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Author Topic: hot flathead  (Read 4058 times)
tracer64
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« on: August 09, 2012, 02:19:54 am »

i had been running the flathead in my 41 project without any problems.  Then it started barely making it back and forth to work without overheating.  I did the basics, thermostats opening, even flow from both pumps, timing set correct.  I bought the test kit from napa to test for exhaust gases in the coolant...none.  I did a compression check, they all were 120 except for 6 & 8 which were 60.  I know the gasket is bad, but would this cause the heating issue?
Thanks
Tracy
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FordRacing250
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« Reply #1 on: August 09, 2012, 03:06:36 am »

how do the plugs look on those 2 cylinders? Is it just now happening because the hot weather?
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tracer64
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« Reply #2 on: August 09, 2012, 11:19:49 am »

The plugs look ok.  Guess it could be because of the weather, but it still shouldnt overheat.  Why would those 2 be so low, basically half the others?
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FordRacing250
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« Reply #3 on: August 09, 2012, 12:31:51 pm »

The plugs look ok.  Guess it could be because of the weather, but it still shouldnt overheat.  Why would those 2 be so low, basically half the others?
That can be the gasket or ring seal. Flat heads are also known for warping heads. Have you done a leak down test?
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tracer64
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« Reply #4 on: August 09, 2012, 01:01:13 pm »

No, I have never done one, on anything before...lol  First time for everything.  I have a set of aluminum heads on the floor, maybe this is my excuse?  I'll pop the head tonight (its nice, everything is super easy to get too) and post a pic of what I find.
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FordRacing250
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« Reply #5 on: August 09, 2012, 01:42:49 pm »

Good luck, Ive always like the old flatheads. I will own a rod one day with a flatty in it.
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tracer64
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« Reply #6 on: August 09, 2012, 05:31:22 pm »

I went home at lunch and discovered that the center two head bolts were barely more than finger tight.  I went ahead and pulled the head to check, other than you can clearly see where the gasket leaked, I couldnt find any cracks or such.  Ill pull the other tonight.


* CAM00217.jpg (618.38 KB, 2560x1920 - viewed 498 times.)
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tracer64
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« Reply #7 on: August 09, 2012, 05:33:12 pm »

Thought ford guys would like this, ford stamped on the valve...


* CAM00211.jpg (696.9 KB, 1920x2560 - viewed 504 times.)
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