How do I change my spark plugs on my 07 XJR?
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If it is similar to my 2005 XJR it is not difficult to do. The worst plug is on the drivers side rear most position.
However there is a flap in the side of the "box" surrounding the brake fluid reservoir that comes out allowing much better access with the correct socket and adapter.
Also go with the factory recommended plugs. I did not 1st time and got noticeably worse mpg.
You do not have to replace the COPs unless of course any are bad.
Also IF you ever have to remove the super charger it is NOT necessary to remove wipers and the plastic cowling. Just lever up the passenger side.
Trust me I have done that several times.
However there is a flap in the side of the "box" surrounding the brake fluid reservoir that comes out allowing much better access with the correct socket and adapter.
Also go with the factory recommended plugs. I did not 1st time and got noticeably worse mpg.
You do not have to replace the COPs unless of course any are bad.
Also IF you ever have to remove the super charger it is NOT necessary to remove wipers and the plastic cowling. Just lever up the passenger side.
Trust me I have done that several times.
Last edited by jackra_1; 12-30-2016 at 08:32 PM.
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jimlew (01-02-2017)