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MG TD TF 1500 - connecting Rods

Good Day everyone.

I have a spare engine that came with my TD. As I was rebuilding the car, I used a few parts off it and now have decided to build the engine up as a spare, or to possibly sell in the future.

The pistons and rods that came with the engine were unusable, as they were stored in a plastic tub that got water in it.

I have purchased used rods from ebay, along with a set of +40 pistons. I removed the pistons from the rods today to begin cleaning, and I noticed that the holes on the small ends of the rods, on two of them were not concentric with the tops of the rods. Is this normal?

Photo of the ends attached. The two at the top are the rods with the non concentric holes.


Thanks for any info

Joe Hine
53 TD

J.D. Hine

Just noticed that my email address on the post is wrong

rv4flyer@gmail.com is correct.

Joe
J.D. Hine

Are all four rods the same part number? Looks like at least three are. I'd say what you see would be called normal. Compare them and you'll find the hole centers (pin to rod journal) are the same, or close enough for an MG. Some of us discovered rods with different part numbers. Photo shows a shiny set just shotpeened, three MOWOG 24005*18 and one MOWOG% 24005*19. Close enough.

JRN JIM

Thanks....I never thought to check the part numbers. I'll do that tomorrow.

Joe
J.D. Hine

Never, ever be tempted to open out the hole in the little end with a screwdriver or similar tool. If the gudgeon pin is tight wind it out with a piece of screwed rod and spacers. I had the rods and crank from my 1932 MG M Type crack tested. All the rods showed stress fractures at the oposite side of the little end pinch bolts. These had been caused by someone in the past leavering open the little ends. The bottom line was several thousa and pounds for a Phoenix crank and rods. The new rods had bushed little ends rather than pinch bolts.

Jan T
J Targosz

Jan,

I did what you opted for when I rebuilt my TF-1500: New billet crank, fully floating gudgeon pin Sanez H-pattern rods (no pinch bolt), and new forged pistons to match. I feel much better about driving the motor than with the pinch bolt set up. New xpeg blocks are pretty hard to come by.

Alex
Alex Waugh

When I built my motor, I went with modern steel rods by Crower in CA. also Venolia pistons and the modern crank. I too feel much better than I did with the old stuff in there.
Tom Maine

guys..thanks for your replies, but I still don't have an answer to my question. Are the two none concentric holes in the small ends of these rods a problem? Thanks

Joe
J.D. Hine

Joe,
No problem. Since they're used, they probably have tens of thousand of miles proving they'll work.
JIM
JRN JIM

No problem at all - I just checked a dozen rods and 5 of them are eye-ball off-center, including a set of NOS rods.

Tom Lange
MGT Repair
t lange

Thanks Guys..

Joe
J.D. Hine

This thread was discussed between 11/01/2014 and 17/01/2014

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