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365GT4 400 400i 412
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412 engine:
 Type Colombo 60º V12
 Type number F 101 AC 000
 Capacity 4943 cc
 Bore and stroke 82 mm x 78 mm
 Compression ratio 9.6:1
 Maximum power 340 bhp @ 6000 rpm
 Maximum torque 333 lb ft (43.5 kgm) @ 4200 rpm
 Oil pressure 78-92 psi (5.5-6.0 kg/cm²) @ 6800 rpm
 Cylinder block and head Light alloy construction
 Timing gear (per bank) Twin overhead camshafts
 Valves 2 valves per cylinder
 Fuel injection Twin Bosch K-Jetronic systems
 Ignition Marelli Microplex electronic unit
 Firing order 1-7-5-11-3-9-6-12-2-8-4-10
 Spark plugs Champion N6GY

Valve Timing
Valve timing should be measured with a clearance of 0.5 mm between tappet bucket and the camshaft lobe.
 Inlet valves open xxº BTDC
 Inlet valves close xxº ABDC
 Exhaust valves open xxº BBDC
 Exhaust valves close xxº ATDC
 Valve clearance - Inlet
                           Exhaust
 0.10 mm to 0.15 mm
 0.25 mm to 0.30 mm