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Minneapolis Moline Tractors Discussion Forum

10A149A Blocks

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Gary

09-10-2003 18:43:22

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I have the engine in my UB torn down searching for a coolant leak, cracked block by the way. Anyway, the bores measure 4.375" rather than the standard 4.250" and the pistons which are stamped "standard" measure 4.372". I believe the only MM engine with a 4.375" bore is a 451 diesel. So I'm assuming 451 diesel pistons are in this engine. Just curious if this is an acceptable practice and when I put this engine back together should I buy rings for a 451 diesel engine? Does it sound like I'm on the right path? Thanks for any rsponses!!

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Shawn

09-15-2003 19:07:15

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Re: 10A149A Blocks in reply to Gary, 09-10-2003 18:43:22

Hello
I have 4 blocks that are good and am only about 3 hours south of you in east central illinois,
i wont be using these block i would sell you one and give you the other.
call me or email me for details if your intresested
217-834-3102
Thanks
Shawn

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bill

09-10-2003 18:59:05

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Re: 10A149A Blocks in reply to Gary, 09-10-2003 18:43:22

The M and W pistons were sometimes marked standard even though they were .125 oversize. You will have to measure each rings thickness and find a set that matches those measurements.Most engine shops have a book listing rings by dimension as well as application. Some even have the m & w listings as well.I assume you will just get another block and bore it to fit those pistons.

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Gary

09-11-2003 17:10:15

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Re: Re: 10A149A Blocks in reply to bill, 09-10-2003 18:59:05

Bill, Thanks for the information. Do you know if there are any identifying marks on M & W pistons. And, yes I am replacing the block but haven't found one yet. Thanks, Gary

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Bill

09-12-2003 21:03:33

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Re: Re: Re: 10A149A Blocks in reply to Gary, 09-11-2003 17:10:15

They usually have M & W cast on the inside of the piston or a part number that is cast inside the piston that will identify it as an M & W. What part of the country are you in maybe some one on here has a block and is near you.

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Gary

09-13-2003 06:25:32

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Re: Re: Re: Re: 10A149A Blocks in reply to Bill, 09-12-2003 21:03:33

NW Indiana, near Chicago, thanks

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Phil

09-14-2003 00:21:18

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Re: Re: Re: Re: Re: 10A149A Blocks in reply to Gary, 09-13-2003 06:25:32

Gary,

I have set of blocks that came off my 1948 UTU.. I am pretty sure they are still stock.. or standard bore. Would one of them work for you?? Are they the same as the UB? I will check the casting number for you and see if it is the same.

I pulled these off my Moline 3 or 4 years ago and bought M5 Blocks and M&W high compression pistons. The reason I did that was my pistons were worn out in the ring lands. The gaps the rings sit in were out of tolerance. I could not get spacers to fit. At the time, no one had any aftermarket or NOS pistons sitting around. I could not even find a set of used ones to put in.

These blocks are sitting down in the shop under a bench. I have no plans on using them. I will get the casting number off of them and post it here as well as check the condition of them.

As for my location. I am on the westside of Indianapolis, Indiana.

Phil

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Gary

09-14-2003 10:07:29

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Re: Re: Re: Re: Re: Re: 10A149A Blocks in reply to Phil, 09-14-2003 00:21:18

Hi Phil, Great!! I'm through Indy every couple weeks or so on business. Let me know what you have. Thanks, Gary

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