Late X- rod and piston close ups

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Model T Ford Forum: Forum 2015: Late X- rod and piston close ups
Top of pagePrevious messageNext messageBottom of page Link to this message  By Dan Treace, North FL on Wednesday, November 25, 2015 - 02:21 pm:

Have seen pictures of the late '27 X-rod and thin pistons, but until this week never held any or inspected them. Got this one in the stash of Ford parts this week, comparison pictures of the differences to earlier piston and rod.

Measured them on the scale, the X-rod and thin piston weighed 3 lbs. The normal rod and piston on the left is 4lbs. 6 oz.




The thin piston has a slight dome shape on the surface of the head.




The X-rod has no bolt to secure to the piston pin.




And there is an oil hole on the upper part of the X-rod




Leads to holes drilled in the upper cap for oil to the bearings.


Top of pagePrevious messageNext messageBottom of page Link to this message  By charley shaver- liberal,mo. on Wednesday, November 25, 2015 - 04:50 pm:

x rod looks like the same set up used in early 1928 mod a fords.charley


Top of pagePrevious messageNext messageBottom of page Link to this message  By joe bell on Wednesday, November 25, 2015 - 05:20 pm:

Not all the X rods are drilled on top, some one must of added them from all the sets I have seen.I have been told that Egge carries a piston for those rods? I have never order any, I have bushed the rod down to size, shorten the wrist pins and add snap rings to hold pins in place.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Roger Karlsson, southern Sweden on Wednesday, November 25, 2015 - 05:54 pm:

What's holding the piston pin in the x-rod piston? Press fit or a cold pin installed while the piston is heated hotter than usual?


Top of pagePrevious messageNext messageBottom of page Link to this message  By joe bell on Wednesday, November 25, 2015 - 06:32 pm:

Snap ring like A's have in the middle of the rod.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Howard Tomlinson on Wednesday, November 25, 2015 - 06:53 pm:

I have a set of 4 X-rods and "tin can" pistons. My rods are much lighter than those pictured and the pistons are different. The pistons are constructed of welded steel parts and have no rings at the bottom of the skirt. I'll try to weigh them tomorrow.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dean Yoder, Iowa City IA. on Wednesday, November 25, 2015 - 07:03 pm:

Factory prints at Benson Ford show No hole in the rod. Only in the cap, for the dipper. If I remember correctly the earliest date for X rod & cap is 1925.


Top of pagePrevious messageNext messageBottom of page Link to this message  By David Sullivan on Wednesday, November 25, 2015 - 07:06 pm:

Howard, how about a picture of one of those pistons,never seen anything like that. Thanks, Dave in Bellingham, WA


Top of pagePrevious messageNext messageBottom of page Link to this message  By Charlie B actually in Toms River N.J. on Wednesday, November 25, 2015 - 07:10 pm:

Where's that snap ring supposed to be again?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Tom Carnegie Spokane, WA on Wednesday, November 25, 2015 - 07:17 pm:

I have a set with aluminum domed pistons. I have always wondered if they were original Ford. My gut reaction is that they are, as I can't imagine any private company would tool up to make pistons for such a small market.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dean Yoder, Iowa City IA. on Wednesday, November 25, 2015 - 07:23 pm:

Just checked 11/24/1924 is the earliest date I have
for the X rod.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Erik Barrett in Auburn Ca. on Thursday, November 26, 2015 - 12:40 am:

I have an NOS X rod, no holes in the rod, just the dipper hole in the cap. I don't know why anyone would want to use these rods, Ford carried the design into early model A production and went back to conventional H beam rods right away. There's a reason for that. That are great conversation pieces, no more.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Howard Tomlinson on Thursday, November 26, 2015 - 11:06 pm:

Charlie,

The snap ring resides in a slot in the wrist pin part of the rod. The wrist pin has a corresponding slot around it that the ring engages (at least on my set!!).

I am going to try to get some pics tomorrow (I've never uploaded pics here).


Top of pagePrevious messageNext messageBottom of page Link to this message  By Kohnke Rebabbitting, Clare, Iowa on Sunday, November 29, 2015 - 10:31 pm:

The x, or star rods for the Model T are good, useable strong rods. The only draw back is aligning them.

They are hard to grab for changing the off set unless you have a rod press, in which we do.

The twist and bend can be done on a shaft that is held solid.

Here are some pictures of a Model A , 1928 rod that looks just like the very late Model T rods, Holes and all, that we done many sets of over the years.

This Model A rod is just roughed out and is .060 thousandths under, to be machined to what ever size. It is a spun poured Rod.

thanks, Herm.



Top of pagePrevious messageNext messageBottom of page Link to this message  By James Michael Rogers on Monday, November 30, 2015 - 07:38 am:

Dan, I have a full set of those rods and one major difference I see in them is the rod bolts are locked in like a Model A rod but are 3/8" instead of 7/16" like a Model A.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Howard Tomlinson on Sunday, December 27, 2015 - 05:07 pm:

Hello Everyone,

I finally dug out the x-rods, pins and "tin can" pistons. I hope can get the pictures to upload. My rods seem significantly thinner than those pictured above. The pin shows the groove in the center for the rod connection. The pistons are essentially sheet metal.

pics




Top of pagePrevious messageNext messageBottom of page Link to this message  By Wayne Sheldon, Grass Valley, CA on Sunday, December 27, 2015 - 07:42 pm:

Interesting, Howard T, I have never looked at any of these close up before. 45 years in this hobby, and I have seen few, and know almost nothing about these pistons or rods. Thank you.
Still learning.
Drive carefully, and enjoy, W2


Top of pagePrevious messageNext messageBottom of page Link to this message  By David Sullivan on Sunday, December 27, 2015 - 08:53 pm:

Thank you, Howard, for showing this, I was unaware. I have seen early V8's with this type of piston, they were very light, probably as light as aluminum, or close. Dave in Bellingham, wa


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