Back-Tap™   email            backtap888@yahoo.cn
photo of 10mm back-tap, 12mm Back-tap, 14mm Back-tap, 18mm back-atp

 

%#%&#!!!  Now you've done it.  You've cross threaded your spark plug hole.  Now what?  Do you really want to waste your time pulling the head or risk installing a HeliCoil or some other threaded insert? 

If only you could access the good, clean threads on the bottom of the hole without having to pull the cylinder head......

 

back-tap in cylinder chamber back-tap mandrel and threads
 

Well now you can!  The Back-Tap's patented collapsible design allows it to engage the good threads by sliding down past the spark plug hole threads into in the chamber.  A mandrel is then drawn back, expanding the tool's threaded area and allowing you to get a good start on clean threads.  The damaged threads will be gently straightened out and all debris and filings will stick to the Back-Tap, coming up and out instead of falling into the chamber.  Why spend hours pulling the cylinder head when you can use the Back-Tap and be done in minutes?

 

 

 

 

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