[xj40] spark plug gap for 1989 vdp 3.6l

I have been told by several parts stores that the proper spark plug
gap posotion is .oo35 is this correct of course jaquar here in
cincinnati won’t tell me. PEASE HELP–
Joel Davis
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In reply to a message from Jd7 sent Thu 21 Jul 2005:

Joel,

Yes, 35 thou (or 0.9mm) is the correct gap and the recommended plug
is Champion RC9YCC (or RC9YC if the double copper versions are not
available).

If you fit a different brand of plug, the gap may differ - see that
plug manufacturer’s guide.–
The original message included these comments:

I have been told by several parts stores that the proper spark plug
gap posotion is .oo35 is this correct of course jaquar here in
cincinnati won’t tell me. PEASE HELP


Bryan N, '91 Sovereign 4.0 L, (RHD)
Cambridge, United Kingdom
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In reply to a message from Bryan N sent Thu 21 Jul 2005:

as myself any many other lister have done, also consider widening
the gap by 2-3 1,000ths…this seems to help smooth out the idle a
bit…–
The original message included these comments:

Yes, 35 thou (or 0.9mm) is the correct gap and the recommended plug
is Champion RC9YCC (or RC9YC if the double copper versions are not
available).


Cliff - '93 XJ40 Sovereign (4.0L)
Lancaster/South Carolina, United States
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