Guide pin bolt?

[antnee]

Just looking in my haynes manual (for mk3 golf) to see whats involved with changing disks and pads. I noticed it says to release the calipers to change the pads you need to undo the guide pin bolt at the bottom of the caliper and then a new one must be used.

Any ideas what this guide pin bolt it like? Want to get them before I start

 

[Reuvers]

hmm don't know about that...

For the cupra its 2 regular bolts that hold the calliper. if i remember correctly you need a 14 or 13mm allen tool and a spanner 1 size bigger to counter hold the bolt and then you get off the calliper.
Disc is held on by your 4 hub nuts and then one small 'safety' bolt near the centre, that keeps the disc aligned to put rim back on.

 

[antnee]

Just thought, as I will be doing the disks at the same time, I should be able to take the caliper off the hub, and change the pads while the caliper is still in the mounting bracket

 

[antnee]

 

[Reuvers]

the picture shows exactly what I said that you need to hold the bolt to ensure it not rotating.

these bolts are smooth, because they allow your calliper to shift on the carrier when you brake and when pads/discs wear.
But I have never before heard you need to change them. I never have, and don't know others who have.

guess its up to you though...

FYI: You'll also need a large 'waterpump plier' (what we call it in Dutch, used to tighten water pipes in and around the house) to push your piston back in. The old pads and discs will be worn more than the new ones, so they won't fit before you push piston back

 

[antnee]

ok, nice one. My dad has plenty of plumbing tools I can use

 

[robreidmotors]

ive just cleaned up my caliper pins, before i did it i bought four sets from the ford garage. to be honest i didnt use the new ones as they were in very good as new condition, my advice with them is just wd40 them and the hole they sit in, should be fine after that.

if you do need some pins let me know, i have four sets of the blighters!

you do need to put grease on the caliper bolts though, just a little, youll see traces of the old grease, and it isnt copper grease its another type.

 

[Reuvers]

but I really wouldn't use wd40. these pins need to glide properly. wd40 won't do that. It dries up quickly, is actually a de-greasant and can't handle heat.
If you want to lube them then possibly copper grease, as regular grease will wash/burn off easily imo.

 

[robreidmotors]

Not copper grease, wrecks the rubber.

Looks like i will have another job then, apparently synthetic grease is the way forward.

 

[Reuvers]

have to say though that even that guy from wheeler dealers on Discovery uses copper grease to grease those pins, whilst he was working on a old Lancia delta integrale....

 

[robreidmotors]

I read that it wrecks the rubber? I dont know if its true or not but ill be getting some synthetic grease.

 

[robreidmotors]

Im reading on some forums you dont need to grease the pins? Anyone know what VW say on this? says something about a ptfe insert?

 

[Fl@pper]

i stick to the synthetic clear stuff as copper just gunks up too easy and last 5 mins but does the same job

the bolts are thread locked iirc and vw supply em new already coated which is probably why it's suggesting replacement

just clean off the threads and threadlock em fresh

 

[robreidmotors]

which synthetic stuff do you recommend? and where from?

 

[Fl@pper]

alwasy used the stuff that came with the ford pins in the kit - got a tube of it off local techie - i'll get the part number later

Motorcraft Silicone Caliper Pin Grease and some code but never read it closely enough to memorise it

 

[Reuvers]

it's true that copper grease is not advised on your topmounts as well as the rubbers there apparently could be wrecked.

not sure how much of that is true though.

but as said use synthetic then.