Ym220 with low compression

Car Doc · Jul 19, 2013

From what I see the cyls/liners are probably useable? I would cut the ridge and like Winston mentioned I much prefer a dingle ball hone fact ring manufacturers recommend them and you might put 3 new pistons in if the cyl that had the broke rings didn't wear excessively they will wear a cyl out in no time when the pieces are just floating around.

peatpatrick · Jul 19, 2013

Thanks for the help gentlemen, I appreciate it more then you know. I'm going to continue checking things out and get some measurements going. I'll update when I know something.

Car Doc · Jul 22, 2013

winston1 said:
As Cardoc has advised before he prefers a dingle berry hone if one is available. Might read his post #s17 and 18 in this thread explaining why. http://www.tractorbynet.com/forums/yanmar/281240-ym-1700-head-gasket-2.html

Got to thinking about it Cardoc. I am hoping you understand I am just repecting your advice and passing it on. Hope you don't mind.

No problem anytime Winston feel free. In fact thanks for passing that along I didn't even see the thread for awhile. Anything I know is passed along freely so use it anyway you feel like that's why I post the info the way I do. thanks :thumbsup:

peatpatrick · Mar 26, 2015

Update....
Okay so I'm finally able to work on this project again.

After further inspection of my cylinder liners I decided to replace them all. After covering the crank with some plastic and then a wet rag, I welded four vertical lines starting at the bottom of the cylinder liners and moved towards the top, this shrunk the liner enough that i could pretty much pull it out by hand. Once I got started I think I go them out in about 30 minutes. I got new liners and rings from Hoye and those are all installed now. I lapped the valves just for good measure. My head is flat as best as I can tell and there was no signs that the previous gasket had any leaks.
New Problem.....
Yesterday I snapped one of the smaller head bolts..... like an idiot...... I forgot to oil them first:ashamed:. It also got me thinking that maybe I had some bad info on the torque specs. Does anyone have those? I haven't seen the specs for this particular model (my220d).
Thanks
any advice is welcome!

winston1 · Mar 26, 2015

Head bolts 29,58,72-79 ft lbs. Cylinder head assist bolts 22 ft lbs. Rod caps 32.4-36 ft lbs. valves .008"

peatpatrick · Mar 26, 2015

Thanks Winston! i just got on here again to say I found it in one of your previous posts. I decided to be more specific in my search and found it here.
http://www.tractorbynet.com/forums/yanmar/272161-john-deere-750-torque-specs.html

peatpatrick · Apr 17, 2015

So I discovered that Three of the head bolts have no gasket around them which exposes them to coolant. I snapped one while trying to get them up to torque and that's when I realized they have a weird waist / thinner area in them. I ordered replacements for all three. I've lost a few weeks just getting that sorted out.