Water temperature OK. Engine temperature hot. - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #1 of 24 (permalink) Old 08-05-2007, 11:58 AM Thread Starter
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Water temperature OK. Engine temperature hot.

I thought I cured this problem when I discovered my cam was retarded but even after correcting the cam I still have a very hot engine (ie, manifold, heads, water pump, carb very hot to the touch). The weird part is the water temp is steady at 200 degrees and I have no boil over.
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post #2 of 24 (permalink) Old 08-05-2007, 01:14 PM
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Re: Water temperature OK. Engine temperature hot.

I had that identical problem on my 351 Bronco after I removed the mechanical fan and installed an electric fan with thermostat.

Apparently the mechanical fan was circulating lots of air around the engine and cooling it somewhat.

The electric fan took quite a while to come on and the heat from the exhaust manifolds was unreal.

Another thing to check of course would be a faulty mechanical thermostat.
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post #3 of 24 (permalink) Old 08-06-2007, 02:50 AM
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Re: Water temperature OK. Engine temperature hot.

I have been considering using Hood Loovers to let some heat out of the engine compartment, when sitting stopped, you can feel huge amounts of heat coming out under the front of my car. If your standing in front of it.

You have more then just engine heat, the headers are spitting out lots of heat, and without air movement from driving, the heat will only raise into the engine compartment. Especially if you just did a 1/4 mile pass, and come to a stop, those headers will be "white-hot" for a few minutes, no time to cool down, so they heat up your engine compartment.


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post #4 of 24 (permalink) Old 08-06-2007, 08:31 AM
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Re: Water temperature OK. Engine temperature hot.

Is it possible you're pushing the water to fast through the block to soak up the heat?

Jeff in Georgia
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post #5 of 24 (permalink) Old 08-06-2007, 11:55 AM
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Re: Water temperature OK. Engine temperature hot.

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Originally Posted by 1bad6t View Post
Is it possible you're pushing the water to fast through the block to soak up the heat?
I would not think so. I have a 33% more capacity pump, and a high flow stat, and the water is at a reasonable rate when it is flowing in trhe radiator. With a regular thermostat, and a high capacity pump, the water is barley a trickle into the radiator. That is a bad combo to have.

Plus, the water temperature gage has a slow responce time, so you get average engine temperature, not dynamic temperature. There is more then enough surface area in a block and heads to make sure the water is at the same temperature as the block, no mater how reasonably fast the water is moving.

Could be too fast for in the radiator, to extract the heat from the water, but I would not think he has a huge water flow rate.

If you have a thermostat radiator cap installed, a good functioning system is 187 in the block, and 155 - 160 at the radiator. That is almost 30 degrees of cooling. A good differential of 30 degrees, means the radiator has spare capacity to cool.


What is life worth, if everything comes easy...?
66 Stang 385+ HP 306 .494 /.520 225 durr @.05, 200cc Windsor Sr's, Edle RPM, C4, 3.00 posi, 575 Annular Mighty Demon, 22 MPG,
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post #6 of 24 (permalink) Old 08-06-2007, 01:08 PM
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Re: Water temperature OK. Engine temperature hot.

Is there any possibility that you are running the wrong head gaskets and the water flow to or back from the heads is restricted ? Possibly if you can check the block water temp versus the head water temp that may show something.
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post #7 of 24 (permalink) Old 08-06-2007, 01:33 PM
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Re: Water temperature OK. Engine temperature hot.

Borrow a laser temp gage and see what the metal is really running as far as temp. Cast iron at 200F is going to be way to hot to touch.




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post #8 of 24 (permalink) Old 08-07-2007, 08:56 AM Thread Starter
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Re: Water temperature OK. Engine temperature hot.

Ran down to Summit and threw one of these in there. Not sure what the advantage of this kind of thermostat is but I recall some guys recommending it. It's the one where the spring assembly is in some kind of enclosure. Well, I wouldn't say my engine temps are where I've seen them on other motors but my water temp is now between 185 and 190.

Thanks guys.
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post #9 of 24 (permalink) Old 08-07-2007, 09:52 AM
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Re: Water temperature OK. Engine temperature hot.

That is a Milodon High Flow Stat. It flows over 130% more water then a standard stat.

A Satandard Flow Stat and a high flow pump is a combination that does not work well at all. I recently ran that experiment to verify this.


What is life worth, if everything comes easy...?
66 Stang 385+ HP 306 .494 /.520 225 durr @.05, 200cc Windsor Sr's, Edle RPM, C4, 3.00 posi, 575 Annular Mighty Demon, 22 MPG,
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post #10 of 24 (permalink) Old 08-08-2007, 07:10 AM
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Re: Water temperature OK. Engine temperature hot.

What typ of car is this?

64 Fairlane 351w, c/4,3000 stall, 4.11s,track lock 68 Torino sports roof 351w,2500 stall, Aode/w 3.73 8.8 track lock, , 73 F-100 4x4,428 Try-power,4 speed.
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post #11 of 24 (permalink) Old 08-08-2007, 08:36 AM
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Re: Water temperature OK. Engine temperature hot.

Jon, I don't know what you're building (I'm too lazy to look...) But, 200* is not a bad temp to work with if you're using modern building materials.

The only bad part is boiling fuel in the carb. ON FI car's 220 is when 90% of the cooling fan's come on.

I hope that new stat works for you.

FE
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post #12 of 24 (permalink) Old 08-08-2007, 09:56 AM Thread Starter
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Re: Water temperature OK. Engine temperature hot.

It's the same 460 I've been messing with for years.

http://www.fordmuscle.com/archives/2...rded/index.php
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post #13 of 24 (permalink) Old 08-08-2007, 10:08 AM
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Re: Water temperature OK. Engine temperature hot.

I've noticed something similar with my new 408..It runs nice and cool,just a tad under 180 which is where the thermostat opens but the metal around the engine compartment is very hot..I recently opened the hood and was looking at something and put my hand on top of the end of the shock and I couldn't believe how hot it was..Then I felt the export brace and it was the same..My theory is maybe the aluminium top end of the motor is disapating more heat upwards than a cast iron setup?


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post #14 of 24 (permalink) Old 08-08-2007, 10:16 AM Thread Starter
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Re: Water temperature OK. Engine temperature hot.

"maybe the aluminium top end of the motor is disapating more heat upwards than a cast iron setup?"

I'd like to see this verified because I wondered the same thing and yes the top end of my 460 is all aluminum. I have/had cast iron motors that run the same operating temp for which I could rest my face on the valve covers.

Sounds like something that could easily be confirmed.

Either way, that new stat I got has helped bring the temps down to a more comfortable range (could be better). Gonna get one for my 78 Ford truck too.
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post #15 of 24 (permalink) Old 08-08-2007, 10:32 AM
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Re: Water temperature OK. Engine temperature hot.

Quote:
Originally Posted by frdnut View Post
I've noticed something similar with my new 408..It runs nice and cool,just a tad under 180 which is where the thermostat opens but the metal around the engine compartment is very hot..I recently opened the hood and was looking at something and put my hand on top of the end of the shock and I couldn't believe how hot it was..Then I felt the export brace and it was the same..My theory is maybe the aluminium top end of the motor is disapating more heat upwards than a cast iron setup?
Hmmm, add my 393w to the list. I have good cooling plus a shroud and yet all metal objects are very hot. Temperature wise my car runs cool. My headers are uncoated so I have been blaming them for the excess heat . . . . .

Dennis

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