Jaguar XK6 R "Straight Port" 3.8 lt (1962)

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Specifications

Introduced in 1962
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Dimensions

Cylinders arrangement: inline 6
Strokes: 4
Bore x Stroke: 92.1 mm x 106.0 mm, 3.626" x 4.173"
Capacity: 3781cc, 258.5ci
Compression ratio: 9.0:1 or 9.5:1

Construction materials

Cast iron or aluminium alloy block with cast iron wet cylinder liners
RR50 aluminium “Straight Port" type cylinder-head with hemispherical combustion chambers and orange or gold cam cover
EN16 steel crankshaft with 7 main bearings
Steel connecting rod

Cylinder-head

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Dual overhead camshafts (DOHC), chain driven with 2 stage double chains
2 valves / cylinder - 12 valves total
35^o angle between inlet valve and vertical
35^o angle between exhaust valve and vertical
44.5mm inlet valve diameter
41.3mm exhaust valve diameter

Aspiration

Natural with

• 3 x SU HD8 Carburetors
• 3 x Weber 45 DCOE Carburetors
• Lucas Mk. I mechanical multi-point Fuel Injection

Ignition

Firing order, 1 - 5 - 3 - 6 - 2 - 4, with number 1 cylinder being at the rear of the engine (flywheel)
Mallory dual points distributor and Lucas Sport coil. MSD6AL capacitive discharge ignition system. Accel Hi Temp SuperStock Spiral Core 8mm spark plug wires
Delco Remy alternator
Spark plug gap 0.56mm
Contact breaker point gap 0.30mm

Cooling and lubrication

Water cooled, cooling fluid capacity 14 lt
Wet sump with a Hobourn-Eaton eccentric-lobe oil pump, dry sump with four-stage oil pump, oil capacity 13 lt, Mocal OT2 oil cooler thermostat. WIX oil filter, remotely mounted

Torque values

Bolts	Foot Pounds	kg.m
Cam bearing caps	15	2
Connecting rod caps	37	5.1
Main bearing cap	83	11.5
Cylinder head nuts	54	7.5
Flywheel	67	9.3

Models used and Output

Year	Model	Induction	Compression ratio	Power	Torque
1959	Lister Costin Coupe	3 x Weber 45 DCOE	9.5:1	306 HP / 228 KW @ 5500 rpm	434 Nm / 320 ft lbs @ 4500 rpm
1962	Jaguar E Type	3 x SU HD8	9.0:1	265 HP / 198 KW @ 5500 rpm	349 Nm / 257 ft lbs @ 4000 rpm
1962	Jaguar E Type Lightweight	Lucas Mk I injection	9.0:1	344 HP / 257 KW @ 6800 rpm

Drawings

Source
Source
Source

SU HD8 Carburetor

Source

Lucas Mk I injection distributor

Source
1. Depression chamber cover and fixing screws (2 off).
2. Centre (minimum fuel) screw and locking nut.
3. Intermediate calibration screw and locking ring.
4. Outer calibration screw and locking ring.
5. Depression chamber fixing screws and washers (4 off) and unit part number plate.
6. Depression chamber body.
7. Overfuel lever bracket stop.
8. Outer calibration spring.
9. Calibration spring carrier.
10. Inner calibration spring.
11. 1/4 UNF nut.
12. Thrust plate.
13. Diaphragm support.
14. Diaphragm.
15. Diaphragm support plate.
16. Spherical bearing and datum link arms pivot.
17. Datum link arms.
18. Datum rollers - 2 outer I inner.
19. Datum link arm circlips.
20. Roller and link arm circlips.
21. Body assembly.
22. Overfuel lever pivot.
23. Overfuel lever return spring.
24. Washer
25. Overfuel lever.
26. Circlip.
27. Overfuel lever assembly (with adjustment cam follower) screw
28. 1/4 UNF nut.
29. Spring washer.
30. Overfuel lever.
31. Cam follower adjustment screw.
32. Spring washer.
33. No. 6 UNC nut.
34. Spacer.
35. Datum track pivot arm assembly.
36. Datum track.