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Author Topic: Front caliper mounting bolt size  (Read 1027 times)

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GastronomicKleptomaniac

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Front caliper mounting bolt size
« on: 04 August 2022, 20:10:30 »
Having just had a brown trouser moment, I'm now in need of a front caliper mounting bolt.

What size are they, thread and length?

And anywhere in Norfolk/ Suffolk recommended to get a new one tomorrow? If a standard size then I can head to Screwfix but I'd prefer a fastener shop...

No, I'm not happy, I don't know if I've left it loose or if something has gone wrong. Either way I'll be crawling about check every single bolt tomorrow. Live and learn!
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GastronomicKleptomaniac

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Re: Front caliper mounting bolt size
« Reply #1 on: 04 August 2022, 20:35:24 »
Update - having searched the forum I've found the answer is M12x40mm.

State of underpants... Still questionable.
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LC0112G

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Re: Front caliper mounting bolt size
« Reply #2 on: 05 August 2022, 09:44:22 »
Quote from: GastronomicKleptomaniac on 04 August 2022, 20:35:24
Update - having searched the forum I've found the answer is M12x40mm.

State of underpants... Still questionable.

Most of these sort of bolts are "metric fine" thread on Vauxhalls. That's not the normal thread, and you'll be lucky if your local bolt shop carries them.
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johnnydog

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Re: Front caliper mounting bolt size
« Reply #3 on: 05 August 2022, 10:34:36 »
If you are struggling, I can whip one off a scrapper I have, and pop it in the post today.....
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GastronomicKleptomaniac

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Re: Front caliper mounting bolt size
« Reply #4 on: 05 August 2022, 10:57:42 »
Got sorted but thanks for the offer! :Ay
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Doctor Gollum

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Re: Front caliper mounting bolt size
« Reply #5 on: 05 August 2022, 11:17:50 »
Did a similar thing on my first Granada. Forgot to bend a lock tab back over.

Braking for a roundabout, loud clunk and sudden loss of brakes on one side later...

No harm, no foul :y
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GastronomicKleptomaniac

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Re: Front caliper mounting bolt size
« Reply #6 on: 05 August 2022, 12:06:19 »
Quote from: Doctor Gollum on 05 August 2022, 11:17:50
Did a similar thing on my first Granada. Forgot to bend a lock tab back over.

Braking for a roundabout, loud clunk and sudden loss of brakes on one side later...

No harm, no foul :y

Suffice to say the local constabulary will be getting some cakes as a thank you for helping us get it clear of the dual carriageway... :y

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Enceladus

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Re: Front caliper mounting bolt size
« Reply #7 on: 06 August 2022, 11:57:10 »
Quote from: LC0112G on 05 August 2022, 09:44:22
Quote from: GastronomicKleptomaniac on 04 August 2022, 20:35:24
Update - having searched the forum I've found the answer is M12x40mm.

State of underpants... Still questionable.

Most of these sort of bolts are "metric fine" thread on Vauxhalls. That's not the normal thread, and you'll be lucky if your local bolt shop carries them.
The M12 x 40 screws are standard metric pitch, ie 1.75mm. Perhaps you didn't re-torque the missing bolt when last refitted?
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GastronomicKleptomaniac

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Re: Front caliper mounting bolt size
« Reply #8 on: 06 August 2022, 18:44:14 »
Quote from: Enceladus on 06 August 2022, 11:57:10
Quote from: LC0112G on 05 August 2022, 09:44:22
Quote from: GastronomicKleptomaniac on 04 August 2022, 20:35:24
Update - having searched the forum I've found the answer is M12x40mm.

State of underpants... Still questionable.

Most of these sort of bolts are "metric fine" thread on Vauxhalls. That's not the normal thread, and you'll be lucky if your local bolt shop carries them.
The M12 x 40 screws are standard metric pitch, ie 1.75mm. Perhaps you didn't re-torque the missing bolt when last refitted?

I don't think there's any "perhaps" about it.

I mean even after 5 years, MrsGK wouldn't stoop to that level of sabotage... I don't.. think...
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