18mm tap, looking for local shop in North VA - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 7 Old 01-11-2011, 04:57 PM Thread Starter
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18mm tap, looking for local shop in North VA

I need to re-thread one of the spark plug holes on my Shadow. I've got a tap & die set, but nothing as large as 18mm. Is there a local shop in Northern Virginia where I might find one? $16 seems to the online price, but I'd really like to find one sooner.

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post #2 of 7 Old 01-11-2011, 07:21 PM
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You can get a spark plug thread tap at just about any auto parts store.

Sometimes, not always, a threaded insert is a better answer than a tap.

If you run the piston to TDC and take a long, thin, strip of rag and stuff into the cylinder you can then proceed without a huge worry relative to 'filings' laying around in the combustion chamber.


PS make sure that your pull the rag out when you're done...






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post #3 of 7 Old 01-11-2011, 08:39 PM
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I think the rag trick would be even more effective if it were slathered with grease before inserting it into the cylinder. A shop vac with a small nozzle held by an assistant would probably help with the cuttings too.
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post #4 of 7 Old 01-11-2011, 09:01 PM Thread Starter
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Quote:
Originally Posted by henerythe8th View Post
You can get a spark plug thread tap at just about any auto parts store.
I wasn't even thinking it could be found at an auto parts store. Panic mode had set in. My sad luck that this plug hole is in a deep well, so I might just have to live with the filings.

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post #5 of 7 Old 01-11-2011, 09:45 PM
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Grease up a thread chaser. It's used with a spark plug tool so a deep well is not a problem. A tap has a tapered end and might "want" to cut new threads.


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post #6 of 7 Old 01-11-2011, 11:06 PM
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If you use a tool that is not specific for spark plug holes, be sure it has the same thread pitch as the spark plug threads...same number of millimeters per thread.

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post #7 of 7 Old 01-12-2011, 01:23 PM Thread Starter
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Well, it's fixed in a way. I was able to find an OEM spark plug tool at the dealership and cranked the hell out of it until it was in. I'm able to back it out and inspect the threads on the new plug and they don't look damaged, just slightly ground. I also got a thread chaser just in case, but I wasn't needed. Good tool to have though.

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