Jaguar Forums - Jaguar Enthusiasts Forum - High tension lead routing

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Alan Lindsay

04-04-2018 12:37 AM

High tension lead routing

Hi all,
Im wading through a major engine clean up on a very sad and neglected XJ12 engine
Good news is that on lifting the cam cover, inside the engine looks immaculate.
The high tension leads seem to be very messy looking more like a plate of spaghetti than engine components
Is there a correct routing diagram of the spark plug leads to be as neat and functional as possible.
Regards
Al

baxtor

04-04-2018 01:08 AM

Quote:

Originally Posted by Alan Lindsay (Post 1870672)

Memory no longer allows me to say where, but i have seen routing diagrams in jaguar manuals so they do exist. "spark plug wire routing" on google resulted in several useful hits.

Greg in France

04-04-2018 02:33 AM

1 Attachment(s)

OEM the wires are mainly very long, because they have to get round the cruise bellows. As I have removed the cruise, I measured up more exactly what would be required, and ordered them up from a UK specialist. Just in case it is useful, attached is the lengths required, and the end-type that goes best.

Some Day, Some Day

04-04-2018 03:59 AM

Here's what I believe should be the proper routing, though there might be some model year variance:

https://cimg4.ibsrv.net/gimg/www.jag...e829366a19.jpg

https://www.jaguarforums.com/forum/d...BSlKAUpSgP/9k=

leo_denmark

04-04-2018 04:31 AM

I have mounted a set of Magnecor leads. It still looks quite messy as the wires is crossing over the distributor cap, and the blue leads does nothing to hide this...
My car has the Lucas Digital P as used appr. 1981-1989, so if you have the same you can see my description of the task here:
LINK to xj-s.dk

https://cimg2.ibsrv.net/gimg/www.jag...33cc6a238f.jpg

Daim	04-04-2018 09:54 AM

Quote:

Originally Posted by Some Day, Some Day (Post 1870717)

CAREFUL! That routing only applies to 88.5-96 XJ-S/XJS. The Series III XJ12 has the Lucas standard setup. The XJ81 XJ12 has the more sophisticated distributorless ignition system.

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