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 block without cylinder liners, or aluminium alloy block with cast iron 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
35o angle between inlet valve and vertical
35o 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

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SU HD8 Carburetor

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Lucas Mk I injection distributor

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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.
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