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XJ XJ12 ( X305 ) 1995 - 1997

Spark plugs

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Old 09-07-2019, 05:48 AM
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Default Spark plugs
I guess Iridium ones are not recommended. but i seem to find a couple of different options, so not quite sure yet which ones i should get..?
 
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Old 09-07-2019, 12:43 PM
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http://www.jagrepair.com/images/TSB/...6%20Engine.pdf

These are the Champion RC12YC as the final TSB and the gap was changed from .035 to .040 inch on all X300 engines
 
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Old 09-07-2019, 01:15 PM
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Originally Posted by Lady Penelope
http://www.jagrepair.com/images/TSB/...6%20Engine.pdf

These are the Champion RC12YC as the final TSB and the gap was changed from .035 to .040 inch on all X300 engines

Thanks! But I can't quite figure out I need the br6ef or the br7ef?
 
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Old 09-07-2019, 03:21 PM
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br6ef it is😅
 
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Old 09-07-2019, 04:00 PM
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I can't find the TSB but I think they went from a RC9YC to a RC12YC

The 12 being a hotter plug
 
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Old 09-09-2019, 06:07 PM
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NGK BR7EF sirs! That was also an update for the V12. The RC12YC is only for the AJ16. But we all know that...

The BR6EF will be fine for the V12 too, if already on hand.
 
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