Does this sound like an overheating problem?

[68HoosierCoupe]

Thanks! I have been looking around. It would appear that the flex fan isn't quite centered on the radiator, I'll have to check, but by eyeball it looked to be off center by an inch or a tad more. I may have some adapting to do?

 

[68HoosierCoupe]

I hadn't thought about that....using a seperate trans cooler. I would like to think that the trans fluid is not partially or fully to blame for the higher temps at a crawl.

The radiator is supposed to be from a 69 Mustang, so if I cannot make one fit I have a great metal guy at the locomotive shop, or, as Spyke was thinking, I could go electric.

I realize a few of you have given Spyke a lot of good advice, I have spent several hours looking back at the threads about this car and haven't finished them yet. Thanks to all!

 

[BIGREDRASA]

I'll bet Spyke feels like a proud poppa.

 

[Anonymous]

I now own this car, and this is still something to iron out. I did notice that when the car is running at temperature, the output from the heater is nowhere near what I would expect.

My question is why would a heater core cause overheating problems? A quick look at the setup, I followed the routing of the hoses to the heater core, and didn't notice any control valve/bypass valve. I have been away from Mustangs too long, but I thought there was normally something to control the flow of coolant to the core?

At any rate, the car runs cool at speed, and gets a little hotter in stop and go traffic (in 60 degree weather). Spyke recommended a small manually-switched electric fan, but I may go with full electric fan & controls and remove the flex fan.

Does it still have the 2 row radiator?

Even though it is new I would swap in a 3 row radiator in its place. Thats what my 200 has now. Especially since yours is a 250.

Redline water wetter might help a bit as would a 160 thermastat. Heater core will have nothing to do with the temp the engine runs at.

I suspect that your heater (as Slade says) either needs a new heater core or the heater box itself rebuilt which you will do when you replace the core. You can get all the gaskets and such from national Parts Depot.

Look in Summit racings online catalog. I beleive they have some generic fan shrouds and you will find your best prices for electric fans.

Later,

Doug

 

[Williboy]

On my '61 Ranchero I had the strap off the cross brace, I replaced it with a section of heater hose split in half. Keeps the hoses up nice-n-neat.

I would check and repair the heater core, it's part of the coolant flow and everybit helps and also it's better to fix it now than in middle of winter when you have to.

As for the fan shroud, my fan is also off-center. I used a cheap Mustang shroud. I just cut it in half, then over lapped the sections to where it would work, and then pop riveted it back together. On one side I cut and used a piece of thin flat stock to hold it together. They sell different fan shroud brackets depending on the thickness of the radiator.

 

[66200i6]

That, is a good idea. Very handy, Williboy.

I've never turned down a good idea, Thanks.

Did you have to adjust your fan blade positon relitive to the fan shroud?

Ric.

 

[BUZZ]

I was working in my garden today and spent a lot of time thinking about this topic. So I popped a few hoods around my yard and did a bit of looking, I maybe way off on this but just looking at the fans on a few of my cars it appears that they have a bit more pitch than a normal V8 fan or a flex fan. I also measured from the tip of the blade to the rad and the furthest one away only measured 1". It makes wonder if the flex fan is just not pulling enough air, because of one of these two reasons?

 

[BIGREDRASA]

IMHO, flex fans don't pull as much air. They're meant to save gas/horsepower. I would have preferred a clutch fan, if I had found one to fit.

 

[68HoosierCoupe]

I measured several items after reading the new posts to this thread, and here is what I found:

The fan is offset about 1-1/4" to the passenger side, measuring center of fan to center of radiator. (in regards to the shroud/flex fan etc discussion)

The flex fan is 1 inch from the radiator at the closest point.

The car runs very cool except when in traffic. Last night, traffic was heavy going to see the new Indiana Jones move, and the temp got up to about 220 or so. The temp dropped quickly once I got past the traffic jam, it was a cool evening, maybe 57 degrees.

 

[64falconsix]

i went with a three core radiator in my 64 falcon. along with the double groove balancer there was not room for a fan. tried stock with various spacers and low profile flex fan it either hit the radiator or balancer. i'm getting ready to put in a 16" electric pusher fan from spal usa it's only 2.05" thick and will fit in front of the radiator with no clearance issues. check out their web site. www.spalusa.com

 

[addo]

The last car I had heat problems like that in, had poor ring seal and resultant low compression. Have the rings bedded correctly? Can you perform a compression test to verify?

 

[68HoosierCoupe]

I can do that in the next few days!

 

[Bort62]

Overheating in traffic with a flex fan 1" from the radiator and no shroud?

Not surprising at all. Flex fans are pretty lousy in general. I would seriously recommend switching to an electric fan.