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My 1987 3.6 Sovereign

xjr41
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Re: My 1987 3.6 Sovereign

Postby xjr41 » Thu Jul 18, 2019 1:36 pm

Does removing cats make a noticeable difference?
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1993 XJR Westminster Blue - Second To Last RHD Manual Built - under restoration

pimgmx
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Re: My 1987 3.6 Sovereign

Postby pimgmx » Thu Jul 18, 2019 1:45 pm

xjr41 wrote:Does removing cats make a noticeable difference?

Yes, on almost any car improved flow results in improved performance.
Old school cats are seriously restrictive and negatively impact exhaust flow, thus performance.

A free-flow exhaust on a 5.3 V12 can free up anything up to 30 additional horses, i.e. > 10%...

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stevemc
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Re: My 1987 3.6 Sovereign

Postby stevemc » Thu Jul 18, 2019 1:47 pm

xjr41 wrote:Does removing cats make a noticeable difference?


ohh yes a big differance thing is mine does not need cats fitted as was pre cat so will pass the MOT if your car had them fitted then to pass MOT you need to refit them everytime before the MOT
Jaguar xj40 1986 build D513 NBU vin number ends 504501
Audi A4 Sline 2016

xjr41
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Re: My 1987 3.6 Sovereign

Postby xjr41 » Thu Jul 18, 2019 2:31 pm

Well the Jaguar sport XJR doesn't even have any emissions levels in the system, as far as I know they test under a standard XJ6. Now if you wanted to be really pedantic you could argue the case that those emission levels are wrong and as long as the car can pass some catch all emissions levels then you would be golden to not run any cats.
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1993 XJR Westminster Blue - Second To Last RHD Manual Built - under restoration

david
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Location: Cheshire, UK

Re: My 1987 3.6 Sovereign

Postby david » Fri Jul 19, 2019 12:29 pm

stevemc wrote:
david wrote:What colour is it?


westminster blue one in signature



I should have remembered that - I have asked you about it before. IIRC, your VIN is a few hundred cars before the one my dad had.
Image 1992 Sovereign 3.2 diamond blue (1993 model)

xjr41
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Re: My 1987 3.6 Sovereign

Postby xjr41 » Fri Jul 19, 2019 2:52 pm

xjr41 wrote:Well the Jaguar sport XJR doesn't even have any emissions levels in the system, as far as I know they test under a standard XJ6. Now if you wanted to be really pedantic you could argue the case that those emission levels are wrong and as long as the car can pass some catch all emissions levels then you would be golden to not run any cats.


Anyway this is all nonsense because the new MOT rules demand a visual inspection for a cat on all cars that were built with cats. So no way I've getting past that unless change the downpipe for every MOT.

Which is a bugger really as part of my mods that I had in mind was a pre cat downpipe and a custom stainless exhaust
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1993 XJR Westminster Blue - Second To Last RHD Manual Built - under restoration

Indiana_Jones
Posts: 90
Joined: Wed Sep 14, 2016 9:46 pm
Location: New Zealand

Re: My 1987 3.6 Sovereign

Postby Indiana_Jones » Sun Jul 21, 2019 12:35 pm

david wrote:It is good to see a nice early car on the forum - with the earlier style door mirrors, plenum cowling, early clock and Clarion Jaguar radio - and even the black sticker on the cam cover. They are rare cars now.

These very early cars had a loud 'fasten seatbelt' buzzer warning along with the light on the dash. My father had one of the early cars like this one (his was Feb '87 registered) - and the first thing he had done on the car was to have the seat belt warning disconnected. It was excessively loud and intrusive and removed from slightly later cars so it is likely he wasn't alone in this view. This could have been what has happened with your car.


Cheers for the post mate, yup, the early car has grown on me. Haven't posted lately, have been busy with work etc, but managed to do a bit of pordding about last weekend, trying to find rust. Have found some at the front of the sills and the bits around the rear window. Need to decide the next steps!

Also the seat belt buzzer has only ever come on once, have never heard it since lol
1987 3.6 Auto Sovereign 506111

Indiana_Jones
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Location: New Zealand

Re: My 1987 3.6 Sovereign

Postby Indiana_Jones » Sun Nov 24, 2019 9:16 am

Long time, no post. Usual story of being busy with work and life in general.

Had a go today with bleeding the braking system again with a new one man bleeding kit (had my wife pumping the brakes). I also gave bleeding the master cylinder a go before doing the brakes.

When I bled the rear brakes, a decent amount of air bubbles were in the line (not sure if that was due to my earlier M/C bleeding or not), so was feeling good. Finished up and started the car.......pedal to the floor again.

Now I think the level of fluid in the reservoir was lower after pumping the brakes with the engine on than it was when I started the car, so that got me thinking, is this an issue with the master cylinder or perhaps with ones of the brake lines elsewhere? I can't see any puddles underneath the M/C, would you expect to see one?

Or could this still be connected to the booster system? (the cap is green, so the system should be full of HSMO). Edit: Or perhaps the switch where the booster and brake systems interface (I must admit I haven't had much luck finding that switch!)

Any ideas would be great, at this stage I'm ready to try and find a M/C from a car being wrecked or get a rebuild kit (if they're around) as well as new flexible hoses all round.

Cheers!
1987 3.6 Auto Sovereign 506111

Indiana_Jones
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Joined: Wed Sep 14, 2016 9:46 pm
Location: New Zealand

Re: My 1987 3.6 Sovereign

Postby Indiana_Jones » Wed Nov 27, 2019 9:38 am

Righto, definitely losing fluid somewhere, filled it up, started the engine and got the mrs to pump the brakes; While she was doing that I was looking at the flexible lines, the accumulator switch and master cylinder, but could see no signs of fluid coming out.

At this stage I'm starting to lean towards the M/C causing the grief, as going by what I can find online and here, the symptoms point that way.

Falling short of shelling out nearly $1000 for a new M/C, what's the best approach to this? refurbishment (assuming kits are available) or one from a wrecked car? :?
1987 3.6 Auto Sovereign 506111

morkster
Posts: 21
Joined: Sun May 26, 2019 11:03 pm

Re: My 1987 3.6 Sovereign

Postby morkster » Thu Nov 28, 2019 1:13 am

I did a very quick search and the part number seems to be JLM806.. rebuild kits are available by the looks.