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Farmall & IHC Tractors Discussion Forum
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smta rebuild

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1958IH450

01-27-2008 07:16:35




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ok so if i already have the smaller wrist pins in my smta what kind of a kit do i need to get to rebuild it? all of the kits i am finding say the wrist pins are 1 5/16" mine are the 1" i just want to get the rite kit. any help would be grate.




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D Slater

01-27-2008 09:24:44




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 Re: smta rebuild in reply to 1958IH450, 01-27-2008 07:16:35  
IH used to sell overbore pistons for M on up with the small pin. Several different types were used because of the differance in combustion chamber beween some engines, fuel type and elevation wanted. A thicker wrist pin bushing was used in M, SM, SMTA, and part of the 400 tractors in the standard rod to use the small pin pistons. Later 400 and all 450 used a rod with a smaller pin end and standard thickness bushing for the small pin.
Now I think piston choices are limited. If you have the stock SMTA rod with adapter bushing in it you could use both types of pin with the correct wrist pin bushing installed. If someone happend to replace your rods with late type your limited to small pin. You can make sure which rod you have by the # on it.
If your going to keep the small pin you need 4-1/8 pistons for 450 later 400 tractors.
Don't know if this is still the case but those pistons used to give a lower compression from a 450 gas into a SMTA gas because of combustion chamber differances compared to ones sold for the MTA combustion chamber.

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wildman from mo

01-27-2008 08:42:01




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 Re: smta rebuild in reply to 1958IH450, 01-27-2008 07:16:35  
I sell Tisco parts,&my book shows kit pk164 412.94 plus frt.I should be around 350.00 for it frt included.this is for stepped head piston's ring's,pin's&retainers for4 1/8 overbore.Complete kit is higher & I'm so slow at typing give me a call cell 314-313-9948 8 to 8 7 days a week thanks gene



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