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Ford 9N, 2N & 8N Discussion Forum

piston rod

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Ball Bearing

01-02-2007 17:26:24

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Is it possible to put a rod in backwards (not the piston and not the cap- the rod). It appears to be symetrical. Even though all the pistons face the front, only 2 of the rods do. Thanks B.B.

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Ball Bearing

01-03-2007 05:23:03

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Thanks Zane and Dan in reply to Ball Bearing, 01-02-2007 17:26:24

This '42 2n was rebuilt and nothing is original. The guy made several errors and I am becoming gun shy. He used TONS of silicone where the gaskets went. Thanks again. B.B.

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ZANE

01-02-2007 19:06:01

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Re: piston rod in reply to Ball Bearing, 01-02-2007 17:26:24

All Ford tractor engines built up to about 1968 have the bearing keepers on the rod inserts on the left side of the crankshaft. Don't know about later ones since that is about when I left the Ford tractor dealership where I was the cheif mechanic, parts manager and counter man and toilet cleaner etc. One man band!

Replacement rods do not have numbers. Rebuilt rods can have differnet numbers but have been machined to match.

Never mix rod caps or main bearing caps. Never!

Zane

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Dan

01-02-2007 18:18:55

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Re: piston rod in reply to Ball Bearing, 01-02-2007 17:26:24

I asked my machinist the same thing on my first rebuild. He said it did make a difference because of the forces put on the rod as it is moving the piston at an angle. I do remember he had trouble locating the correct way though...

I go by the I&T manual which states "The oil squirt hole in the connecting rod can face the front or rear" - meaning to me that it really does not matter which direction the rod is installed. A good rule of thumb if re-using these connecting rods - mark the original location and direction, and replace them is the exact same configuration (unless you find an obvious error like the cap being on backwards).

Usually - the rods are marked with the cylinder number on the rod and the cap, these need to be on the same side - and every engine I have been in has these markings closest to the cam shaft.

HTH,
Dan

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