Brake Disc Screws Rusted 987.1 2.7L
Discussion
If you haven’t got an impact driver :
https://www.amazon.co.uk/Silverline-427633-Impact-...
and don’t want to purchase one, use this bush fix :
Use a nice sharp centre punch close (ish) to the outer radius, make a light punch mark, then angle the centre punch in this mark pointing in the direction you want to undo the screw, and hit it hard.
They normally slacken after the first couple of blows, but if not, keep going until the punch hole breaks into the crosshead slot, then do the same on the opposite side of the screw.
Edit to add YouTube link :
https://m.youtube.com/watch?v=gZUbKwduFNI
I was taught that before attempting to undo the retaining screws, you should use the correct size screwdriver/hex driver etc, and place it into the crosshead/hex of the retaining screw, and then hit the end of the driver/screwdriver hard with a hammer, this to jar the threads to make unscrewing the screws easier (and to ensure the driver is properly located in the head of the screw)
Not particularly good for your screwdriver handles, but it’s never failed me !!
https://www.amazon.co.uk/Silverline-427633-Impact-...
and don’t want to purchase one, use this bush fix :
Use a nice sharp centre punch close (ish) to the outer radius, make a light punch mark, then angle the centre punch in this mark pointing in the direction you want to undo the screw, and hit it hard.
They normally slacken after the first couple of blows, but if not, keep going until the punch hole breaks into the crosshead slot, then do the same on the opposite side of the screw.
Edit to add YouTube link :
https://m.youtube.com/watch?v=gZUbKwduFNI
I was taught that before attempting to undo the retaining screws, you should use the correct size screwdriver/hex driver etc, and place it into the crosshead/hex of the retaining screw, and then hit the end of the driver/screwdriver hard with a hammer, this to jar the threads to make unscrewing the screws easier (and to ensure the driver is properly located in the head of the screw)
Not particularly good for your screwdriver handles, but it’s never failed me !!
Edited by Slippydiff on Saturday 30th May 17:03
Edited by Slippydiff on Saturday 30th May 17:08
Slippydiff said:
If you haven’t got an impact driver :
https://www.amazon.co.uk/Silverline-427633-Impact-...
and don’t want to purchase one, use this bush fix :
Use a nice sharp centre punch close (ish) to the outer radius, make a light punch mark, then angle the centre punch in this mark pointing in the direction you want to undo the screw, and hit it hard.
They normally slacken after the first couple of blows, but if not, keep going until the punch hole breaks into the crosshead slot, then do the same on the opposite side of the screw.
I don't have an impact driver but I have a DeWalt hammer drill and impact wrench (both 18v) so i suppose I could buy one... just never had a use for one before. How would an impact driver help when the head of the screws are stripped / will strip before the screw turns?https://www.amazon.co.uk/Silverline-427633-Impact-...
and don’t want to purchase one, use this bush fix :
Use a nice sharp centre punch close (ish) to the outer radius, make a light punch mark, then angle the centre punch in this mark pointing in the direction you want to undo the screw, and hit it hard.
They normally slacken after the first couple of blows, but if not, keep going until the punch hole breaks into the crosshead slot, then do the same on the opposite side of the screw.
RobXjcoupe said:
If stripped and rusted, just drill the head off the screw
I could do this, but then i'd be left with the rest of the screw inside the threaded hole. I want to be able to use new screwsmagycks said:
Slippydiff said:
If you haven’t got an impact driver :
https://www.amazon.co.uk/Silverline-427633-Impact-...
and don’t want to purchase one, use this bush fix :
Use a nice sharp centre punch close (ish) to the outer radius, make a light punch mark, then angle the centre punch in this mark pointing in the direction you want to undo the screw, and hit it hard.
They normally slacken after the first couple of blows, but if not, keep going until the punch hole breaks into the crosshead slot, then do the same on the opposite side of the screw.
I don't have an impact driver but I have a DeWalt hammer drill and impact wrench (both 18v) so i suppose I could buy one... just never had a use for one before. How would an impact driver help when the head of the screws are stripped / will strip before the screw turns?https://www.amazon.co.uk/Silverline-427633-Impact-...
and don’t want to purchase one, use this bush fix :
Use a nice sharp centre punch close (ish) to the outer radius, make a light punch mark, then angle the centre punch in this mark pointing in the direction you want to undo the screw, and hit it hard.
They normally slacken after the first couple of blows, but if not, keep going until the punch hole breaks into the crosshead slot, then do the same on the opposite side of the screw.
RobXjcoupe said:
If stripped and rusted, just drill the head off the screw
I could do this, but then i'd be left with the rest of the screw inside the threaded hole. I want to be able to use new screwsmagycks said:
Slippydiff said:
If you haven’t got an impact driver :
https://www.amazon.co.uk/Silverline-427633-Impact-...
and don’t want to purchase one, use this bush fix :
Use a nice sharp centre punch close (ish) to the outer radius, make a light punch mark, then angle the centre punch in this mark pointing in the direction you want to undo the screw, and hit it hard.
They normally slacken after the first couple of blows, but if not, keep going until the punch hole breaks into the crosshead slot, then do the same on the opposite side of the screw.
I don't have an impact driver but I have a DeWalt hammer drill and impact wrench (both 18v) so i suppose I could buy one... just never had a use for one before. How would an impact driver help when the head of the screws are stripped / will strip before the screw turns?https://www.amazon.co.uk/Silverline-427633-Impact-...
and don’t want to purchase one, use this bush fix :
Use a nice sharp centre punch close (ish) to the outer radius, make a light punch mark, then angle the centre punch in this mark pointing in the direction you want to undo the screw, and hit it hard.
They normally slacken after the first couple of blows, but if not, keep going until the punch hole breaks into the crosshead slot, then do the same on the opposite side of the screw.
RobXjcoupe said:
If stripped and rusted, just drill the head off the screw
I could do this, but then i'd be left with the rest of the screw inside the threaded hole. I want to be able to use new screwshttps://youtu.be/i39N-LukmQo?t=697
He should really be using a punch with a sharper tip :
https://www.drapertools.com/product/10750/5mm-x-10...
I've yet to be defeated using this method ...
magycks said:
Slippydiff said:
If you haven’t got an impact driver :
https://www.amazon.co.uk/Silverline-427633-Impact-...
and don’t want to purchase one, use this bush fix :
Use a nice sharp centre punch close (ish) to the outer radius, make a light punch mark, then angle the centre punch in this mark pointing in the direction you want to undo the screw, and hit it hard.
They normally slacken after the first couple of blows, but if not, keep going until the punch hole breaks into the crosshead slot, then do the same on the opposite side of the screw.
I don't have an impact driver but I have a DeWalt hammer drill and impact wrench (both 18v) so i suppose I could buy one... just never had a use for one before. How would an impact driver help when the head of the screws are stripped / will strip before the screw turns?https://www.amazon.co.uk/Silverline-427633-Impact-...
and don’t want to purchase one, use this bush fix :
Use a nice sharp centre punch close (ish) to the outer radius, make a light punch mark, then angle the centre punch in this mark pointing in the direction you want to undo the screw, and hit it hard.
They normally slacken after the first couple of blows, but if not, keep going until the punch hole breaks into the crosshead slot, then do the same on the opposite side of the screw.
As long as the head hasn't been totally butchered, an impact driver will often shift a stubborn screw, but using a centre punch is cheaper and every bit as effective in my experience.
https://www.youtube.com/watch?v=Og0wilzMtXY
Edited by Slippydiff on Saturday 30th May 21:07
I had the same issue when I swapped my front disks. The screw heads stripped and I ended up using a combination of a screw extraction set (basically a counterclockwise thread that bites and hopefully turns the screw) and, for a couple of them, having to drill out the head as others have suggested. If you do the drilling I would recommend starting with the smallest bit you have and gradually go up in size to avoid hitting the thread on the hub. If you are having trouble with the screws the long pin that holds the pads in is also likely to give you some grief, esp if you don’t have a long punch (it looks so simple on YouTube.....). Wd 40 and a screw driver you don’t car to much about works though. Good luck.
I had the same issue when I swapped my front disks. The screw heads stripped and I ended up using a combination of a screw extraction set (basically a counterclockwise thread that bites and hopefully turns the screw) and, for a couple of them, having to drill out the head as others have suggested. If you do the drilling I would recommend starting with the smallest bit you have and gradually go up in size to avoid hitting the thread on the hub. If you are having trouble with the screws the long pin that holds the pads in is also likely to give you some grief, esp if you don’t have a long punch (it looks so simple on YouTube.....). Wd 40 and a screw driver you don’t car to much about works though. Good luck.
Edited by Spadey1 on Sunday 31st May 13:45
I’ve already replaced brake pads on all 4 corners. I bought the discs to do them at the same time but came up against these screws
I’ve seen these screw extractor kits; are they a good buy / do they actually work on rusted cars as this is very different to a stripped screw around the house?
I’ve seen these screw extractor kits; are they a good buy / do they actually work on rusted cars as this is very different to a stripped screw around the house?
tozerman said:
Agreed, as other have said. You need an impact driver and a big hammer. That's it..
No need to piss about drilling etc..
How does a manual impact driver with a big hammer compare to an 18V battery impact wrench like the Dewalt DCF887N? Only interested in ability to remove rusted screwsNo need to piss about drilling etc..
magycks said:
How does a manual impact driver with a big hammer compare to an 18V battery impact wrench like the Dewalt DCF887N? Only interested in ability to remove rusted screws
I fear you’re of the opinion your impact gun may be a substitute for an impact driver. It’s doubtful it will. The two of them work in differing ways, despite both using impact. By all means try using your impact gun, if you can keep the bit located in the screwhead, you may be successful, but if you’re not, you’re going to round the heads off and then be back to square one and then having to utilise the methods that have already been suggested.
I don’t want to appear belligerent, but you do seem hellbent on NOT listening to what I and others are suggesting/telling you is the best way forward
If these screws are just to hold the disc in place while you do the wheel nuts up, I'm sure they're not actually needed.
On that basis, no worries if you need to drill the heads off as you can just leave the rest of the screw in the hole and fit the new discs without using the new screws.
On that basis, no worries if you need to drill the heads off as you can just leave the rest of the screw in the hole and fit the new discs without using the new screws.
Slippydiff said:
I fear you’re of the opinion your impact gun may be a substitute for an impact driver. It’s doubtful it will. The two of them work in differing ways, despite both using impact.
By all means try using your impact gun, if you can keep the bit located in the screwhead, you may be successful, but if you’re not, you’re going to round the heads off and then be back to square one and then having to utilise the methods that have already been suggested.
I don’t want to appear belligerent, but you do seem hellbent on NOT listening to what I and others are suggesting/telling you is the best way forward
No no, sorry think there's a bit of confusion. To clarify:By all means try using your impact gun, if you can keep the bit located in the screwhead, you may be successful, but if you’re not, you’re going to round the heads off and then be back to square one and then having to utilise the methods that have already been suggested.
I don’t want to appear belligerent, but you do seem hellbent on NOT listening to what I and others are suggesting/telling you is the best way forward
I currently have a DeWalt Impact Wrench (DCF899N) which is not appropriate for this job and I fully accept that. Apologies if i've miscommunicated on this point.
People have suggested purchasing an impact driver which I shall most definitely do. There are manual impact drivers (like the Silverline one you very kindly recommended Slippydiff) which are used with a hammer but I'm also aware there are battery powered impact drivers like the DeWalt DCF887N (which would use the same battery as my existing impact wrench but performs a different function).
My question is what is the best tool for the job i.e. the hammer (~£10) and manual impact driver (~£10) vs an 18V electric impact driver (~£95 + battery i already have)? I'm happy to spend the money on whichever is best (or even get both)
Hope that makes sense. I've not disregarded anything that's been said but trying to ask questions where my knowledge and experience is lacking. Really appreciate all the help!
RobXjcoupe said:
When the head is removed it removes the tension on the screw. Remove the disc spray the screw studs in releasing oil, let soak for a couple of hours then use a pair of mole grips clamped tightly to the stud and unscrew.
Thanks for the tip on releasing oil; I have ordered some WD40 Fast Release Penetrantmagycks said:
steveo3002 said:
get the hammer one ...prefer a better brand than silverline
if that fails drill the heads off
Thanks. Any brand/product recommendations?if that fails drill the heads off
You can spend A LOT on tools - I use Bahco and occasionally splash out on Wera, but I wouldn’t buy an impact driver from the better producers - £££££!
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