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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Breather Banjo Bolt
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<blockquote data-quote="Magnetoman" data-source="post: 51662" data-attributes="member: 2806"><p>If I'm correctly inferring from this that you don't have much experience with taps and dies this particular repair is <em>not</em> the place to practice your skills. First, you will have to drill the hole to the proper size for the special Heli-coil tap, and it is very easy to drill it at an angle. Slathering the drill bit in grease will trap some of the swarf, but remember a drill bit is designed to push swarf out of the hole and grease will stop this from happening. So grease will gain you something, while also losing you something, in terms of the amount of swarf left behind in your engine. </p><p></p><p>Next, even if the hole is straight it is very easy to start a tap at an angle and just as easy to leave engine-damaging swarf behind despite using grease. Finally, installing the Heli-coil deep enough, but not too deep, and removing the installation tang without screwing things up and so it doesn't wind itself out later also is something a first-timer should get experience with on a less critical job than this one.</p><p></p><p>The right way is to disassemble the engine to do the repair, but I realize most people wouldn't do that. However, ask yourself it you would pay someone to do this to your Vincent who has your level of skill. If your answer is 'yes,' then proceed. Otherwise, you really should find someone with the necessary expertise to do it for you. No matter what, drilling and tapping<em> in situ</em> is the wrong way to do it, so you want someone who has the skills to do it the least wrong way possible.</p></blockquote><p></p>
[QUOTE="Magnetoman, post: 51662, member: 2806"] If I'm correctly inferring from this that you don't have much experience with taps and dies this particular repair is [I]not[/I] the place to practice your skills. First, you will have to drill the hole to the proper size for the special Heli-coil tap, and it is very easy to drill it at an angle. Slathering the drill bit in grease will trap some of the swarf, but remember a drill bit is designed to push swarf out of the hole and grease will stop this from happening. So grease will gain you something, while also losing you something, in terms of the amount of swarf left behind in your engine. Next, even if the hole is straight it is very easy to start a tap at an angle and just as easy to leave engine-damaging swarf behind despite using grease. Finally, installing the Heli-coil deep enough, but not too deep, and removing the installation tang without screwing things up and so it doesn't wind itself out later also is something a first-timer should get experience with on a less critical job than this one. The right way is to disassemble the engine to do the repair, but I realize most people wouldn't do that. However, ask yourself it you would pay someone to do this to your Vincent who has your level of skill. If your answer is 'yes,' then proceed. Otherwise, you really should find someone with the necessary expertise to do it for you. No matter what, drilling and tapping[I] in situ[/I] is the wrong way to do it, so you want someone who has the skills to do it the least wrong way possible. [/QUOTE]
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Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Breather Banjo Bolt
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