Yep, and plug the hose with a PK screw for now. Further removal will come when the beast settles down.

 

You're already there! There is absolutely nothing wrong with the temps you have reported. *Nothing*. Running 80s-90s is perfectly OK.

But, I do agree that the temp-increases-as-the-throttle-is-opened merits looking into. My first thought is to bleed the system again.

Cheers
DD

 

Thanks Greg, that's one comprehensive radiator bleed procedure that only a Jag V12 guy would comprehend. Luv it
😀👌

 

Right just took the ol girl for a run, about 40klm's round trip. Temps are more in control. At the half way point I pulled over and ran some checks. About 89c both sides and the gauge was sitting just below the Trip home stayed the same. A little hotter when I pulled up at home and idled for 5 minutes or so. temps about 94c both sides hottest spot I found around the heads was 100c. warm day here 32c and 90% humidity. Best outcome yet but running 74c stats to achieve it. More work to do....

 

ok, new update. After a couple of hours of tutorials from the God father of Jaguar.....Mr Francis. We both agreed that all seemed fine except maybe a tad more timing. So as an obedient student I began by removing the dizzy cap to loosen the three internal screws so I could move the dizzy body clockwise to gain more advance. Whilst there, I traced the advance vac hose which disappeared under the right inlet manifold to god knows where. Well the vac hose was connected to a vac solenoid that was connected to nothing.... These motors do not appreciate zero vac advance. So connected the vac hose to some positive vac, left the dizzy where it was and went for a test drive. Pretty warm here atm, the gauge settled at just over 1/3 of the scale and with some enthusiastic acceleration I found the ponies that had been missing and the gauge got up to a needle width under the N or about 90c at it's hottest. back down to mid 80's if just cruising. No pinging under load so I will try a little more advance. Thanks to all who contributed, I really appreciate the help. Regards Russell.

 

Great stuff. As far as the vac capsule is concerned, as the Wizard of Oz (Bows deeply to the Southern Cross) may have already suggested, I have, and strongly suggest you, run a line direct from the capsule to the conveniently situated and sized spigot under the RHS (A bank) throttle body, and permanently cut out all the bits and pieces in between.
Also, disconnect the 15 minute timer loom from the thermostatic switch on the A bank rear water manifold and tie off the loom somewhere (you will find the switch under the inlet manifold, next to where the heater water feed pipe is). This will stop the system quite unnecessarily running rich for 15 minutes on startup.
Greg

 

Have done as you suggested. Thanks. So happy to have the XJS performing something like it should. It actually accelerated today to a point where I was unhappy with the suspension keeping up... first time I have hit 6000 rpm she sounded beaut.....yes I did have the drivers window down.

 

Good for you. When the car is performing properly, in UK spec at least with no cats and the 12.5:1 CR, it is decently fast (for me anyway), well below 7 secs 0 to 60 and pulls like a train in the higher rev band and above 90MPH. Great feeling. Mind you, as you are now finding out, this shows up any shock absorber/ball joint/suspension bush/braking weaknesses. Nothing that cannot be fixed, and when the car is bang-on, it is a terrific package IMO.
Greg

 

Yep, totally agree. My rx7 is brutally fast, but lethal. The XJS is far more predictable.

 

Glad to hear everything worked out OK !


Cheers
DD

 

Another simple fix to a very SIMPLE motor car.

Back to the Necta.

 

I hear that....thanks again. I will drive tune the timing, I think there is a little more room for advance.

Happy Aussie Day to us!!!!!!! eat some lamb drink some, anything and play back yard cricket.... whooo hooo

 

.

hey, i had a 1987 Turbo RX7, modded with water /air intercooler,big turbo, dynod 420hp at the wheels, yup! very fast, MUCH faster than my XJS V12!

pix