Jaguar XK6 "D" type head 3.4 (1955)
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Specifications

Introduced in 1955
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Dimensions

Cylinders arrangement: inline 6
Strokes: 4
Bore x Stroke: 83.0 mm x 106.0 mm, 3.268" x 4.173"
Capacity: 3442cc, 210ci
Compression ratio: 9.0:1

Construction materials

Cast iron block without cylinder liners
RR50 aluminium "D" type cylinder-head with hemispherical combustion chambers and red 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
40o angle between exhaust valve and vertical
47.6mm inlet valve diameter
41.3mm exhaust valve diameter

Aspiration

Natural with 3 x Weber 45 DCO3 Carburetors

Ignition

Firing order, 1 - 5 - 3 - 6 - 2 - 4, with number 1 cylinder being at the rear of the engine (flywheel)
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, oil capacity 13 lt

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
1955 Jaguar D Type 3 x Weber 45 DCO3 9.0:1 270 HP / 201 KW @ 6000 rpm 325 Nm / 240 ft lbs @ 4000 rpm

Drawings

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