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MG MGA - Should I save this crank?

The crankshaft I removed from my engine was turned .050" under on the rod journals. I know the limit is .040 so I ended up using another crank during the rebuild. I there any reason I should hang onto this crank, or just toss it (its taking up storage space!)

Thanks, George
G Goeppner

I have had one welded up to rebuild it to stock diameters. I haven't checked the cost recently, but at least $40 per journal for the welding. So add $160 or more to the normal cost of regrinding 7 journals. For that money you may be able to buy a good used crankshaft, in which case the undersize one is scrap iron.

Any clue where anyone ever found 0.050" undersize rod bearings. I though they were only available to 0.040".

Barney Gaylord

Barney, I wondered that too. I think I saved the old bearings, I'll see if there's any name on them.
G Goeppner

Hi there
Go to mga twin cam bearings 0.050 and even 0.060


MGA Austin A40 A55 & Nash Met Main Bearings VP246 .060 (Fits: MGA Twin Cam)
Will it fit????

Martin
sharpeys

I wouldn't throw out an uncracked crank. Can you say stroker?
Martin - Should.

FRM
FR Millmore

I have a twin cam crank that has been ground with sharper than normal radius. Is it possible to have it welded and reground to reduce the stress at the radius?

Thanks,
Ian
IJR Renshaw

I have always wondered about the effects here. I suspect a lot has to do with welding procedure, possible pre & post weld heat treat etc. It would all vary be material as well. I would consult a professional race crank expert - who will also grind it correctly!

FRM
FR Millmore

Just to add additional information here. Both the rod journals and the mains were turned .050. The main bearing shells are identified by the letter "G" inside a square, the letters "DD", the number S8537M, and .050 U/S. The rod bearing shells have the letter "V" inside the letter "P", both of these inside a circle, and the number G3016M. For what its worth....

George
G Goeppner

George-

Memory here, and not looking for numbers.
The "G" may be "Glacier" a long time bearing manufacturer/supplier.
The "VP" is Vandervell, same deal.
You might inquire of Basil Adams, easily found on MGExp boards, as he has been squirreling away Vandervell tri-metal bearings for years, and I'm sure has all the catalogues and numbers.

FRM
FR Millmore

This thread was discussed between 19/06/2012 and 26/06/2012

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