Bloody pin seized in caliper..

[Vincefox]

Ah, now that I can't help you with.

Heat, plusgas, good grippers and patience can help. Good luck!

[WarnieV6GT]

At work until 4.30pm then it's a quick 30 min dash to the Honda Dealership in Sutton Coldfield before they close to get the pin.

Some have suggested applying some heat, I presume that's with a heat gun? of which I don't have so is there anything else I could use.

[Vincefox]

small gas canister blowtorch. Essential bit of kit. Alternate between this and plusgas. Also, impact helps. If you have a centre punch or similar and a hefty hammer, hitting the head of the pin repeatedly, then heat, then plusgas. Rinse and repeat. It really is a patience game i'm afraid. If you have easy-outs I'd consider them if you're confident.

[WarnieV6GT]

Vincefox said:

small gas canister blowtorch. Essential bit of kit. Alternate between this and plusgas. Also, impact helps. If you have a centre punch or similar and a hefty hammer, hitting the head of the pin repeatedly, then heat, then plusgas. Rinse and repeat. It really is a patience game i'm afraid. If you have easy-outs I'd consider them if you're confident.

Thanks again Vince

Looks like a trip to stax or screwfix in the morning. I have easy outs but have never used them before so I'll use them as a last resort.

End game will be caliper ripped off and chucked against the garage wall

[Dog Star]

Drill it out and helicoil the thread back in. The pin is holding nothing but itself, so it’s not a safety issue.

[bgunn]

WarnieV6GT said:

Thanks again Vince

Looks like a trip to stax or screwfix in the morning. I have easy outs but have never used them before so I'll use them as a last resort.

End game will be caliper ripped off and chucked against the garage wall

Do NOT consider an easy out. They are anything but - the force you'll be applying to drive the easy out makes the thread grip harder, then they shatter being very hard, then you need to spark erode them out.

If the thread is thoroughly mullered and the pin not removable, drilling out the pin with the caliper on the bench and helicoil is definitely the right way to fix.

[WarnieV6GT]

bgunn said:

Do NOT consider an easy out. They are anything but - the force you'll be applying to drive the easy out makes the thread grip harder, then they shatter being very hard, then you need to spark erode them out.

If the thread is thoroughly mullered and the pin not removable, drilling out the pin with the caliper on the bench and helicoil is definitely the right way to fix.

cheers

"off to google what helicoil is"

[cmaguire]

If you drill it out perfectly true with a drill smaller than the thread it isn't uncommon for the bolt (or hopefully pin in this case) to loosen off because what is left has lost its structural integrity, allowing you to remove with the thread intact.

I've drilled out 8mm bolts using a 6/6.5 drill like this.

[bgunn]

cmaguire said:

If you drill it out perfectly true with a drill smaller than the thread it isn't uncommon for the bolt (or hopefully pin in this case) to loosen off because what is left has lost its structural integrity, allowing you to remove with the thread intact.

I've drilled out 8mm bolts using a 6/6.5 drill like this.

Agreed, the pin will be pretty soft so if you're careful you'll not damage the thread and can probably end up using a tap to clean the thread.

As said, it's holding a pin, so doesn't need to hold much more than 5lb/ft of torque..

[Gunk]

Personally, I wouldn’t attempt it myself. Remove the the calliper, pop it in to a local engineering shop and they’ll have the pin out in minutes.

[gareth_r]

I don't think I would attempt to drill it out if I didn't have a pillar drill.

[Burnzyb]

I once drilled a mates spark plug out on his rover bubble cylinder head on my lap managed to get it good enough then finished it off with a hacksaw blade and picked out the last of the plug, continued on with a happy life long after too.

You’ll be fine to drill it by hand, just start small and be steady, watch what your drilling and make sure your not lightening the caliper and you’ll have it out by no time

[WarnieV6GT]

Made the 30 min trip earlier after work to the Honda dealership only to find out they had ordered the wrong bloody pin!!

Oh well....

[PurpleTurtle]

OP, if all else fails then a good condition used Hornet caliper off a breaker looks to be about 45 quid on eBay, a relatively cheap solution to time-consuming faffing.

[010101]

You could try a tiny chisel on the face of the pin. Chisel a groove with lots of little anti clockwise taps with a small hammer.

[WarnieV6GT]

So I bought a blow torch and various other tools put the shelf with the plusgas on was empty...typical

I've heated it many times, used mole grips and wd40 for what it's worth and hammered in torx bits, but nothing was working. I then decided to use a small drill to try and break it down and eventually the bottom half of the pin broke off releasing the pads.

But..the screw part was still jammed in the caliper. So I used a bigger 5mm drill bit and then a 6mm. The pictures below are what I'm left with.

Shall I just use a 7mm bit and drill the rest out or is there a chance that I can remove it and save the thread??

[010101]

The tapping drill for m8 x 1.25 is 6.8mm

Possibly use a 6.5 to remove remains of the pin.

[Biker's Nemesis]

That bit should just turn out with a screwdriver now,

[cmaguire]

Or a stud extractor

[WarnieV6GT]

010101 said:

The tapping drill for m8 x 1.25 is 6.8mm

Possibly use a 6.5 to remove remains of the pin.

Cheers, so 6.5mm max if it doesn't come out with a screwdriver which it doesn't seem to want to at the minute.