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Harry Ferguson Tractors Discussion Forum
Show Parts for Model:

Re: to-30 over heat

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Tony in Mass.

10-15-2013 06:34:33
76.127.225.182



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Way off time, can run and start, but get things way too hot.
I get yelled at a lot on here, but if you don't live in the arctic, take out your thermostat and leave it out. Everything clean and clear in the system? new water pump too? Timing and thermo.
So where is the block broken? BTW, the heads you been replacing- you triple check the holes? Make sure ALL the holes line up for the passages. OH, and the absolutely correct head gaskets too.

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Tom Bowman

10-15-2013 07:50:16
108.247.41.46



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 Re: to-30 over heat in reply to Tony in Mass., 10-15-2013 06:34:33  
Quoting Removed, click Modern View to see

I don't mean to hijack the thread, BUT, regarding the holes lining up for the passages: on the TO-20, coolant passages in the head look like "smiley-faces", but they line up with a single round hole in the block.

And, a large, oval-shaped oil passage in the block lines up with two small round holes in the head.

The head and the block are both labeled "Z120", so I'm sure they're the right parts, but it still looks funny.

Is there a reason for the different size/shapes?

The Fel-Pro 7558B head gasket has the "smiley-face" hole for the coolant passage, and the large, oval-shaped hole for the oil passage.

Here are some old pictures of my dirty block and head, to show what I'm talking about:

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oldmisterbill

10-21-2013 05:58:42
173.187.163.20



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 Re: to-30 over heat in reply to Tom Bowman, 10-15-2013 07:50:16  
Tom I'm not sure why they cast it like that.Maybe because it was easier to cast it that way ,maybe because it would allow more water surface area to transfer the heat. As for the over heating - after so many repairs a good inspection would be in order. Especially checking the surface of the head with the block to check for perfect flatness. Cracks? Rust crud. Does it build pressure B4 it gets warm (sign of gasket , crack, compression leak). 30 yeqrs ago a customer bought a problem engine to me it was over heating & nobody could ix it , nor find the problem. I lost my confidence in radiator "sniffers" (a chemical test to check for exhaust gas in the coolant)over that one.I couldn't find it either ,but it was steaming slightly out the exaust engine - no leak.n On a hunch -It was a v6 I pulled the intake and head replaced the gaskets (after checking the surface) and it was fixed. I never found the exact leak ( probably very tiny ) but it was fixed. My point is an over heating problem can be caused by so many variabkes - BE VERY thorough in your inspections.
This post was edited by oldmisterbill at 05:59:57 10/21/13.

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Tony in Mass.

10-21-2013 06:36:10
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 Re: to-30 over heat in reply to oldmisterbill, 10-21-2013 05:58:42  
Thinking about this thread the other day reminded me of the old joke from that woodworker on TV. After 3 new heads and 5 new handles, it's still grandpa axe!

2 heads? 2 blocks? You don't even have any of the same engine!
So, radiator, distributor, manifolds are... there from the first 'engine' that broke from overheading? You don't even have the same tractor anymore, your heat comes from something wrong with just plain bolt on parts...

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