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H3 160 cu in gas engine build
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OldSchoolRecovery View Drop Down
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Joined: 06 Nov 2015
Location: Eagle River, WI
Points: 301 		Post Options Post Options   Thanks (0) Thanks(0)   Quote OldSchoolRecovery Quote  Post ReplyReply Direct Link To This Post Posted: 25 May 2016 at 12:03am
Originally posted by Brad in WA Brad in WA wrote:

149 has orings on the sleeves, 160 has them in the block, sleeves will not interchange.

Thats why the sleeve/piston set is $700 more than the 138, 149 motor.

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DMiller View Drop Down
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Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 33728 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 25 May 2016 at 12:16pm
I would dress the threaded area up, smooth off the broken edges and check for cracking into the bolt boss but would not attempt to weld or fill that spot, if need be I would drill and add a KEENSERT to the bolting threads for strength.
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OldSchoolRecovery View Drop Down
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Joined: 06 Nov 2015
Location: Eagle River, WI
Points: 301 		Post Options Post Options   Thanks (0) Thanks(0)   Quote OldSchoolRecovery Quote  Post ReplyReply Direct Link To This Post Posted: 26 May 2016 at 12:40am
Crank came back bad. Cracked.

Rethinking project until fall,

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Kevin in WA View Drop Down
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Joined: 08 Feb 2010
Location: Lynden, WA
Points: 612 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Kevin in WA Quote  Post ReplyReply Direct Link To This Post Posted: 26 May 2016 at 9:57am
Actually the 138 149 and 160 all have oring grooves in the block, but the 160 block has a larger counterbore, so they won't interchange, 160 also has larger wrist pins and are full floating.
125 engines have oring grooves on the sleeve.
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