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39 ford flathead overheating
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kensoncustom
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May 17, 2012, 1:46 PM
Post #1 of 15
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39 ford flathead overheating
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i have a 39 ford fresh rebuilt flathead engine runs great 15 mi starts to run hot230 240 degrees puks out overflow tube.
any hints would be helpful thanks
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 17, 2012, 2:29 PM
Post #2 of 15
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Re: 39 ford flathead overheating
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I go back a long way with stuff and this doesn't make sense. Radiator needs to be known good. Need to touch and feel without burning yourself where engine heat is and should be going and if those things are proper.
This will or should take some overheating without wild damage but don't push it,
T
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kensoncustom
User
May 17, 2012, 5:55 PM
Post #3 of 15
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Re: 39 ford flathead overheating
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new aluminum radiator water pumps are new.going to check flow head,block and radiator temps in morning
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Discretesignals
Ultimate Carjunky
/ Moderator
May 17, 2012, 6:03 PM
Post #4 of 15
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Re: 39 ford flathead overheating
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Did you check for trouble codes? Is the ECM turning on the cooling fan?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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nickwarner
Veteran
/ Moderator
May 17, 2012, 6:21 PM
Post #5 of 15
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Re: 39 ford flathead overheating
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DS buddy, I think you need to have a day to relax. This was made in 39 and we were still using the abacus instead of a calculator.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 18, 2012, 7:01 AM
Post #6 of 15
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Re: 39 ford flathead overheating
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Kaboom! Laugh my Azz Off!
Tom
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kensoncustom
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May 18, 2012, 10:51 AM
Post #7 of 15
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Re: 39 ford flathead overheating
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i am gona take that as you were joking? i hope.will have more info soon thanks for help
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 18, 2012, 4:21 PM
Post #8 of 15
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Re: 39 ford flathead overheating
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Just know we are all volunteers, site is free and yes the regulars know each other somewhat and we do play some and joke around. Can and will be as serious about a problem as the web can do which is still limited.
A 1939 anything vehicle was originally made with a radiator and cooling system that could be worked on. Any alterations of that are going to be in the mix now and apparently there are some.
If and apparently is overheating then you just have to find where the heat goes or doesn't in this case. It's so old it is beyond me but not all here. May have fan(s) backwards or slim chance that water pump(s) are for marine and spin the wrong way - silly stuff like that comes into play. The era was not rocket science but the basics are all there.
If we can't help here I fully endorse any moderator to suggest another place to go for help. Mixed crowd here of old pharts and sharp younger techs. Anyone welcome that plays by common decency of a family friendly site. Do dirt somewhere else and I don't care about that,
T
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re-tired
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May 18, 2012, 8:32 PM
Post #9 of 15
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Re: 39 ford flathead overheating
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Coolant needs to remain in liquid form when it circulates through the motor. Back in the old days, all cars used low-pressure cooling systems, so coolant often boiled. If it boils, steam pockets form, and when you have steam, you'll get cracks. The solution is to raise the boiling point by upping coolant-system pressure to 17-21 pounds, using a modern crossflow radiator and higher-pressure cap. A high-pressure system will run fine with no boiling, even at 190-210-degree gauge temps.
Not all flathead water pumps are created equal, though. For improved cooling efficiency, original '49-'53 pumps have more impeller vanes than earlier models. Speedway Motors offers pumps with sealed bearings that do an even better job in both early and late configurations. Tom Roberts starts with the Speedway pump, modifies it for even more flow, and also redoes the snout to accept modern, bolt-on, serpentine-belt pulleys. Ultimately, you can move up to one of Cornhusker Engineering's custom front cover and late-model water-pump setups
LIFE'S SHORT GO FISH
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re-tired
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May 18, 2012, 8:40 PM
Post #10 of 15
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Re: 39 ford flathead overheating
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BTW ,,,,A "Flattie" can be had with a ECM .For the EFI o'course...
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EFI
Yes, you can have a classic flathead with modern fuel injection. Hilborn and Ardun Enterprises offer EFI conversions that look like old-time stacks but with EFI nozzles. TBI injection through billet Stromberg 97 carb-like throttle-bodies is available from Flathead Engineering. Mooneyes also offers throttle-bodies that resemble Strombergs. A new player is Gemini Electronic Fuel Injection, a complete bolt-on flathead conversion kit based on the self-programming Prodigious fuel injection system. There is also an Australian outfit, Flatattack Engineering, offering plenum-style, TPI-like systems controlled by either GM Delco or MoTeC computers. -
 Ardun Enterprises' overhead-valve hemi heads are shown with old-school mechanical stacked injection converted to EFI, all on Ardun's new aluminum block. Cornhusker Engineering offers the billet front cover that accepts a Chevy 409 water pump. Ardun Enterprises' overhead-valve hemi heads are shown with old-school mechanical stacked -
 Flathead Engineering offers single, twin, and quadruple TBI systems. The single and twin use its billet Stromberg 97-style throttle-bodies, with the twins mounted on a Baron-supplied Thickstun PM7 intake. The four-throttle-body setup is based on Weber-style throttle-bodies, controlled by a Redline Weber 442 ECU that comes throttle-mapped. Flathead Engineering offers single, twin, and quadruple TBI systems. The single and twin u -
 Gemini Electronic Fuel Injection looks like traditional mechanical fuel injection but is a fully functional point-EFI setup controlled by the self-programming, self-learning, Prodigious fuel-injection system that is claimed to need no tuning. Gemini Electronic Fuel Injection looks like traditional mechanical fuel injection but is a
LIFE'S SHORT GO FISH
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 19, 2012, 3:44 AM
Post #11 of 15
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Re: 39 ford flathead overheating
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OMG - RT - Where on earth do you come up with this stuff?
I'll just add the pressure will increase boiling point near exactly 3 degrees "F" per each pound of pressure..............
Tom
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kensoncustom
User
May 19, 2012, 1:55 PM
Post #12 of 15
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Re: 39 ford flathead overheating
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shot it with my laser temp tool runs 190 205 put new cap and temp sensor problem solved thanks guys for all your help
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 19, 2012, 3:14 PM
Post #13 of 15
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Re: 39 ford flathead overheating
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Thanks for the report of success at a fix,
T
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nickwarner
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May 19, 2012, 7:30 PM
Post #14 of 15
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Re: 39 ford flathead overheating
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After RT's info I want to put a flattie in my Suburban for some reason. Just looks too cool to pass up.
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kensoncustom
User
May 19, 2012, 11:38 PM
Post #15 of 15
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Re: 39 ford flathead overheating
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saw one in a bike one time was cool & warm at same time
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