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Old 10-30-2020, 12:18 PM   #21
flatjack9
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Default Re: flathead engine temps?

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Originally Posted by Ol' Ron View Post
Very interesting, First at what rpm is the 60lb oil pressure, seems very high. Yea I agree with you the upper radiator hoses should be at the hi temp. I like to run my engines between 180/200 for best economy and longevity
60 psi is very high? I don't think so.
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Old 10-30-2020, 12:25 PM   #22
G.M.
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Default Re: flathead engine temps?

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I don't get it. This statement contradicts many threads on here.
I stick with my xplenation. G.M.
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Old 10-30-2020, 12:32 PM   #23
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Default Re: flathead engine temps?

What weight oil are you using?
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Old 10-30-2020, 12:47 PM   #24
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Default Re: flathead engine temps?

WABOOM: Maybe there's a ton of sediment sitting in the bottom of the radiator.
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Old 10-30-2020, 12:49 PM   #25
Norris McCarty
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Default Re: flathead engine temps?

There is nothing wrong with your oil pressure especially if you're running a 50 weight oil. You should be running 30 weight, especially this time of year.....I run it year round.
Too many people freak out on oil pressure.
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Old 10-30-2020, 01:22 PM   #26
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Default Re: flathead engine temps?

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Originally Posted by G.M. View Post
YES in all the old Fords the HOT water is moved out the bottom hose
connections up through the radiator into the top tank. From the top tank
through the top hoses and back into the engine. G.M.

"The coolant follows a path that takes it from the water pump through passages inside the engine block, where it collects the heat produced by the cylinders. It then flows up to the cylinder head (or heads in the case of a V-type engine) where it collects more heat from the combustion chambers. It then flows out past the thermostat (if the thermostat is opened to allow the fluid to pass), then through the upper radiator hose and into the radiator.
The coolant flows through the thin, flattened tubes that make up the core of the radiator and is cooled by the air flow through the radiator. From there, it flows out of the radiator, through the lower radiator hose, and back to the water pump."
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Old 10-30-2020, 06:29 PM   #27
derek costello
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Default Re: flathead engine temps?

OK guys........I have used the infrared temp reader correctly ( shooting non reflective areas,
and shooting tanks, casting, etc) AND with the cap removed on my NEW radiator I can see the water is flowing from the heads up into the top rad tank.. I also have independent mechanical gages mounted on the engine to verify the electronic ones.
Their are no tricks here, I just thought someone might have a suggestion on why I am getting this backward temperature reading!
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Old 10-30-2020, 06:51 PM   #28
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Default Re: flathead engine temps?

Have any of you ever heard of "water jet" cutting steel.?? This is where water under hi pressureseveral hundred lbs, is forced through a very small hole. Having too much oil pressure in my firs stock car engine I broke the crank oil under hi pressure coming out of the main bearings cut a grove in the crank shoulder. After a dozen races it broke, "Cavitation erosion ". Flow is more important than pressure.
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Old 10-30-2020, 08:48 PM   #29
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Default Re: flathead engine temps?

read what our friend said [ the coolant is about 1" over the core " not full so my guess is where he is shooting the hoses there is NO coolant only air so if he tops off the coolant and retries bet he gets totally different readings Air pockets can create absolute havoc they cause overheating yet read cold [due to lack of heat transfer] and worst of all if they shift rapid temp change and cracking
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Old 10-31-2020, 01:30 PM   #30
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Default Re: flathead engine temps?

Water jet cutting requires 20K to 50K psi to cut steel. I find if hard to believe that 60 psi oil pressure can "cut" and destroy a crank even if it doesn't have radiused fillets at the journals. Machining a radius on the journals reduces stress. However, I am not an expert but have seem 6 in. thick steel water cut. It's amazing.
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Old 10-31-2020, 06:01 PM   #31
derek costello
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Default Re: flathead engine temps?

perhaps that is a good idea, I maybe shooting at steam pockets?? so I will fill the rad to the ver, very top and get back to this forum with the results after that.......
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