| Jaguar Tune-Up
Specifications |
(6 Cylinder)
Spark plug:
gap 0.025
type Champion UN 12Y (3.8)
Champion UN 11Y (4.2)
torque 27 ft.lb.
Ignition timing:
3.8, 4.2 (S.U. Carbs) 5 degrees BTC
4.2 (Stomberg Carbs*) 5 degrees BTC (static)
10 degrees BTC (1,000 rpm with
(vacuum advance disconnected)
Idle speed:
3.8 500 rpm
4.2 (S.U.Carbs)
Manual gearbox 700 rpm
Automatic 600 rpm (in neutral)
4.2 (Strombergs)
Manual gearbox 750 rpm
Automatic 650 rpm (in neutral)
Point Gap: .025 (.64 mm)
CAM Dwell: 33-37 degrees
Valve Clearances:
Intake: .004 in. (.10 mm)
Exhaust .006 in. (.15 mm)
Firing Order: 1,5,3,6,2,4 (Note: #1 piston is at the rear of the engine)
E-TYPE Series III Tune-up Specifications
(12 cylinder)
Spark Plugs
Make Champion N9Y
Gap 0.025 in
Distributor
Breakerless ignition.
Pickup module-to-timing rotor gap is 0.021-0.022in
Timing 12 degrees BTD (vacuum ret. disconnected)
Valve Clearances
Intake 0.012 - 0.014
0.014 - 0.016 (1973-74) (1)
Exhaust 0.012 - 0.014
0.014 - 0.016 (1973-74) (1)
(1) Req. for legal emission levels. Valve train noise will increase
XJ6 Series III Tune-up Specifications
Spark Plugs:
Ser II Make Champion N11Y
GAP 0.035 in (.89 mm) - Fuel Inj
0.025 in (.63 mm) - Carbed Engines
Ser III Make Champion N12Y
Gap 0.025 in (.63mm) - Pre '81
0.035 in (.89 mm) - Post '81
Timing: 8 degrees BTC (Static)
Idle Speed: 750 rpm
Valve Clearance (Intake & Exahaust): 0.012 -0.014 in (0.305 - 0.356 mm)