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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Engine » Big Mechanicals: Head, Cyl, Piston, Rod, Crank, Flywheel, Cases, Bearings » Archive through September 02, 2007 » Piston Pin Fitting « Previous Next »

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Bomber
Posted on Saturday, March 24, 2007 - 04:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm in the middle of my 1250 kit install, and have a question for the experts -- the piston pins supplied with the pistons (CP brand) are tight as they can be in the bore -- I received the pistons in their original packaging, with the pins slipped into the bore on one side of the pistion (which makes sense)

I cannot slide the pin any further into the piston by hand (it takes a pretty good wailing with a leather-faced hammer to budge it)

in previous engine builds (non HD), when confronted with this situation, I'd pop the piston/pin assembly into the toaster oven for a bit at about 275 degrees --

so, does the same practice hold for a sporty mill?

thanks for the backup, all!
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Rocketman
Posted on Saturday, March 24, 2007 - 05:31 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Soak it in hot water.

Rocket
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Road_thing
Posted on Sunday, March 25, 2007 - 06:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That could be some kind of British insult, but I'm pretty sure he's referring to the piston, Bomber...

rt
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Pammy
Posted on Monday, March 26, 2007 - 09:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Heat the piston. Heat gun or torch..
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Jimidan
Posted on Wednesday, April 04, 2007 - 04:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What Pammy sez...you don't want water in your rings, etc. Lube it up nicely too...it will feel much better.

jimidan
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Rocketman
Posted on Wednesday, April 04, 2007 - 05:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I wouldn't put rings on a piston before it was sat on the rod with circlips in place. That's just me. Others might do it different.

I have trouble watering my plants, so watering piston rings sounds like a bit of a chore to me

Rocket
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Jimidan
Posted on Friday, April 06, 2007 - 07:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I guess everybody does it differently, but I am now installing the rings on the pistons, and the pistons in the cylinders before I put the pins in...for some reason, I find it easier than trying to deal with a ring compressor around all of those studs.

jimidan
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Rocketman
Posted on Saturday, April 07, 2007 - 06:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Why do you need a ring compressor?

Rocket
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Jimidan
Posted on Sunday, April 08, 2007 - 04:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I know some folks don't use a ring compressor, but I am just handicapped like that. I have tried doing without it before and I couldn't bear trying to work the rings into the cylinder...it sounded like I was destroying them in the process. It is so much slicker with the compressor to me. there is certainly more ways than one to do this.
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Rocketman
Posted on Sunday, April 08, 2007 - 08:31 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ah sorry, just reread your post. You're fitting the rings on the pistons, then putting the tops of the pistons into the cylinders and then putting the pistons and cylinders onto the motor?

As I read it before, I was wondering how you were going to remove the ring compressor if it's anything like the one I use, which is for car use where the piston already attached to the rod goes in from the top.

Rocket
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Bomber
Posted on Tuesday, April 10, 2007 - 10:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Rocket -- dunno bout others, but I've got one that is designed for bikes, so you can get it out from around the con rod -- thing huge hose clamp, and you've got the picture
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Rocketman
Posted on Tuesday, April 10, 2007 - 12:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Nice one. Post a pic sometime please.

Rocket
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Bomber
Posted on Tuesday, April 10, 2007 - 01:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

wilco, sir!
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