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Old 08 May 2013, 10:41   #1
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Honda gearbox drain screw won't budge..

I've found them bad with Honda's in the past, but all have come out with an impact driver, this one won't budge, and I don't want to wear out the slot any more.

Trying to remove the upper drain screw on a BF30, lower one has previously been replaced with a stainless plug which unscrews fine.

Any tricks to getting these out?

Is this a honda thing? do they do a special tool?
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Old 08 May 2013, 14:11   #2
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Try reversing the impact driver so it tightens it-this will sometimes break corrosion and allow it to move. Rost-off ice may help as well as it'll shrink the screw a fraction.

If that doesn't work,you're probably going to have to drift it round.
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Old 08 May 2013, 14:48   #3
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Raise the leg so its at a decent height to work on. Also ensure the screwdriver blade fits the cross head screw. Stanley or Draper make decent rubber handled screwdrivers with hardened blades, usually just over a foot long. More often than not the wrong size screwdriver is used and it ruins the head of the screw.

If you have locking long nose pliers then clamp a set onto the rubber or plastic handle of the screwdriver. Leaning into the screwdriver, turn it and lever the pliers at the same time. Job done. Renew the drain gasket once it comes off.
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Old 08 May 2013, 15:51   #4
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I usually use the screwdriver end of a wheel hub spanner as one person can hold it steady whilst you get some pressure on it . If not , try doing it when your gearbox is warm .
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Old 10 May 2013, 07:35   #5
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Thanks for the tips

It will not will not move, tried the biggest screwdrives I can find. Reversed the impact driver, used heat. Starting to wear the slot out now, so looks like I'm going to have to carefully drill it out.
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Old 10 May 2013, 07:40   #6
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Try dot punching it and drift it before you try and drill it.
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Old 10 May 2013, 10:40   #7
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Quote:
Originally Posted by Nos4r2 View Post
Try dot punching it and drift it before you try and drill it.
Agreed, with more direct heating and cooling cycles. Heat is your friend.
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