Yanmar connecting rod replacement

[clemsonfor]

You're lucky!

Here it feels like the end of the world. That the climate change disaster just hit us headon. These news photos - 50 miles apart - represent all of Northern California while the Camp Fire burns 150 miles north of us. 42 dead so far and sure to be more found. No rain since Easter, none forecast, just low humidity and high winds returning to where this fire began. Breathing here feels like when you use too much Clorox cleaning the shower. I read that Sacramento is handing out particulate masks, the same ones firefighters use, free at all firehouses. There's no place to get away from it.

Southern California is similar, and with the celebrities down there it probably gets more news coverage. I read a quarter million people were under evacuation orders there at one point.

"May you live in interesting times".

No rain since easter!!! :drink:id gladly give you some. We probably had more than 3 inches this week! A few before that and a few before that. Woods are geting to be a mess, loggers are struggking to find logable ground. Hopefully the price of my tracks sell good in the next few weeks. Im selling sand land tracks or all weather. Basically.

 

[bridgeport13b]

I don't think any of the English service manuals cover the 88mm version (2tr20). Your service manual is for the 90mm version (2tr20A). If you swap the pistons, sleeves, and head gasket together you can use either size in that engine.

Just use the wear limits as the guide and ignore the 88 or 90mm part. For example, according to the service manual, the wear limit for the 84mm engine's piston is 83.8. The wear limit for the 90mm is 89.8. So... it makes sense that the wear limit for the 88mm would be 87.8.

So I just got the piston to bore clearance and the front piston to bore top is .008, center is .0066, bottom is .0056 the rear piston to bore top is .0092, center is .008, and bottom is .0074 so I am within the worn spec. Should I just re-ring it and do a light hone?

 

[bridgeport13b]

So I just got the piston to bore clearance and the front piston to bore top is .008, center is .0066, bottom is .0056 the rear piston to bore top is .0092, center is .008, and bottom is .0074 so I am within the worn spec. Should I just re-ring it and do a light hone?

Do non U.S. 2tr20a engines have 88mm bores? I though all the 2tr20a have 90mm just stumped as to why I have 88mm.

 

[clemsonfor]

Do non U.S. 2tr20a engines have 88mm bores? I though all the 2tr20a have 90mm just stumped as to why I have 88mm.

According to Aaron , like he said if you swap it all, head, gasket, liners and pistons you can put 88 in a 90 engine. Who knows what was done to it before it got crammed in a container and sent over here?:confused3:

 

[bridgeport13b]

Here is link to some more pictures. https://imgur.com/a/OenSHGu

 

[winston1]

So I just got the piston to bore clearance and the front piston to bore top is .008, center is .0066, bottom is .0056 the rear piston to bore top is .0092, center is .008, and bottom is .0074 so I am within the worn spec. Should I just re-ring it and do a light hone?

For what it's worth that is what I would do.

 

[bridgeport13b]

For what it's worth that is what I would do.

Based on the numbers I have .0024 taper on rear and .0018 taper on front which is it horrible but pistons are a little loose but it痴 not a big deal. I知 going to re-ring it and fix bearings.

 

[bridgeport13b]

I was think that I may just buy oversized pistons from hoyetractor and just hone my sleeves for next size

 

[HoyeTractor]

I was think that I may just buy oversized pistons

They don't make oversize pistons for the models with sleeves.

 

[normde2001]

Do non U.S. 2tr20a engines have 88mm bores? I though all the 2tr20a have 90mm just stumped as to why I have 88mm.

Is that by chance a Vietnam recon tractor? We used to read stories about them rebuilding with whatever they had on hand and later parts replacement did not match up. Did it look like it had been apart before, or do you know any history?