

Regular rotation etc.....

And the car doesn't heat up right away either. Seemed like for 10 minutes, 3 miles all was so-so but she slowly creeps up and then there's no getting her back down. Fan is working the right direction. I'm freaking missing something!
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