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by Starbuck
Tue May 29, 2018 1:00 am
Forum: Engine
Topic: Engine vibrating after warm-start
Replies: 49
Views: 3498

Re: Engine vibrating after warm-start

Hi Oliver, The dropping resistor pack on your car will be on the right side of the firewall, attached to an alloy plate that acts as a heat sink on which are also mounted the two ignition amplifiers. It is located behind and below the relay bank. The wiring on the 6.0 is different to an XJS and the ...
by Starbuck
Mon May 28, 2018 12:24 am
Forum: Engine
Topic: Engine vibrating after warm-start
Replies: 49
Views: 3498

Re: Engine vibrating after warm-start

Hi Oliver, The valley of the Jaguar V12 gets extremely hot. On the 6.0 not only does it have all of the usual stuff cluttering up the valley like the AC compressor, coils, cruise control, throttle pedestal etc, it also has a cover over all of that to reduce airflow even further. With the engine runn...
by Starbuck
Sun May 27, 2018 1:11 pm
Forum: Jaguar XJ40 Gallery
Topic: G'day from Melbourne - 1990 4.0 Sovereign in gunmetal/doeskin
Replies: 12
Views: 1165

Re: G'day from Melbourne - 1990 4.0 Sovereign in gunmetal/doeskin

Hi Lachy, That's certainly a very nicely built XJC, though yes, not one for the purists! I've never much liked the old boat anchors in Jaguars, but for most people the cost of getting big horsepower out of a clean-looking V12 is prohibitively expensive. We sold our XJC a couple of years ago but it w...
by Starbuck
Sun May 27, 2018 4:14 am
Forum: Service
Topic: Rear Diff care
Replies: 105
Views: 14084

Re: Rear Diff care

Hi Oliver, Just a quick note on your comment about transmission fluid. GM recommend using Dexron-VI in all GM4L80e transmissions (the XJ81 transmission) as it is backwards compatible with Dex-III and is a much more stable fluid that drastically increases the life of clutch plates. You can't use Dex-...
by Starbuck
Thu May 24, 2018 12:58 am
Forum: Engine
Topic: Engine vibrating after warm-start
Replies: 49
Views: 3498

Re: Engine vibrating after warm-start

Hi Oliver, You can certainly do that, just bear in mind that to get the heat shrink over the broken insulation will require removal of the plugs on the ends of the loom. You will need to be exceptionally careful with the already fragile loom, and you will need a set of terminal tools to remove the c...
by Starbuck
Wed May 23, 2018 1:42 pm
Forum: Engine
Topic: Engine vibrating after warm-start
Replies: 49
Views: 3498

Re: Engine vibrating after warm-start

Plus the obligatory collection of old alarm bits...
Image

Loom out of the valley (sorry dirty engine bay).
Image

Best,

Starbuck
by Starbuck
Wed May 23, 2018 1:34 pm
Forum: Engine
Topic: Engine vibrating after warm-start
Replies: 49
Views: 3498

Re: Engine vibrating after warm-start

Yep, we had an almost identical pile of loom 'bits'!

:)
by Starbuck
Wed May 23, 2018 1:25 pm
Forum: Engine
Topic: Engine vibrating after warm-start
Replies: 49
Views: 3498

Re: Engine vibrating after warm-start

Hi Oliver and BB, I agree with BB about the Marelli fire issue being caused by poor maintenance rather than poor design. Both our Marelli ignition system V12s had what might be called 'overenthusiastic' maintenance, and on our XJ12 the cap and rotor were original and after 130,000kms only just start...
by Starbuck
Wed Apr 11, 2018 12:28 pm
Forum: Jaguar XJ40 Gallery
Topic: Daimler Double Six - 1993 - J6DXJ
Replies: 107
Views: 8234

Re: Daimler Double Six - 1993 - J6DXJ

Sorry all, I have been unavoidably offline. XJ81/40 condensers are not interchangeable. The V12 AC system has one hose either side of the radiator to allow room for the twin air boxes to be serviced. As far as I am aware the XJ81 condenser is NLA so if the condenser is leaking you will need to repai...
by Starbuck
Sat Mar 17, 2018 10:57 pm
Forum: Suspension
Topic: 4.0 diff in a 3.2?
Replies: 16
Views: 944

Re: 4.0 diff in a 3.2?

Hi Quad, Not a problem, but that's ma'am to you ;) One of my specialisations in a former career was high-pressure gyro-stabilised hydraulic systems - not in an aviation application in case you were wondering. I've done a couple of Rangie diffs and an XJS - incidentally fitting XJ81 3.58 gears to an ...

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