Who owns a ph 4 screwdriver?

[John W]

Any one else snookered by those retaining screws trying to change the front brake rotors? Looks like they are a size 4 phillips head now stuffed with my size 3 impact driver. Even my local specialist tool shop could not supply one. I will drill them out tomorrow and try and get some new ones from MR automotive. But why would LR choose those rather than a hex key or even a straight slot head. I suspect that very few of us DIYers have a size 4 phillips screwdriver in our tool boxes. Rant finished, I feel better and hope to get the job done next weekend!

[imatt]

Hi Mate,
I had no trouble when changing my rotors, I used my neighbours impact driver (I hadn't bought one yet) and it was straight forward, were yours already damaged? They could possibly have been overtightened previously, or maybe they are an item to replace with the rotors.
Cheers Matt

[bee utey]

Use a flat pin punch of around 10mm diameter, punch in the heads with a lump hammer until they come loose, you might even be able to use the screwdriver on them then.

[Sully]

They will probably require a good soak with some wd40 or similar. Mine were well and truly stripped by some previous clown before I even started. They required drilling out.
Replacement screws are cheap and a quick spray with rust prohibitor followed by greasing them up before you screw them in isn't a bad thing.

[feral]

Here's a thread on my rotor change. I had the same problem.

http://www.aulro.com/afvb/technical-chatter/29805-discovery-ii-brakes.html

If you wish to 'cut to the chase'...

The job in the end was very easy to do. With the bolts that hold the full caliper on it is a 19mm. I used a 12 point socket with a breaker bar and it released easily. The problem area was the screw which holds the rotor to the hub. I took Defenderzook's advice and bought an impact driver. The only problem with it is the screwheads are not big enough. Phillips 2 & 3 are small but I had a very large phillips head in a cheap socket set which fitted a lot better. The main trick from Ron's link was to heat up the screw. This worked perfectly. With a little heat then the impact driver had them undone in a flash.

Summary....use heat first.

[Blknight.aus]

they aint phillips, thems posidrive.

p4 wont fit...

[Ratel10mm]

Pozi no. 4 are available, I asked one of the local tool shops today after reading your post.

[Ean Austral]

Just replace them will hex style when you replace the rotors, never have the problem again.


Cheers Ean

[Bundalene]

As said earlier, a pin punch on the outer edge of the countersunk screw will undo them very quickly.


Erich

[Urban Panzer]

The screw is only there to stop the disc falling off when removing the wheel, once the wheels on, its not doing anything anyway.

I have had to drill out 2 of the 4, when I fit new ones they go in covered in copper slip and I also "fill" over the head as well which stops the head filling up with crap.

[John W]

Just replace them will hex style when you replace the rotors, never have the problem again.


Cheers Ean

Thanks, that is just what I would like to do for either myself or the next poor bugger that wants to change the rotors. I phoned MR automotive who are putting some standard ones in the post for me. Do you remember the thread pitch and diameter and length to see if the local bolt barn can help me with hex head replacements. Otherwise I will just do as UP suggests and cover them in copper slippery stuff.

[John W]

they aint phillips, thems posidrive.

p4 wont fit...

Thanks, you may have saved me more anguish. I did not see the little nicks for a posidrive but they are full of crud and now stuffed anyway but I will see if I can get my hands on a size 4 posi to put the new ones in.

[Ean Austral]

Thanks, that is just what I would like to do for either myself or the next poor bugger that wants to change the rotors. I phoned MR automotive who are putting some standard ones in the post for me. Do you remember the thread pitch and diameter and length to see if the local bolt barn can help me with hex head replacements. Otherwise I will just do as UP suggests and cover them in copper slippery stuff.

I cant remember, but I managed to get 1 of the 4 out when I did mine on the D2 ( when I had it ) and it was a standard pitch and thread and about 20mm. I took the 1 with me and came home with 4 hex style and job done.

Cheers Ean

[Pedro_The_Swift]

and as UP says,
just put the disk back on without the silly screws,,
there are 5 perfectly fine oversized wheel nuts to ensure it wont fall off anytime soon--;):D