Technical Discussion Topics related to Technical Issues

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Old Jan 26, 2010 | 04:28 PM
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oops

so what would happen if I accidentally left a dowel pin out from between the head and the motor?
Old Jan 26, 2010 | 05:17 PM
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I dont know. Sounds like we should be asking you...
Old Jan 26, 2010 | 06:09 PM
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Originally Posted by spladle160
so what would happen if I accidentally left a dowel pin out from between the head and the motor?
No problem. In my experience, every rebuild job should result in a small pile of leftover parts. Now if you had intentionally left it out, who's to say what the limit to the consequences could be?
Old Jan 26, 2010 | 06:35 PM
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The dowel is there for alignment purposes, so if the head and the cylinder are aligned, I don't think you have a problem. It shouldn't make a difference in sealing.

But if you decide to redo it, you need a new gasket anyway.

Of course if you left it on top of the piston, that's another matter.

Last edited by VTRsurfer; Jan 26, 2010 at 07:02 PM.
Old Jan 26, 2010 | 06:46 PM
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Originally Posted by peterpanic
No problem. In my experience, every rebuild job should result in a small pile of leftover parts.
HAHA I'm often guilty whenever I take **** apart... As for your question I really couldn't say...have you already been running it like that? Hell didn't Edwards run his RC51 with one or two of the engine mounting bolts missing to improve traction?
Old Jan 26, 2010 | 06:57 PM
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I know with some other motors I tend to leave dowel pins out but they are always for alignment purposes while putting them together as long as its aligned and tight I wouldn't for see any issues
Old Jan 26, 2010 | 08:31 PM
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It's aligned and tight but who's to say it wont move as it goes through heat cycling. I have only run it for about thirty seconds, on the plus side it idles and starts great for not having been synced or anything. I guess I have til tuesday to decide if I'm gonna dive back in since I'll be out of town til then. Anyone know if I'll need a new gasket? It's been compressed but shouldn't have been heated much.
Old Jan 26, 2010 | 08:45 PM
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Is it a dowel pin or is it the small tube for the pair system. If it's the pair system part, you need to put it in or you will leak oil into the exhaust.
Old Jan 26, 2010 | 09:02 PM
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hmm, if it's the pair system part I will be very pleased when I take off the head cover, that should be an easy fix.
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