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post #1 of 37 (permalink) Old 05-14-2016, 05:47 PM Thread Starter
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Cooling system upgrades

Probably has been asked before... but using a phone to access the site...yields no search results for some reason...

Here goes...my 65 gal...cruising runs 210 220 according to a thermocap. Hot light will come if sitting in stop and go traffic...thermocap verified 240 degree coolant temp in the rad. My car had a 352 but now has a 390...no fan shroud...stock radiator 4 blade fan, seals around rad are good. And before you beat me up...yes I know there are the issues...but what would be your recommendations here on out besides the obvious issues at hand. You can get the temp to drop but holding the rpm up with the hood open and it drops very quickly back to 210/220. Rad inside is clean...coolant quality is good. Thermostat is working. Water pump is ok. I am looking for upgrade opinions...what has everyone done for an upgrade other than fixing the issues I mentioned. My gut tells me bigger rad and shroud. I am not completely sure if this car even had a shroud from the factory.

-mike
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post #2 of 37 (permalink) Old 05-14-2016, 08:43 PM
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Re: Cooling system upgrades

Assuming the radiator is not clogged up due to age or something I would recommend a shroud. That is the one single thing you can do for major improvement.



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post #3 of 37 (permalink) Old 05-14-2016, 09:00 PM Thread Starter
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Keep it simple stupid....just like any work I do. Fix the obvious issues and go from there. Thanks for reminding me of that. Lol. Now let me go get my helmet...this is why mechanics hate working on their own stuff...we over think the basics...

-mike
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post #4 of 37 (permalink) Old 05-15-2016, 04:00 AM
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Re: Cooling system upgrades

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Assuming the radiator is not clogged up due to age or something I would recommend a shroud. That is the one single thing you can do for major improvement.
Exactly, and see if your car has a seal/flap between radiator support and hood. You don't want hot air going forward and back through radiator.
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post #5 of 37 (permalink) Old 05-15-2016, 07:37 AM
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Re: Cooling system upgrades

Make sure there is a restriction of some kind in your heater hose. Otherwise hot water from the intake will zoom straight through, into the pump, bypassing the radiator.
4 blade fan? I thought stock was 5 blade. Is the clutch firmly engaged at idle and is the pulley the right size and the timing not retarded? Try a overflow reservoir, you can get one from autozone for ten bucks or so. Pick up a back flush T valve and some hose clamps for one dollar while you are there. Back flush frequently, run with plain water for a while, see if that helps. Clean the grime off your block and pan. If you have headers, wrap them.

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post #6 of 37 (permalink) Old 05-15-2016, 08:10 AM
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Re: Cooling system upgrades

My 460 / stock 3 core rad / hi flow puller e-fan did this all the time even when the rad was new. Finally installed a universal 2 core aluminum radiator from Jegs ($ 159 delivered) and I normally don't need the fan on while cruising. While brass is a better heat transfer material than aluminum design of the 2 core aluminum creates more surface area than the old brass design. Highly recommend the swap.
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post #7 of 37 (permalink) Old 05-15-2016, 09:46 AM
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Re: Cooling system upgrades

Hello thefordmaniac,

The stock radiator should do just fine, that is if everything is clean on the inside of the radiator, engine block/heads, water pump and the thermostat is opening all the way when it's supposed to.

This is a '66 352 and it would idle all day long and not overheat just like this. In fact it's the original '66 radiator as well as the heater core and everything is connected sans the dealer installed air con at this point and it all works just fine. There is no restrictor for the heater core. This is 100% stock setup in the picture, even running on points still. I didn't even install the fan shroud and yuppers it does come with one but it's the limp little direct drive 5 bladed fan keeping everything cool and the vacuum advance is even connected to ported vac, if connected to manifold vac it would idle even cooler.



Why this never overheats purring away at idle is because I cleaned out the block and heads by totally disassembling and cooking them for several hours at 400-425˚F. You would not believe the crap (now dry dust/dirt/scuz) that blew out of the cooling passages. The water pump was just replaced with a new one and for the radiator, whilst it looked OK from peeking into the radiator cap, I bought a few gallons of distilled vinegar and heated it up to boiling, laid the radiator flat with the cap on with the ports sticking up and filled it up with the very hot vinegar. It was a little reactive volcano as all the minerals were dissolving rapidly in the mild acid (vinegar = acetic acid). And after 15 or so minutes all the crud that came out was amazing for something that looked clean to begin with.

Had I not cleaned out decades of crud from tap water and old coolant and other contaminants this engine would probably suffer a similar fate to yours sitting at idle with a propensity to overheat.

Oh I should mention, if everything is clean and working properly, you do not need an overflow tank as its technically built into the top tank of the radiator, you are not supposed to fill these radiators to the brim. But at about halfway on full on the top tank. I didn't even get round to attaching an overflow tube (in the event it should overheat) but even with a brand new pressurized cap, not one drop of coolant ever peaked out.

Now if you want to look into a better radiator than the stock one, especially if you have air con or a high horsepower engine you might want to look at this thread. I recently bought a heavy duty 3 row high density (more columns) all new brass/copper radiator for the '66. But there are pictures for comparison against an original '66 and the new one if you would like to have a look.

http://www.fordmuscleforums.com/gala...or-sizing.html

Also if you do have air con (factory or dealer/aftermarket) you might want to consider replacing the direct drive fan with the 7 blade thermostatic coupled fan. When the clutch fully engages the fan sounds like a bloody industrial leaf sucker truck from the Midwest. It moves an amazing amount of air when fully engaged and just limps around when no cooling is required. And of course it operates in between those two extremes as well.



Some thoughts and considerations to ponder.
Cheers...
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post #8 of 37 (permalink) Old 05-15-2016, 11:36 AM
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Re: Cooling system upgrades

Quote:
Originally Posted by thefordmaniac View Post
Probably has been asked before... but using a phone to access the site...yields no search results for some reason...

Here goes...my 65 gal...cruising runs 210 220 according to a thermocap. Hot light will come if sitting in stop and go traffic...thermocap verified 240 degree coolant temp in the rad. My car had a 352 but now has a 390...no fan shroud...stock radiator 4 blade fan, seals around rad are good. And before you beat me up...yes I know there are the issues...but what would be your recommendations here on out besides the obvious issues at hand. You can get the temp to drop but holding the rpm up with the hood open and it drops very quickly back to 210/220. Rad inside is clean...coolant quality is good. Thermostat is working. Water pump is ok. I am looking for upgrade opinions...what has everyone done for an upgrade other than fixing the issues I mentioned. My gut tells me bigger rad and shroud. I am not completely sure if this car even had a shroud from the factory.

-mike
I didnt' see where anyone mentioned it, but what temp Thermostat do you run? I only ran a 180 in my 352 and never had any temp issues. No fan shroud, but I did use a fan clutch.

Jim White
Kingston, TN.
1966 Galaxie 500
460 w/ C6
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post #9 of 37 (permalink) Old 05-15-2016, 12:30 PM
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Re: Cooling system upgrades

desert, is that fan a direct replacement for stock, does it use the stock clutch, belt, etc

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Putts drives a 1965 Galaxie. Rebuilt 390, 4100 on a Performer, MX, AC, PS, PB w Scarebird front discs on Cragar 17" S/S.
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post #10 of 37 (permalink) Old 05-15-2016, 12:40 PM Thread Starter
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180 t stat. Thanks fellas! I shall investigate. Not an a/c car. Has long tube headers.
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post #11 of 37 (permalink) Old 05-15-2016, 12:41 PM Thread Starter
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Also does not have a fan clutch direct drive. Will be yanking the rad and using the heated vinegar trick or having the rad sent out.
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post #12 of 37 (permalink) Old 05-15-2016, 12:43 PM Thread Starter
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And finally yes I was mistaken it's a 5 blade sorry for all the posts not sure how to edit a post on my phone....
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post #13 of 37 (permalink) Old 05-15-2016, 01:09 PM
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Re: Cooling system upgrades

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desert, is that fan a direct replacement for stock, does it use the stock clutch, belt, etc
Hello puttster,

The 7 blade fan and thermostatic fan clutch in the last pic is the factory fan for factory air con. The clutch is a direct replacement off the original so it uses the same pulley's etc (the original clutch was starting to leak).

The other '66 that had dealer installed air con, well they changed the PS pump (offset neck), added all the brackets and idler and tensioner pulleys but left the factory direct drive 5 blade fan and shroud. Now the dealer installed air con used a Tecumseh 206 versus the York 210 for factory air con (6 cubic inches of displacement versus 10) and a much smaller condenser. With the lower cooling capacity for the under dash add on air con they clearly felt the original 5 blade fan and shroud was enough.

Cheers!
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post #14 of 37 (permalink) Old 05-17-2016, 04:48 PM Thread Starter
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Re: Cooling system upgrades

Actually it's a 4 blade fan in there...weird... anyway...last night pulled the rad used the hot vinegar trick....and wow...lots of nastiness. Back together last night didnt have a chance to burp her. Home from work and burped and fixed a loose header flange to pipe bolt... Currently has been idling for almost 30 Mins and hasn't crept over 190. Success let's hope so...granted it just got done raining and it's pleasant outside...onto fabbing up a fan shroud!!

-mike
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post #15 of 37 (permalink) Old 05-18-2016, 09:16 AM
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Re: Cooling system upgrades

Sounds like your on your way to a dependable ride. I think the shroud will be the last piece of the puzzle. As Mentioned by another poster, you may want to check your thermostat.



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