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Old 12-04-2012, 07:51 PM
Infinite Monkeys Infinite Monkeys is online now
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Backtap for cross threaded spark plug

Just wondering if anyone has any personal experience with using a backtap to fix a cross thread spark plug hole. I have cast iron heads, not aluminum. I'm concerned that it may not work as well on iron, still not a big deal, I can still pull the head, but compression on all other cylinders is good, so I'm assuming compression on this is also good, just the plug threads need attention.
Or should I just pull the head and tap it from the inside out with a regular tap?
Guess I don't need to explain what I'm trying to fix. It wasn't me, I bought it this way.

Here's a link to what I'm referring to:

Un-Oops That Cross Threaded Spark Plug Hole | Toolmonger

Here's a youtube video:

(try and ignore the awful music)


Last edited by Infinite Monkeys; 12-04-2012 at 08:03 PM.
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