OK here we are again Its 91-92 right now in Portland. New rad ( 2 row 1" tubes all aluminum and LOL no room for electric fan LOL
So with the stock 4 blade 1" from rad  we went for a drive. 180-175 in town to the freeway (2 miles) after car was warmed up and checked for leaks. 10 miles at 65MPH without AC it stayed at 180. Got off parked and checked for leaks again left running temp went up to 200. Back on freeway home temp droped back to 180 so on went the AC. We never got over 185 till I got off the freeway and temp started to go up so at 200 off went the AC temp started to fall and I was home.
Stock 4 blade and no shroud.  I need a better steel fan and have a nice electric for sale 

This sucks installed new 7 blade fan temp is all over. 160-210. I can’t believe that with this rad it worked for one day with a 4 blade stock fan on hiway in 91 degrees just wouldn’t cool in stop go.  Could a new start 180 stat stick open and then maybe closed. When I stoped and shut it off at 210 the upper hose was hard.  And yes I have a spring in the new lower.    Really bummed

Last edited by Cab4word67 (7/27/2019 7:30 PM)

351MooseStang wrote:

I would put the four blade back on and run it for a few days to make sure that you get the same results you did when you first ran it, then proceed. If by SS fan you mean the flex fan type, ditch it and run a fan/clutch combo. The flex fans flatten out too quickly and draw less air as the fan speed increases. At times the engine needs additional cooling at speed and with that fan it's not there. It's worse with a shroud as they flatten out they restrict air flow through the shroud at high speeds.

If you're not going a good electric fan, the fan/clutch combo is best.

100% agree with this. 
 

OK OK OK I have listened again,
Just ordered clutch fan, and a steel fan and shroud. Will take back SS flex crap this week. And put electric on E bay.  But we did get to drive the car with the AC after fixing the T stat, we just stayed on the highway.  Does anyone have a good recomendation for a 180 stat?

What was the LAST thing, if any, you did to the engine/cooling system before experiencing this cooling issue?

How many times has the cooling system puked its guts on the ground or into an overflow tank?

How are you accurately determining the temperature?  Stock gauge, aftermarket gauge, laser, educated guess?

What AC system are you using? 

The only thing I did is add Vintage are to a old stock 2 core. I added a new 2 core 1" tubes Champion alunimun and I use a laser and a new mech gauge mounted in the intake for temp readings. I have had no shroud. In one week we will have new stock shroud and new thermo clutch with 6 blade steel fan. I think we will work as we drove home from mountain with AC on and only went up 5 deg per trific light got to 205 and cleared all the lights and down came temp. big problem now is wont cool at idle/stop in go. Stat has hole  and cant wait for shroud and new fan. All other junk is gone

Last edited by Cab4word67 (8/05/2019 10:24 PM)

Hi there eveyone. I didnt think I would ever be back and maybe I 'm not and just think I am. here is the update one the cooling problems. We are now running a 2 row aluminim Champion radiator w/1" tubes. I have installed a thermo clutch 6 blade steel fan and a new stock (crap) metal mustang shroud that I had to fill in the top and bottom for it to work. Will make new custom one this winter. The car seems to maintain170-185 now with no AC in 80 deg temps. I installed a new MotoRad 180 stat. it does seam to slowly creap up to and mybe past 190 sitting in the driveway. I think we are finily cooling the old girl. We drove all over town with the AC on with no temps past 190. I will watch it and try to enjoy the car for summer now. Thank you all for the input, and for anyone new out there like me Trust these guys with what they say.
PS it drives sweet now too with the Arney drop

Great news butt.............Temps in Oregon(80 on a hot day!)  vs Texas and southeast coast is about as far aprt as......Oregon and SC!!  Jus say'in!!
Heat index of 104* on the coast today....again!
Glad you got yours sorted out. Nothing worser(is that a word? ) than going for a nice cruise with one eye on the temp gauge and one on the speedometer.... and one on the tach and one on the cell phone clowns!
6s6

Today in DFW would be a good day for testing cooling systems: 104 on the thermometer (in the shade). I won’t be doing anything outside until the sun goes over the yardarm.

Last edited by Hornman (8/11/2019 12:16 PM)

Hornman wrote:

Today in DFW would be a good day for testing cooling systems: 104 on the thermometer (in the shade). I won’t be doing anything outside until the sun goes over the yardarm.

Yes I'll say Did brave the heat and took my girl for a hot test ride ...
after adjusting carb - 
18 # rad cap -
set initial timing at 18 *  .. was getting Mac Add 25* @ 1500 rpm / 30* @ 2500 rpm / 38* @ 3500 rpm 

Took it out about 11: am  without hooking Vacuum Add .... 
RAD temp 185 * on hwy @ 1500 rpm - 70 mph 
 temp  on Hwy @ 2500 rpm  - 70 mph  rose to 200* 

?? should I curve Dist to total Mac..Add of 20 * to come in at 2500 rpm ??? 
 then hook up Vacuum ( and how much ? ) 
 

Sorry 
Mechanical Advance  ( my attempt of shorthand )

Cool!  😎