Jaguar XK Cylinder Heads and Applications


Designation
Color
Application
(Engine Prefix)
Valving
Intake x Exhaust
Valve Seat Angle
Intake x Exhaust
Cam Lift
A1
Silver XK120 (W)
Mark VII (A,B,D)
2.4 Saloon (BB)
1 3/4 x 1 7/16
30 x 45
5/16
A
Silver XK120SE (W,F)
Mk VIIM (A,D,N)
XK 140 (G)
2.4SE (BB,,BC,BE)
150 3.4 (V)
1 3/4 x 1 1/2
30 x 45
3/8
B1
Lt Blue/Green
(Eggshell)
3.4 Saloon (KE,KF)
Mk VIII (N, NA)
XK 150 SE (V)
Mk 2 2.4 (BG,BH,BJ)
Mk 2 3.4 (KG,KH,KJ)
S Type 3.4 (7B)
1 3/4 x 1 5/8
30 x 45
3/8
B
Metallic Blue Mk IX (NC)
XK150 3.8 (VA)
Mk 2 3.8 (LA,LB,LC,LE)
S Type 3.8 (7B)
1 3/4 x 1 5/8
45 x 45
3/8
C
Red C Type (E)
XK 140 SE(G)
1 3/4 x 1 5/8
30 x 45
3/8
C
Silver C Type (E)
1 7/8 x 1 5/8
30 x 45
3/8
D
Silver D Type 3.4(E)
1 7/8 x 1 5/8
30 x 45
3/8
D Wide Angle Silver D Type 3.4(E)
1 29/32 x 
1 11/16
45 x 45
7/16
D Wide Angle Silver D Type 3.8(E)
2 x 1 11/16
45 x 45
7/16
D Wide Angle Silver Ltwt E-Type 3.8 2 3/32 x 1 11/16
45 x 45
7/16
Straight Port
(Early)
Gold (Late) or
Pumpkin (Early)
XK 150 3.4S(VS)
XK 150 3.8S(VAS)
Mark X 3.8 (ZA,ZB)
E-Type 3.8 (R, RA)
Mk X 4.2 (7D)
E-Type 4.2 (7E)
1 3/4 x 1 5/8
45 x 45
3/8
Straight Port Silver 420 (7F)
240 (7J)
340 (7J)
420G (7D)
E-Type 4.2  Ser II(7R)
XJ6 2.8  Ser I(7G)
XJ6 4.2 Ser I (7L)
XJ6 4.2 Ser II (8L)
XJ6 3.4 Ser II (8A)
XJ6 3.4 Ser III (8A)
XJS 4.2(8S)
1 3/4 x 1 5/8
45 x 45
3/8
Straight Port
(Fuel Injection)
Silver XJ6 4.2 Ser III (8L)
1 7/8 x 1 5/8
45 x 45
 

3/8

 

    Generally, heads will interchange, but the easiest swaps are within generations. Accuracy can't be guaranteed. Please contact author with corrections.

Copyright©2002 Michael Frank