In reply to a message from Rob Reilly sent Sun 24 Aug 2014:
I '‘think’ you are saying, from your check of where the dist
shaft slot/dog fits that the internal lower dog is installed
incorrectly,…so as Rob says you can re assign the plug
wires to cap,. If…it is only the distrib that was
installed wrong…180 out it would seem the alignment would
be further out…but that is if the case…then just the dizzy
R and R, reversing it would do the job.
Firing order firing order 6-2-4-1-5-3, #1 cyl at firewall,
#6 toward radiator-front. Engine and crank damper rotate
counter clockwise from positon of driver in seat facing
forward, which is the ONLY orientation for rotation and
right and left. Distributor rotor rotates counter clockwise
as viewed in place from above, Turning distributor body
clockwise advances timing. SB 124 corrects degrees per
flywheel tooth to 2 �. (actual is 2.73) 132 teeth on
flywheel, 360 degrees. Distributor 40199E most common to
late xk120 and 140. Many distributors exist, and will work,
,most differ in the springs for mech and vac advance units.
Timing ranges mostly from 5 deg early xk, to 7 deg late,and
10 deg xk140. Pt gap .014-.016, with 016 most commonly
used, plugs NGK BP5ES mid-hot for older, BP6ES colder. Plug
gap .022-.025. .022 for longer higher rev use. .025 most
commonly set. When flywheel is set with proper timing mark,
the distributor rotor should point approx. to #6 sparkplug
wire connection as on cap. Distrib is correctly installed
when the vac unit is on left.
#6 is front-radiator end.
Early XK120 timed at 5deg BTDC, later XK120 at 7deg, XK140
times at 10 deg BTDC, one tooth is 2.73 deg. Rotation of the
flyweel is counterclock (as from driver facing front).
Rotation of rotor is counter clock…viewed in place from
By the way, the Jaguar Service Manual states that with
regard to right and left, the viewpoint is from the driver
position facing forward. This should always be the
reference for right or left, and clockwise or counter clock
wise. You have only one right arm, the car has only one
right side. If everyone would do this a lot of confusion
and error would be eliminated.
If the distributor has been removed and you are to re-
install, To be sure the distributor dog in the drive gear is
correctly positioned and fitted and not 180 out, which is
quite easy to get wrong. The distributor base half can be
out of whack with the upper half. Always note this and mark
well on removal-dis-assembly.
The distributor Vacuum advance unit will be toward left, and
rearward. Cap clips will be Inner clip toward engine-
slightly forward, say 1 o�clock, and outer clip toward right
fender, a bit rearward, say 7 o�clock as you are at right
fender side facing the engine.
The original message included these comments:
the wires around, as long as you get the firing order right
Spokane WA, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
//please trim quoted text to context only