Author Topic: Metro 12/2 rebuild  (Read 1284 times)

Tanman

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Metro 12/2 rebuild
« on: June 26, 2021, 11:33:57 PM »
Hello everyone, hope you are all doing well. I just picked up my first Listeroid! A 12/2 metro. Upon tearing into it today I noticed that there was some corrosion and strange gew that got into that cylinder and I'm wondering if just cleaning it up and honing it out will do the trick? I'll attach pictures soon. Also, there were mysterious solids in the coolant? Iím thinking someone forgot a paper towel in there or something.
« Last Edit: June 27, 2021, 02:12:14 AM by Tanman »
Kubota ea300
Metro 12/2

38ac

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Re: Metro 12/2 rebuild
« Reply #1 on: June 27, 2021, 12:49:34 PM »
In case you didn't realize it that is a direct injection engine. Most of the upper end parts and the pistons are not interchangeable with the standard pattern engines.

Can't tell a thing about the cylinders in the photos. Clean, hone and inspect for wear and damage. Looks like that engine was run on something other than diesel fuel
« Last Edit: June 27, 2021, 01:07:42 PM by 38ac »
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Re: Metro 12/2 rebuild
« Reply #2 on: June 27, 2021, 11:48:44 PM »

I'd like to see more pics....
Crank, case, rods .....etc.
Just curious against my Ashwamegh.

Thanks

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Tanman

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Re: Metro 12/2 rebuild
« Reply #3 on: June 28, 2021, 03:26:54 AM »
In case you didn't realize it that is a direct injection engine. Most of the upper end parts and the pistons are not interchangeable with the standard pattern engines.

Can't tell a thing about the cylinders in the photos. Clean, hone and inspect for wear and damage. Looks like that engine was run on something other than diesel fuel

That is a bummer, I did measure the cylinder it is the standard diameter, so hopefully I can scrounge up rings if I need them. I'll do what you said and post updates as I go along. I'm also thinking I might weigh the pistons and rods and flywheels and get everything to the same weight. Hopefully that will have some impact on vibration.
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Metro 12/2

Tanman

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Re: Metro 12/2 rebuild
« Reply #4 on: June 28, 2021, 03:28:16 AM »

I'd like to see more pics....
Crank, case, rods .....etc.
Just curious against my Ashwamegh.

Thanks

No problem, I'll post some more pics this week.
Kubota ea300
Metro 12/2

38ac

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Re: Metro 12/2 rebuild
« Reply #5 on: June 28, 2021, 04:08:53 AM »
I should have those rings in stock along with bearings, gaskets sets etc if you have any needs.
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Tanman

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Re: Metro 12/2 rebuild
« Reply #6 on: June 28, 2021, 02:11:59 PM »
I should have those rings in stock along with bearings, gaskets sets etc if you have any needs.

I know Iíll need bearings for sure, the rod bearings have some scratches, so I would assume both of those sets will need to be swapped along with the mains probably.
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Metro 12/2

38ac

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Re: Metro 12/2 rebuild
« Reply #7 on: June 28, 2021, 05:02:56 PM »
The con rod bearings are all the same other than material make up but there are several main bearing combinations. Seldom do the mains need replacing.
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Tanman

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Re: Metro 12/2 rebuild
« Reply #8 on: June 29, 2021, 01:21:20 AM »
The con rod bearings are all the same other than material make up but there are several main bearing combinations. Seldom do the mains need replacing.

Awesome, I probably wonít pull the crank this time then. Just polish the exposed journals. Iíll email you about rod bearings.
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Metro 12/2

Tanman

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Re: Metro 12/2 rebuild
« Reply #9 on: July 02, 2021, 08:33:01 PM »

I'd like to see more pics....
Crank, case, rods .....etc.
Just curious against my Ashwamegh.

Thanks
Kubota ea300
Metro 12/2

Tanman

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Re: Metro 12/2 rebuild
« Reply #10 on: July 03, 2021, 02:45:36 AM »
Question, is this this type of build up on the big rod bearing normal?
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Metro 12/2

veggie

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Re: Metro 12/2 rebuild
« Reply #11 on: July 03, 2021, 07:52:44 PM »
Something looks wrong there.
The babbit appears to be scored (lighter grey material) and the section near the end of the shell (darker grey) looks like it's not contacting the main bearing journal.   ???
« Last Edit: July 03, 2021, 07:54:19 PM by veggie »
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Tanman

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Re: Metro 12/2 rebuild
« Reply #12 on: July 03, 2021, 08:22:05 PM »
Something looks wrong there.
The babbit appears to be scored (lighter grey material) and the section near the end of the shell (darker grey) looks like it's not contacting the main bearing journal.   ???

Itís definitely scored, one of the Babbitt actually had a piece break off. And all of the Babbitt have that darker buildup area on both edges (all four in total) so that means that the rod end and cap are a little to open and not perfect half circles right?
Kubota ea300
Metro 12/2

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Re: Metro 12/2 rebuild
« Reply #13 on: July 03, 2021, 08:22:21 PM »
I think some bearings look like that.

What does the  throw on the crank look like ?

Plasti gauge will help here.

Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

Tanman

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Re: Metro 12/2 rebuild
« Reply #14 on: July 03, 2021, 08:41:35 PM »
I think some bearings look like that.

What does the  throw on the crank look like ?

Plasti gauge will help here.

The crank journal that attaches to has some grooves on it and needs to be sanded/polished. What is the proper plastigage width for these?
Kubota ea300
Metro 12/2