Disk back plate solution

Front axle, springs, shock absorbers, wheels, bearings, calipers, drums...
Tuning: suspension, discs, alloys upgrade...
NO parts requests here, please use our V3M BUY & SELL corner
Post Reply
Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Disk back plate solution

Post by Ride_on » 15 Jul 2014 12:00 am

My first set of disk back plates didn't fair too well at the blaster. What are the thoughts on reproducing these?

Laser cut
Press
Panel beater
Modify existing item from a current car model with similar size
Attachments
IMG_3500s.JPG
Disk back plate
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

classicswede
*** V3M DONOR ***
Posts: 5461
Joined: 25 Apr 2005 06:52 pm
Location: Anglesey North Wales
Contact:

Re: Disk back plate solution

Post by classicswede » 15 Jul 2014 07:37 pm

These look like a possible base to modify http://www.vwspares.ie/beetleghia-front ... king-plate
Dai

Please email me directly on dai@classicswede.co.uk

http://www.classicswede.com

phone/text 07824887160

Web shop http://www.classicswede.co.uk/

Image

Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: Disk back plate solution

Post by Ride_on » 24 Jul 2014 01:24 am

I searched around ebay for a bit and came across these. Slightly bigger (disks are about 15mm digger dia).
£12/pair and available in Stainless or Mild steel. I went for mild steel for welding compatibility. They seem quite thick at 1.5mm, not sure what the original is.

Bolt holes need adjustment and just a little cutting down. The metal for M7 bolts that go in the calliper carrier is at the wrong level but that was never going to match up for this approach, and they are usually broken on most cars anyway, still I will try to weld in something, however its not essential.

Anyone recognise?
Attachments
IMG_3511s.JPG
Back lines up nicely
IMG_3511s.JPG (73.54 KiB) Viewed 7465 times
IMG_3510s.JPG
Alternative part with original on top
IMG_3510s.JPG (89.25 KiB) Viewed 7465 times
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

classicswede
*** V3M DONOR ***
Posts: 5461
Joined: 25 Apr 2005 06:52 pm
Location: Anglesey North Wales
Contact:

Re: Disk back plate solution

Post by classicswede » 24 Jul 2014 08:15 pm

I know where they B from,

looks like with a bit of trimming they should work ok.
Dai

Please email me directly on dai@classicswede.co.uk

http://www.classicswede.com

phone/text 07824887160

Web shop http://www.classicswede.co.uk/

Image

Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: Disk back plate solution

Post by Ride_on » 24 Jul 2014 09:14 pm

Mmmm geee what would that B?
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

macplaxton
Posts: 3283
Joined: 09 Feb 2008 02:29 am

Re: Disk back plate solution

Post by macplaxton » 25 Jul 2014 04:37 am

"Potato"
72 DAF 44 Estate 78 Volvo 343DL Black BeautyImageImage
82 Volvo 343DL CVTImageImage 88 Volvo 340DL Diesel

User avatar
bogbasic
Posts: 1861
Joined: 21 Nov 2004 10:12 pm
Location: New Malden, Surrey.
Contact:

Re: Disk back plate solution

Post by bogbasic » 25 Jul 2014 05:55 pm

Man, I can't see what tat's 'as to do with this but I get the hint that this might indeed be a back plate off of a british, low-down, slow, noisy and ugly 'sports car' from the 1960's and in which case a web-search shows they is quite cheap innay....
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

Nimminz
Posts: 1669
Joined: 11 Jun 2010 10:56 pm
Location: Durham City, NE England, UK
Contact:

Re: Disk back plate solution

Post by Nimminz » 26 Jul 2014 07:59 pm

I was going to use pizza baking trays lol
'88 360 +T LSD - sold
'87 760 TDI (D24TIC) - sold
'04 V40 D sport (F9Q, decat, Remapped, launch control)
'89 740 SE (b230ft, 12psi, V-cam, headwork, 'remapped', banded steels)
'86 340 DL 1.4

macplaxton
Posts: 3283
Joined: 09 Feb 2008 02:29 am

Re: Disk back plate solution

Post by macplaxton » 26 Jul 2014 09:29 pm

bogbasic wrote:Man, I can't see what tat's 'as to do with this
http://youtu.be/VYEMNab00bw?t=1m32s
72 DAF 44 Estate 78 Volvo 343DL Black BeautyImageImage
82 Volvo 343DL CVTImageImage 88 Volvo 340DL Diesel

Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: Disk back plate solution

Post by Ride_on » 29 Jul 2014 12:59 am

Interesting, my tablet says it maybe a link to pirated content! HTF does it know?

Anyway, I've done one and it seems to be a good job although I haven't fully assembled as I need some parts like seals and bolts and some blasting, rust dipping and painting.

As usual with such things the accuracy of drilling is important, and I have parked some of the stupid bits I did, so the procedure below is theoretical but not strictly tested 100%.

1. Put the old one on top of the new one covered in tape, even it up and draw on the cutout and bolt positions. One of the bolts overlaps the existing hole and you might even be able to get to line up but then the caliper cutout will not be centered, ideally the hole should be plugged and ground down. The MGB plates are handed, you can make them ambidextrous but then you have more holes to drill or fill. You need the struts to identify which holes you need on each side (mark these on the old plate).
MGB plate marked up.JPG
MGB plate marked up.JPG (40.6 KiB) Viewed 7390 times
2. Drill the 2 middle holes at 7mm, put the bolts in and put a 6mm drill with some tape round it through the caliper carrier holes to mark the hole positions with tap from the hammer, or maybe a little drilling. This should give an accurate position. Some washers will be needed between the plate and the carrier, I think it needs only 1x1.5 (on each bolt). These can be tacked/glued or left loose but they will be fiddley to assemble.

(Stupidly I cut out the the carrier bolt surrounds to make it like the original, this was a huge amount of work when a hole could just be drilled and a washer or 2 used to keep it nice and straight. Note to self.. less OCD)

3. Once the bolts all fit, drill them out to 7.5mm.

5. Make a ring for the centre from 0.9mm steel, 12x160mm (approx) using a small tiptree jam jar as a former (D68mm I think). Weld, grind and get as round as you can, err on the side of larger.

6. Put the ring on the plate (grind away the paint for welding of course), and the big bearing on the stub, then settle the hub on it.

7. Use the hub to align the ring (maybe with some masking tape wrapped around the hub), and tack up. Remove it from the delicate parts and weld slowly, and slower at the more open end as there is less material to absorb the heat. Use an air line to keep it cool. You could get away without seam welding, its just to keep the stones and dirt off the bearing seal, but it also provides strength to the plate.
Centered.JPG
Centered.JPG (72.43 KiB) Viewed 7390 times
(stupidly I aligned it by eye on the MGB hole then welded, compounding the original eye alignment of the old and new plate, it needed some 'adjustment', note to self... think before welding)

8. The vent holes were made with 4 x 13mm drill holes + some cutting and smoothing out with a power file. The centre push-in bit provides strength during welding and I see no reason to remove it, but I did file it down a bit with the powerfile as there is not much clearance to the hub.
IMG_3519s.JPG
old and new
9. Grind, clean and paint. Make sure the areas around the bolt heads are flat.

Parts:
MGB disk back plate = £14 / pair
http://www.ebay.co.uk/itm/MG-NEW-PAIR-M ... 4869109f4d

Bolts : 8x M7x16mm 8.8 grade
http://www.ebay.co.uk/itm/120811012894? ... 1439.l2649

Spring Lock washers: M7
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: Disk back plate solution

Post by Ride_on » 29 Jul 2014 01:20 am

Also just thinking about the missing/broken bolts on the caliper/pad carrier... the backplate will act as a heat sink to some degree, you want those on.
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

Post Reply