Caliper ID/compatibility help?

missfire · 12-06-14, 12:19 PM

Heloo. Does anyone know what these calipers are called?

http://www.ebay.com/itm/Disc-Brake-C...00d55c&vxp=mtr

I've seen TWR and Lucas/Girling used to describe then, don't know what name is right! They are the only thing holding me back from, MOTing a biturnip2.7 allroad, to be used or sold, but no use to anyone with no MOT.

They seem to be only available from mainly the US, Californa mostly. Could import some, but was wondering if anyone knows if I could fit something like these -

http://www.ebay.co.uk/itm/BRAKE-CALI...item20df8ae7ae

The first ones have one big slider thing the second ones have two. I've seen them both described as HP2! Think the second ones are Hp2?

I bought a seals kit for mine (first listing), was advertised as correct, but it's not, it's a rebuild kit for the second ones there. Piston seals are the same size, and I've rebuilt one caliper, but the dust boots wouldn't have enough travel. If I fit them and wear the pads down to nothing they'll probably pot out!

Need some expertise on A6/S6 caliper carriers/bolt spacing etc? Long shot, maybe better asking on another forum, but I'm not!

because I don't know any other passwords.

Martc · 12-06-14, 01:34 PM

There are more than on type of HP2 - have a look at this for a start

http://www.s2forum.com/forum/showthread.php?t=68900

and you don't need a password

mikes2 · 12-06-14, 02:40 PM

The second link is the early version of HP2 calipers fitted to A8, A6 S4 and uses a 314x30 mm disc

The first one is an updated version and takes either a 321mm or 323mm disc depending on application. These were fitted the S4, A8 and A6 / allroad up until 2002/3

They're not interchangeable unless you also swap the disc. I'd expect your allroad to use the first one

Hanuman · 12-06-14, 03:27 PM

I bought a set of the hp2 calipers from Graham's. Very quick service, but there are in fact 2 part numbers in their stock, for both left and right. The ones that I have are definitely for 314mm disks, but the mounting boss appears to be large enough so that one casting could be used for a larger diameter disk, subject to the finishing machining.

missfire · 12-06-14, 10:50 PM

Oh brilliant stuff, not the wrong forum, I knew that...

thanks. Will read that S2 forum thing!

Better not swap for smaller discs then, might not stop the bugger, it weighs a bit!

It is the updated ones on the Allroad.

Where is Graham's Mr H?

I've seen some on ebay USA, from Texas, from a breaker, look like new! All that dryness I suppose. Mine have sat in the frosty salty north east of Scotland for about ten years before I got it. When you go to do anything on the car you just pray you're not going to meet anything made of alloy, which one half of these calipers are. Should have seen me getting the bleed nipple out of the one I rebuilt!! Multiple cobalt drill bits and a dentists pick to finish.

The other caliper.. that I have not braved yet, has no bleed nipple! Some numpty has ended up on a very large drill bit and tap and theres a bloody 12mm shank bolt in the phkr! Not much chance of bleeding it without pissing fluid all over the disks pads.

So I think I need new ones.

Hanuman · 13-06-14, 05:52 AM

Quote:

Originally Posted by missfire

Where is Graham's Mr H?

Grahams125. The second ebay link in you original post.

missfire · 13-06-14, 11:09 AM

I see! Yep, just contacted them, and they can't get the new calipers and don't have them, hmmm. Only fitted to limited vehicles maybe? Seem very hard to find. There are some old scabby ones on ebay but will probably shortly give similar problems, so want immaculate ones or refurbed. You can get them 'new' from a brake parts site in the UK, problem is they are about £300 each! Not wise on a car that wouldn't sell for more than £1500!

mikes2 · 14-06-14, 02:12 PM

Just been through this with a friend's S4 which uses the same caliper. Couldn't get a new one from the usual places. Although they show them as in stock, they're not.

Audi are £487 + vat for each caliper. Managed to use a 2nd hand one, ironically from an Allroad

missfire · 15-06-14, 01:41 AM

Holy christ.

right, seals kit it is then, I WILL make it work! The one I did already works great, just one piston seems to jam on each side. Just need to get around the bloody 19mm single hex bleed nipple! Pressure bleeder at the ready.

missfire · 17-06-14, 10:08 PM

Found some.

new/remanufactured. £100 each.

20mpg summer it might be after all. Then sell it in winter.

12-06-14, 01:34 PM	#2
Martc Black Coupe Collector Classic Audi Club Member Join Date: Feb 2008 Location: Towcestershiresheer Posts: 2,932	There are more than on type of HP2 - have a look at this for a start http://www.s2forum.com/forum/showthread.php?t=68900 and you don't need a password __________________ 95 UrS6 87 Coupe Quattro

12-06-14, 02:40 PM	#3
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	The second link is the early version of HP2 calipers fitted to A8, A6 S4 and uses a 314x30 mm disc The first one is an updated version and takes either a 321mm or 323mm disc depending on application. These were fitted the S4, A8 and A6 / allroad up until 2002/3 They're not interchangeable unless you also swap the disc. I'd expect your allroad to use the first one __________________ 1991 90 quattro 20v sport 1991 90 quattro

12-06-14, 03:27 PM	#4
Hanuman Trickster Classic Audi Club Member Join Date: May 2009 Location: Heckling from the cheap seats, Phnom Penh, KoW Posts: 7,006	I bought a set of the hp2 calipers from Graham's. Very quick service, but there are in fact 2 part numbers in their stock, for both left and right. The ones that I have are definitely for 314mm disks, but the mounting boss appears to be large enough so that one casting could be used for a larger diameter disk, subject to the finishing machining. __________________ I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor

14-06-14, 02:12 PM	#8
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	Just been through this with a friend's S4 which uses the same caliper. Couldn't get a new one from the usual places. Although they show them as in stock, they're not. Audi are £487 + vat for each caliper. Managed to use a 2nd hand one, ironically from an Allroad __________________ 1991 90 quattro 20v sport 1991 90 quattro

12-06-14, 10:50 PM	#5
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,154	Oh brilliant stuff, not the wrong forum, I knew that... thanks. Will read that S2 forum thing! Better not swap for smaller discs then, might not stop the bugger, it weighs a bit! It is the updated ones on the Allroad. Where is Graham's Mr H? I've seen some on ebay USA, from Texas, from a breaker, look like new! All that dryness I suppose. Mine have sat in the frosty salty north east of Scotland for about ten years before I got it. When you go to do anything on the car you just pray you're not going to meet anything made of alloy, which one half of these calipers are. Should have seen me getting the bleed nipple out of the one I rebuilt!! Multiple cobalt drill bits and a dentists pick to finish. The other caliper.. that I have not braved yet, has no bleed nipple! Some numpty has ended up on a very large drill bit and tap and theres a bloody 12mm shank bolt in the phkr! Not much chance of bleeding it without pissing fluid all over the disks pads. So I think I need new ones.

13-06-14, 11:09 AM	#7
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,154	I see! Yep, just contacted them, and they can't get the new calipers and don't have them, hmmm. Only fitted to limited vehicles maybe? Seem very hard to find. There are some old scabby ones on ebay but will probably shortly give similar problems, so want immaculate ones or refurbed. You can get them 'new' from a brake parts site in the UK, problem is they are about £300 each! Not wise on a car that wouldn't sell for more than £1500!

15-06-14, 01:41 AM	#9
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,154	Holy christ. right, seals kit it is then, I WILL make it work! The one I did already works great, just one piston seems to jam on each side. Just need to get around the bloody 19mm single hex bleed nipple! Pressure bleeder at the ready.

17-06-14, 10:08 PM	#10
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,154	Found some. new/remanufactured. £100 each. 20mpg summer it might be after all. Then sell it in winter.