Hi everyone i was attaching xj6 series callipers to the Adapter plate on the rear axle of my daimler mk2 and found that there was a gap of about 5mm to 10mm difference in fixing the callipers so that they sit centre to brake disk when using xj6 calliper bolts.
i would like to know if it is wright to use shims on the bolts and a longer 7/16 bolt or to take of the adapter plate and add shims to that to make up the difference, what would you guys suggest the best method thanks.

 

I have done this conversion. You will require the use of the original "Dunlop" parking brake mechanisms. I believe with the XJ6 return (fork) springs.

You will need spacers and longer bolts. I used AN (aircraft) bolts as they are strong and have the correct grip length. The grip is the unthreaded portion.
You will also have to fabricate new brake lines.

I purchased standard hardened spacers from McMaster Carr in the U.S.. I cannot recall the size. I am lucky if I remember my name.
I will post some photos.

Bob

 

Hi bob
Thankyou for the quick reply and the photo that looks great
i would love to know the size of the bolt you used and the size of washer if you could get for me thanks

 

sorry for the OT, but what is the advantages of this upgrade? availability of parts?

 

Modern caliper design in comparison to the original dunlop caliper, rebuild kits and availability of parts are easier to source.

 

thanks, thats a great reason to think about upgrading.

 

Hi bob i just wanted to know if you changed the brake servo as well and have you done any other improvements

 

I decided to replace the front calipers also. This was accomplished by purchasing, rebuilding and installing a model 420 front crossmember. It has the later 3 piston calipers and the added benefit of the Marles Variomatic power steering replacing the original Burman "old fashioned" power steering. It was a very common upgrade when there were 420's being parted.

I also replaced the original pedal box with a 420 pedal box and the dual circuit master. I will also add the dual circuit booster which will require a small sheet metal modification. Bob

 

To find the correct AN bolt determine the thread dimension in the mounting plate. They will be inch not metric. Then specify the grip length required by measuring from the face of the mounting plate to the top of the split lock washer. Of course including the spacer which should be around .25 inches thick. The bolt threads should not go beyond the mounting plate face to prevent a possible stress riser. Be certain the bolt is tightened by compressing all the parts and not bottoming out on the mounting plate threads. I believe there is an unthreaded lead in those holes. The spacer should have an ID compatible with the bolt. I do not have the precise AN bolt number as I do not remember and I have most sizes in inventory. Remember to order the bolts with the head drilled for safety wire.

bob

 

It might be advised to replace the front calipers to "balance" the braking. IAs mentioned previously I replaced the entire front crossmember to get the "XJ6" front calipers.

The "XJ6" front calipers have a different mounting bolt spacing and therefore will not bolt on as the rear does.

Look at this company. They have bolt on upgrades.Coopercraft International

 

Hi bob
I went to engineering company today and had spacers cut to size 25mm x 11mm x5mm and i bought some bolts from norman motors and had them shortened and drilled the heads, i have already changed the front calipers to zeus and they fit very wellon the front without changing the upright. I know have to shorten the brake pipes and bleed all brakes i have bought braided brake lines front and back thanks for your help bob

 

Hi can anyone tell me what the best brake flaring tool to get as i dont have one at the moment.

 

Buy Brake Flare Tool Online | Europa Specialist Spares

Excellent tool but may be too large to use on pipes attached to car. Designed to be used on a vise.

Check out Europa Spares they may have smaller individual flare tools. Do you know what flares you need to make?

Bob

 

hi bob
what type do i need 5pt metric or 5pt imperial
the type of bubble flare

 

Good question. I have flaring kit FTC05. Speak with Europa Spares. They were very helpful with me. Its been a while since I purchased it. Bob