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Re-threading The Spark Plug Hole

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Old Aug 12, 2003 | 07:42 PM
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Ok so I have to fix a small problem on someone's car (Not Mine, I Swear) they have a fucked up hole and the plug won't go in straight.

I've tapped and heli-coiled tons of piston engines, and never gave much thought about any tiny metal shavings left in the combustion chamber. SO

If you did it what method did you use to extract the shavings? Also, what thread size are the plugs? I gotta drive 25 miles to go do this, I want to be prepared!
Old Aug 12, 2003 | 07:55 PM
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Damn that blows, I wouldn't want to have to do that one. Which plug trailing or leading? Not sure how you are going to get the metal out, the plug holes are pretty small.







I am sending that strut bar tomorrow
Old Aug 12, 2003 | 08:00 PM
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grease on the tap? good luck and be careful



mike
Old Aug 12, 2003 | 08:18 PM
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It's L1 , so front bottom. no room to work, this is going to be fun
Old Aug 12, 2003 | 09:51 PM
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Like mike said,The gease will collect most of the shavings.Its on a rotary?
Old Aug 12, 2003 | 09:57 PM
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Originally Posted by Racer X' date='Aug 12 2003, 09:51 PM
Like mike said,The gease will collect most of the shavings.Its on a rotary?
yep, an FD
Old Aug 12, 2003 | 10:00 PM
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yes it is rotary, leading 1 plug hole.



Maybe a vaccum? If you move the rotor so the apex seal is a little below the plug hole you might beable to remove what ever goes in the housing.
Old Aug 12, 2003 | 10:08 PM
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Yea use a vacuum then compressed air...
Old Aug 13, 2003 | 08:27 AM
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Ya exactly. You can use a vacuum by putting the hose right over the hole when your done cutting. A shot of compressed air after that is not a bad idea either. But first as I think toddp31 mentioned you would want to bring that rotor around and have it sit with one of the apex seals just under the leading plug hole. If you do it like this you should be able to vacuum it then blow it out through the trailing plug hole.
Old Aug 13, 2003 | 04:22 PM
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Somewhere in my snap-off box I have a compression tester set. The hoses have quick disconnects that will attach to a air line. I have had to do this twice. I cleanup the hole, but the tester hose in the trailing hole and attach the shop air line.



The comment above about aligning the apex to just under the sparkplug hole will help as well.





hope this helps...



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