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Zen and the Art of reverse automotive engineering

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Bitch Pin

Posted by Mad Scientist on March 3, 2008

Tales are told around the campfire on moonless nights about the dreaded bitch pin. If you haven’t heard of this terrible monster before, gather ’round and I’ll tell you about it.

There will come a day when you find that your engine must come out of your car, and while your breaker bar will get those motor mounts, and your old rotting rubber hoses can be cut and replaced, the bitch pin is there to stay. Every swap is fraught with danger, but none so great as the bitch pin. It’s an impossible hydra-like beast, meaning every time you hit it it gets stronger and embeds itself further. You may find that perfect punch and a big mini-sledge, but the bitch pin still refuses to move. Never fear, though! This bitch pin has a great weakness to be exploited.

Bitch Pin

After I had already screwed my bitch pin into a pulp of metal that refuses to move, I looked around on the internet to find that everybody else just whacked it with a hammer. Eventually it’ll come out, right?

Wrong. Actually, using physics for dynamic force and using only enough pressure to move it is the key. Experimenting with a c-clamp and a wooden dowel yielded positive results, but I came across a better way. This article gives nice pictures and a good walkthrough of what needs to be done:

bitch pin removal

Add this “bitch pin removal kit” to the budget of any swap you tackle.

  1. C-clamp
  2. sockets (deep and shallow) that fit the bitch pin inside
  3. small drill bit set (for putting pressure on the bitch pin itself)

One Response to “Bitch Pin”

  1. jordan_myers Says:

    Thanks for the write up and link…Good god, you’re right this bitch pin is a strong monster. I’m just glad that I’m not the only one who has struggled with this little prick…Props for all of your help now and in the past.

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