Hello,

I cannot find the gasket between the two halfs of the calipers Front and rear.

Jaguar does Not offer These.

Can anybody help?

BR stefan

 

You might want to give us a clue to the year of the car

It matters.

Help us to help you.

 

Oh sorry 1995

 

I’m not sure there is a difference to the calipers, but the ABS system changed at some point during the 1995 model year. Is your brake fluid container under the hood triangular? If so, you are in the 1995.25 model year, which could make a difference. If not, you have a 1995.00

When I did some work on a failed caliper on my 1996 (which would be the same as the 1995.25), I read somewhere that the calipers were not serviceable and should never be split. I suspect it’s because of this very reason.

You may just want to buy some renewed calipers from RockAuto. A word of warning, I ended up replacing my front calipers and one of the refurbished ones I got was leaking right off the bat. It was an easy process to replace, but know that it could happen.

 

stefan,

On the front calipers, there isn't a gasket between the two halves. There are just a number of O-ring seals on the fluid passages.

On the rear calipers, it's a single piston sliding caliper arrangement, so doesn't really have "two halves".

Hope that helps,

Paul

 

​​​​​ ...thanks all for your help.

Yes i know i need only the o rings.

 

Stefan,

There are others here who have split the front calipers, and can no doubt advise how they sourced suitable o-ring seals.

Good luck

Paul

 

I found those a few years ago, part 67320782x.

 

They don't need a gasket as there are no oilways in them.
And I belive the rears are floating so no halves.

 

Okay i haven't Split them yet. If that is the case would be great.

Thanks Stefan

 

The front calipers have Pistons on both sides, so there have to be oil channels i think....

 

I just to a look the web tells me only cars till 1994 mine is 1995.

???

 

Just had a look at various websites and it appears the only thing that goes between them is a small '0' ring. Although it's not recommended to split them I'll put a link on here

 

Thanks a lot i will see if find them anywhere..

 

Small o rings between the halves but these are not normal o rings as they have a square profile. I rebuilt both my front calipers a couple of weeks ago. I purchased a kit of pistons and seals which worked a treat.


Rob

 

Worst case if no part number was available you can always do "the O-ring math" - i.e. measure the dims of the volume space it is going into, and calculate the correct "squeeze" ratio - then that would tell you what O ring dimensions (not material) to use. But you'd just need a material that works w/ brake fluid.

https://www.marcorubber.com/o-ring-g...iderations.htm <---And similar)


~PK

 

The front calipers are the same on XJSs.

Paul

 

I got mine from Big Redd ( Here ) as part of a rebuild kit so it may be worth asking them though I doubt they will sell separately - I did a quick search but can't find what I bought - replaced pretty much everything, including stainless pistons, all came as part of a kit but I am not sure if they still offer this particular kit.

Stainless pistons if you get them really need to be spun on a lathe and polished though the ones I got were pretty good,

edit : Found seals - Casting seals

 

If the calipers are the same on all XJS, this might help. I recently rebuilt a friend's calipers for a 1991 V12. I got the seal kit and O-rings, from Moss Motors, and 8 new TRW pistons from British Parts North West. Everything went perfectly.

Qty 1 RTC1116 Caliper Kit, Axle Set
Qty 4 583-820 Seal, Caliper joint Girling
Qty 8 Caliper Piston 48mm Spitfire 68 to 80, XJ 74 to 87

I went with chrome plated TRW steel pistons to make sure the surface finish was up to spec. Read a bit about SS pistons being variable, and some might be a bit rough - chose path of least discoveries.





HTH, Dave