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Harry Ferguson Tractors Discussion Forum
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Re: TO20 TE20 Cracked block Epidemic STUDY topic.

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cphillips

09-24-2012 13:32:40
167.206.233.254



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when I bought my to-20 the block was cracked between each cylinder and a large external chunk missing, I know for a fact it did not have anti-freeze in it only water. I replaced with a salvage yard block and rebuilt internals and it has been great and trust me I push it to the limit, I do not think overheating would ever crack in-between the cylinders like mine was, I would think the head would go first with the heat. Here is a video of me attempting to pull a very large sled (for the ferguson) with it.

http://www.youtube.com/watch?v=K8s_4esjhvY&feature=plcp

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Jason S.

09-24-2012 14:21:44
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 Re: TO20 TE20 Cracked block Epidemic STUDY topic. in reply to cphillips, 09-24-2012 13:32:40  
In my opinion I don"t believe all of it is due to overheating or freezing and cracking. I have no doubt that those circumstances cause a lot of it but there are many cases of the tractors being well taken care of and the blocks still crack. I believe it"s due to two things. Casting back then is not what it is today. I have seen several older cast pieces that have air pockets and such in them but mostly I believe it is due to stress. I used to build a lot of high performance car engines. If you are using stock rods or cranks it"s a good idea to remove the casting lines and polish them or they develop stress risers and crack. If you look at the z120 blocks they crack right along the casting seams and I think that being subjected to lots of hard work and lots of heating and cooling cycles causes a lot of it..and of course the poorer casting processes back then.

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