XJR spark plugs

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04-26-2016, 12:31 PM

paulXJR6

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XJR spark plugs

Hi All, new member here.

I hope this isn't a question that's been asked over and over again. Apologies if so.
What spark plugs do you recommend for a 1996 X300 XJR?

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04-26-2016, 07:23 PM

al_roethlisberger

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This is the updated TSB guidance for all X300 AJ16 engines, normally aspirated and supercharged:

http://tinyurl.com/X300SparkPlugSpecification

AJ16 (4.0L)
EBC 8143 = Champion RC12YCC(if one can find them) or RC12YC
0.9 mm (0.035 in)
22-28 Nm (17-20 lb ft)

Some search results:

https://www.jaguarforums.com/forum/x...-plugs-142974/

https://www.jaguarforums.com/forum/x...6-x300-124062/

Last edited by Don B; 04-27-2016 at 11:30 PM. Reason: To repair link to TSB

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