706 Overhauled but knocking

Posted by TonyO on February 21, 2006 at 21:21:32 from (64.85.216.118):

I need some help and any help is extremely appreciated. I just bought a Farmall 706 at an auction for $1900. The motor has been completely overhauled (what I am told and I have it apart and it definitely has new pistons, pins, rings, and sleeves. All new gaskets everywhere, new valves and guides....basically everything looks new). I have the motor completely torn down because it had a knock in the front of the engine. I checked the crank and it has been turned under .010 and looks good. The piston pins are all in great shape. The pistons and sleeves are both in great shape. I have not had the crank checked for out of round yet however. What do you all think my problem is? The knock could not be heard at an idle. When you throttled it up it would knock. The oil pressure on the tractor was 35-40psi. What do you all think? I have heard of 706's needing to run on higher octane fuel, would this cause a distinct knock in these motors? I pull OLIVER tractors so know nothing about the IH engine. The tractor did run good as far as hitting all 6 cylinders goes. No missing! I am scratching my head here. I know it is probably something simple that I haven't found, but I NEED help!!! Thanks in advance for any help you can give.
Thanks,
TONY O.

Replies:

• Re: 706 Overhauled but knocking TonyO 17:23:58 02/22/06 (0)
• Re: 706 Overhauled but knocking NickMN 12:00:09 02/22/06 (0)
• Re: 706 Overhauled but knocking captaink 09:05:40 02/22/06 (0)
• Re: 706 Overhauled but knocking TonyO 07:58:48 02/22/06 (0)
• Re: 706 Overhauled but knocking TonyO 07:57:06 02/22/06 (0)
• Re: 706 Overhauled but knocking Sloroll 06:43:54 02/22/06 (0)
• How about piston pin fit? steve from mo - dangit! 06:34:26 02/22/06 (0)
• Re: 706 Overhauled but knocking billde 04:53:10 02/22/06 (0)
• Re: 706 Overhauled but knocking FatRedneck 04:13:09 02/22/06 (0)
• Re: 706 Overhauled but knocking El Toro 04:12:34 02/22/06 (0)
• Re: 706 Overhauled but knocking Rheno 22:02:14 02/21/06 (0)

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