Jesse Boggess

Got back on the road yesterday, and damn...what a beast my 4 month project has turned into. It does seem to be running hot even after buying a new radiator. It is a rebuilt 78 Sbc 350 with comp cam, edelbrock carb and intake, so not a whole lot. I had to reroute my serpentine setup and bought a new ccw Waterpump...thinking that could be the culprit. And suggestions? Thermostat is 180*.

1988GTA500HP

What temp fan switch?

Jesse Boggess

The fan is to a manual fan switch that I leave on at all times.

1988GTA500HP

With a 180 stat and fan running all the time it should stay cooler than that. Possible air in the line or underpowered fan. Did you bleed the air out when you filled the antifreeze? What is your antifreeze temperature set at? I'm no expert but these things are low lying fruit.

1988GTA500HP

Also check your air dam. Is it damaged or missing?

Jesse Boggess

Fan is working ans may be under powered but even when rolling at 60 mph it doesn't make a difference. I have bled the cooling system more than once just to make sure. Is there the chance that my block may be less efficient with coolant flow with a ccw waterpump? And I know for a fact 100% it is ccw.

1988GTA500HP

So the flat side of your belt goes over the water pump?

Jesse Boggess

Got my alternator on top left, power steering on right. The belt its routed in a "v" shaped with the flat side going underneath the Waterpump pully. I am missing an air damn.

1988GTA500HP

Most likely your problem, especially if hot at speed.

https://www.thirdgen.org/forums/cool...am-effect.html

Jesse Boggess

I agree, it would help but even at idle its running 230*.

1988GTA500HP

Do you know the cfm of the fan?

TTOP350

iTrader: (8)

Do yo have a single fan or dual fans?
If you have all your ducks in a row check for a weak fan motor or a alt thats low on amps. I think dual fan cars use a 105 amp.
also do u have underdrives or stock pullys?
It doesn't matter to the motor which way your pump spins but it does matter how you route the belt for the pump you use.
Like I said it doesnt matter but It sounds like you should be using a standard rotation pump with the accessory drive you have. Could you post a pic of it so we can see what you have going on?

1988GTA500HP

Thanks for jumping in TTop, I was starting to get in over my head. Still think the airdam at speed is a problem and guessing an underpowered fan at idle, assuming he has his belt run correctly.

Jesse Boggess

here's a few photos of my setup. it's single fan, considering getting dual..if anything it'd help but I doubt it will keep it cool enough.

1988GTA500HP

I'll let TTop help you with it since he has more knowledge than me but I have never seen a water pump with so little belt contact. Wouldn't surprise me if it's slipping. And shouldn't you have a belt tensioner in there?

Jesse Boggess

That is true, not much contact but the belt its tight enough. There is no slippage when pushing the throttle. I have not been able to put a tensionor on it. That's on the to do list. Thanks or all your recommendations so far bud.

1988GTA500HP

No problem. Wish I could have helped more. And I would do the air dam as soon as possible. Some people make their own. You could do a search on it to see how.

TreeFiddy

Ccw water pump is correct for that belt setup.

Get a full shroud around that fan. There's little airflow across the core that's not covered by the fan, so you're really only using about half of your rad. Plus it's probably recirculating some hot air around the sides, rather than drawing 100% thru the core.

Or go dual fans, but same thing applies with the shroud.

TTOP350

iTrader: (8)

It should be ok the way its setup, not the best but should work ok.
Have you checked your timing and if the car is running lean or not?

Jesse Boggess

The timing is set at 12*. About as close as I can get to without it pinging to be safe. Everything is dead on except for the temp. I will be getting dual fans from a buddy later today and let you guys know how that helps out. Another thing that came to mind...since I put in a 78 appropriate temperature sensor...would that be giving a faulty reading with the 92's temp gauge? Thank you all for the suggestions so far! So stoked to be a third gen owner!

TTOP350

iTrader: (8)

That might have a different reading than our stock ones? I'm not 100% sure.
Have you run a temp laser on your parts to check the "real" temps?? These senders and gauges are not always the best..

Jesse Boggess

I'll look into that also.

Jesse Boggess

Made my own shroud to see if it would make a difference, and it has had much of an affect. Will be purchasing dual fans this evening. Hopefully will be able to fab an air damn also.

1988GTA500HP

Good job! Post pics when you can.

DJP87Z28

No air dam is your problem....