[xj] Spark plugs for the V12 HE

XJ
1

Hello everyone,
I’m just after the forums opinion about spark plugs. I’m going to
be doing my first service on the V12 shortly and would like to know
the general opinion of what plug is the most suitable. Champion or
NGK?
( or any other make )
Many Thanks.–
Steve Fitches, XJ12 SIII
Maidenhead, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

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2

Steve:
The correct plug for your V12 car is NGK BR7EFS unless it is a 1992
model inwhich case it is BR7EF. (Full information helps!).
Gregory----- Original Message -----
From: “Steve Fitches” steven@fitches2372.freeserve.co.uk
To: xj@jag-lovers.org
Sent: Wednesday, May 12, 2004 11:15 AM
Subject: [xj] Spark plugs for the V12 HE

: Hello everyone,
: I’m just after the forums opinion about spark plugs. I’m going to
: be doing my first service on the V12 shortly and would like to know
: the general opinion of what plug is the most suitable. Champion or
: NGK?
: ( or any other make )
: Many Thanks.
: –
:

===================================================
The archives and FAQ will answer many queries on the XJ series…
FAQs: http://www.jag-lovers.org/xjlovers/xjfaq/index.html
Archives: http://www.jag-lovers.org/lists/search.html

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3

At 20:15 2004-05-12 +0200, Steve Fitches wrote:

I’m just after the forums opinion about spark plugs. I’m going to
be doing my first service on the V12 shortly and would like to know
the general opinion of what plug is the most suitable. Champion or
NGK?

I run Champions in my XJ-S Cabrio right now, but NGKs are good too.

FTR, as this is engine related, it’d be better served on the V12-engine
list. MOST XJ owners are running an inline 6 engine. EVERYONE on the
V12-engine list is presumed to have, or be interested in, the V12.

You may want to download Kirby Palm’s XJ-S book (yes, XJ-S). There’s quite
a bit of information which pertains to the V12 engine in there.

Also, at my website under the “something useful” link near the bottom, I’ve
got a simple template for a spark plug caddy (print it, spray the backside
with contact cement, and lay it out on a piece of wood or MDF, then drill
holes in it for the spark plug tips). It is useful for keeping the plugs
ordered to which cylinder you removed them from, and for the new plugs
going in, keeps the threaded end upwards (rather than having tabs getting
dinked around and altering the gapping just slightly, or getting the
threads with antisieze applied to them all gunky with debris from your
workarea). Firing order and cylinder number identification is also printed
on the template, along with a reminder about the direction of rotor
rotation in the distributor.

I really aught to revisit it and add torque and gapping data, as well as a
strong reminder to use antisieze on the plug threads.

— '88 Jaguar XJ-SC 5.3L V12 (LHD) ‘Black Cat’
Sean Straw '85 Jaguar XJ-S 5.3L V12 (LHD) ‘Bad Kitty’
Marin County, California '91 Jaguar XJ40 4.0L (LHD) ‘Trevor’
http://jaguar.professional.org/ '69 Buick GranSport 455 V8===================================================
The archives and FAQ will answer many queries on the XJ series…
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Archives: Jag-lovers Forums - Jag-lovers

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4

Hello everyone,
I’m just after the forums opinion about spark plugs. I’m going to
be doing my first service on the V12 shortly and would like to know
the general opinion of what plug is the most suitable. Champion or
NGK?

Hi Steve. Some of the V-12 were originally supplied with Champions and I
think that is still reflected in the service manuals as the plug of
choice. However Jaguar issued a service bulletin to the dealerships
informing them of a change to NGK BR7EFS with a .025 gap. They recommended
that all be fitted with that plug in future.

Bob.===================================================
The archives and FAQ will answer many queries on the XJ series…
FAQs: http://www.jag-lovers.org/xjlovers/xjfaq/index.html
Archives: Jag-lovers Forums - Jag-lovers

To remove yourself from this list, go to Jag-lovers Forums - Jag-lovers.

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