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Lucas Distributor Applications
Lucas Distributor Applications
From: Rob Reilly[SMTP:reilly@admail.fnal.gov]
Sent: Wednesday, February 26, 1997 5:33 PM
To: XK lovers
Subject: Lucas Distributor Applications

Here is a list of all standard models '46 - '60 and the Lucas distributor service numbers which are stamped on the outside of the body. There are at least three outer bodies that I am aware of, and three Bakelite caps, leaving out the 4 cylinder. In many cases the differences are internal, such as different weights and springs. I believe nearly all distributor assemblies are interchangeable in all engines, except of course the 4-cyl., but would not necessarily give the optimal performance; and naturally one would not put a DXA6A with manual advance from a Mark IV into a later car. The source is "Jaguar Cars" by C.L. VanDiest c.1962, a general repair manual covering the cars listed below. For some reason the distributors for pushrod cars are only given as D*** numbers and the DOHC are only given as 40*** numbers, though I happen to know the MkV and early XK120 distributors are virtually identical except for the springs.

Model Compression Ratio Distributor Contact Breaker gap Static Timing
1946-48 1.5 L 6.8:1 DKY4A .010-.012 5 deg
1946-48 2.5 L 7.3:1 DXA6A .010-.012 10 deg
1946-48 3.5 L 6.75:1 DXA6A .010-.012 10 deg
Mk V 2.5L 7.3:1 DVXH6A .010-.012 5 deg
(from the factory parts book this one is 40156E - GC40)
Mk V 3.5L 7.2 or 6.75:1 DVXH6A .010-.012 5 deg
(from the factory parts book this one is 40149E - GC42)
XK120 7:1 CR 40198A .010-.012 5 deg
40198D .014-.016 5 deg
40249B .014-.016 5 deg
8:1 CR 40199A .010-.012 5 deg
40199D .014-.016 7 deg
40199E .014-.016 7 deg
Mark VII 7:1 CR 40263A .010-.012 5 deg
40263B .014-.016 5 deg
8:1 before B2197 - 40276A .010-.012 5 deg
8:1 before B2197 - 40276B .014-.016 5 deg
8:1 after B2917* - 40372A .014-.016 3 deg
* note a probable misprint in VanDiest, perhaps a Mark VII owner can check for the correct engine no. of the change.
Mark VII M 7:1 40435A .014-.016 5 deg
8:1 40372A .014-.016 tdc
XK140 7:1 40435A .014-.016 8 deg
8:1 40436A .014-.016 10 deg
w/C head 8:1 40199E .014-.016 10 deg
2.4 Ltr Mk1 7:1 40557A .014-.016 4 deg
8:1 40528A .014-.016 6 deg
Mark VIII 7:1 40578A .014-.016 4 deg
8:1 40576A .014-.016 6 deg
3.4 Ltr Mk 1 7:1 40578A .014-.016 tdc
8:1 40576A .014-.016 2 deg
9:1 40617A .014-.016 tdc
XK150 3.4 Ltr 7:1 40578A .014-.016 4 deg
8:1 40576A .014-.016 6 deg
9:1 40617A .014-.016 5 deg
XK150S 3.4 L 8:1 40670A .014-.016 9 deg
9:1 40616A .014-.016 9 deg
XK150 3.8 Ltr 8:1 40640A .014-.016 7 deg
9:1 40665A .014-.016 7 deg
XK150S 3.8 L 9:1 40617A .014-.016 10 deg
Mark IX 7:1 40640A .014-.016 4 deg (tdc w/paper air cleaner)
8:1 40640A .014-.016 4 deg (7 deg w/paper air cleaner)
9:1 40665A .014-.016 5 deg
2.4 Ltr Mk 2 7:1 40557A .014-.016 6 deg
8:1 40528A .014-.016 8 deg
3.4 Ltr Mk 2 with oil bath air cleaner
7:1 40578A .014-.016 tdc
8:1 40576A .014-.016 2 deg
9:1 40617A .014-.016 tdc
3.8 Ltr Mk 2 with oil bath air cleaner
7:1 40640A .014-.016 tdc
8:1 40640A .014-.016 4 deg
9:1 40665A .014-.016 10 deg
3.4 and 3.8 Ltr Mk 2 with paper air cleaner
7:1 40640A .014-.016 tdc
8:1 40640A .014-.016 7 deg
9:1 40665A .014-.016 5 deg

I have double checked this for my own typing errors, but an error by Vandiest is always a possibility.

Rob Reilly


If you have any questions or comments send e-mail to: ted@jag-lovers.org
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