Changed to name from another post since I'm now concentrating on the master cylinder.

My master cylinder is a Girling. Girling says that the bore size is embossed on the cylinder. Despite my best efforts to clean it while its still in the car I can't make out the bore size. Since I can't find a master cylinder from Girling (or anyone else) I'll try rebuilding the one I have.

I can find the rebuild kits, but of course each kit is for a specific bore size. Does anyone happen to know if all V-12 (5.3L) XJ-S's were fitted with a particular bore size, and if so what this size is?

If push comes to shove I'll remove the cylinder and measure the bore, but that makes the car undrivable until the rebuild kit arrives. I'd like to keep down time to a minimum, so if I knew that 1987 XJ-S's all had the same bore size it would be helpful.

Thanks to all,

John
1987 XJ-S V12

 

John,

If you just put the part number of your master cylinder into google, everyone seems to indicate it's a 23.8mm diameter bore.

PAul

 

Problem is, 23.8 mm works out to 15/16th of an inch. Not a diameter Girling shows a kit available for.

My choices are 5/8", 0.70", 3/4" bore and 7/8" bore. The closest of these, 7/8ths, is 1.6 mm less in diameter than 23.8mm.

I wonder if the cupped washers are supposed to make up the difference?

Thanks,

John

 

John

Maybe easier to just buy a new cylinder? Options on ebay and ither direct sites.

Paul

 

Manners sell rebuild kits for the XJS of the correct size. All non-ABS HE cars had the same size of M/C.

 

Hi Greg,

Do you know what bore size?

I'd buy a master cylinder if I could find one. Lot's on e-bay, if you have a Vandan Plas, XJ12 or XJ6, but none that I can find for the XJS.

Thanks!

John

 

Sorry, no idea; I just know kits from Manners will fit. Also, if you are really stuck there are places in England that refurb M/Cs and as part of the process line the bore with stainless tube.

 

John,

Not sure where you've tried, but on the face of it, there doesn't seem to be a problem. Just 30 secs on Google turned up the following from the usual Jaguar US independents::

https://www.jagbits.com/product/CAC1583-X.html

https://www.ebay.com/itm/37417551233...512338&vxp=mtr

https://www.terrysjag.com/product/PMK179.html


Cheers

Paul

 

Thanks Greg.

I just pulled it and am going to send it to a refurbuisher in Virginia, an outfit called White Post Restorations. Talked to them today, they seem competent. They say they can turn it around in 1.5 - 2 weeks for $200 and change. They also sleeve it with stainless steel.

As an aside they said they can't work on Teva (sp?) units due to special tools required and lack of parts.

We shall see.

Thanks to all for the input,

John
1987 XJ-S V12

 

I purchased a brand new Master Cylinder from Paul's Jaguar in Ft Lauderdale and received it yesterday. I have already installed it and bled my brakes. So all is good.
None of the vendors listed above with the exception of the ebay ad (Paul's Jaguar) has this item in stock.
Welshent has a refurbished one but require a $200.00 core charge.

 

Great solution. I think that more and more we will have to take this type of fix to such parts. Only 5 years ago all these parts were plentiful.

 

I looked at all those a few days ago, they all showed out-of-stock.

Anyway, it's on its way to Virginia for a refurb.

Thanks,

John