Seized bolt advice needed
Moderator: RichardW
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Seized bolt advice needed
I don't normally have much difficulty freeing bolts like this, the impact driver normally wins but not this time.
It's a Torx30 bolt on the injection pump I'm currently dismantling.
I've left penetrating oil soaking overnight from the back of the thread though there's no sign of it being seized through corrosion. Normally I would perservere with the impact driver but it's deforming and destroying the biting points internally rounding it off.
Any other tricks I can try before I ruin it completely?
It's a Torx30 bolt on the injection pump I'm currently dismantling.
I've left penetrating oil soaking overnight from the back of the thread though there's no sign of it being seized through corrosion. Normally I would perservere with the impact driver but it's deforming and destroying the biting points internally rounding it off.
Any other tricks I can try before I ruin it completely?
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Have you tried to tighten it?..... this will save you damaging the loosening biting points & may just crack it off from its seized position.
Another way is to use your torx bit in a spanner & whilst holding pressure on the spanner in a loosening direction tap the base of the torx bit with a hammer....keep holding the pressure on whilst repeatedly tapping the torx bit...this sometimes works.
Good luck.
Another way is to use your torx bit in a spanner & whilst holding pressure on the spanner in a loosening direction tap the base of the torx bit with a hammer....keep holding the pressure on whilst repeatedly tapping the torx bit...this sometimes works.
Good luck.
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2001 Xsara II 1.4 LX
2001 Renault Laguna II 1.9dCi Sport Tourer
2001 Xsara II 1.4 LX
2001 Renault Laguna II 1.9dCi Sport Tourer
I would try the above too. In the workshop I would use an impact gun , not much resists that !!
Now using '00 Xantia LX HDI, pov spec
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'00 Xantia SX HDI, now dead due to accident
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& a couple of Peugeots !
My past Citroens :-
'00 Xantia SX HDI, now dead due to accident
'99 Xantia HDI 110 Exclusive, RIP
'97 Xantia TD SX
'96 Xantia TD LX
'96 ZX TD
'89 BX TD
'88 AX GT
'79 CX2400 Pallas (scrapped )
& a couple of Peugeots !
- CitroJim
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Those can be frightfully (or should that be frighteningly?) tight Mike.
I use a Torx bit (good quality one) in a little 3/8" breaker bar to undo them and hear a satisfying crack as they let go.
I use a Torx bit (good quality one) in a little 3/8" breaker bar to undo them and hear a satisfying crack as they let go.
Jim
Runner, cyclist, time triallist, duathlete, Citroen AX fan and the CCC Citroenian 'From A to Z' Columnist...
Runner, cyclist, time triallist, duathlete, Citroen AX fan and the CCC Citroenian 'From A to Z' Columnist...
i would resist hitting it to hard as you migh fracture the caseing, its only cast alloy,
i do sometimes find with Torx bits you think its one size, but when it feels like its going to strip the splinse, you find it turns out to be the next size up,
otherwise can you get a small chizle at the side of the head to drift it loose,
regards malcolm
i do sometimes find with Torx bits you think its one size, but when it feels like its going to strip the splinse, you find it turns out to be the next size up,
otherwise can you get a small chizle at the side of the head to drift it loose,
regards malcolm
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That would not help, I guess, because the idea of the freezing spray is to cause a sudden temperature drop in screw while the larger body stays almost in the same temperature as before. Shrinking will loosen the grip.MikeT wrote: I suppose I can stick it in the freezer?
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Slot is now cut though not so well where the head is flush (unless I risk cutting into the body a mm or so)... I tried an impact bit in place and looks like it might work. I also removed the other bolt and tapped the housing so it swivelled back and forth slightly so at least I know it's free under the bolt shoulder then reinserted and retightened that bolt to take some of the levered pressure off.
I'll see if I can spray freeze the bolt head - should I also heat the surrounding body to amplify the temperature difference?
I'll see if I can spray freeze the bolt head - should I also heat the surrounding body to amplify the temperature difference?
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What I've done with a rounded off torx bit before is hammer a slightly bigger tool into it since the bolt heads are usually pretty soft. Triple square (12 pointed star) bits are pretty good for getting more torque through the little buggers.
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previously:
Citroen ZX Volcane - RIP
Peugeot 106 XN... stolen and destroyed by Kent Police