Tatra 603 Service Manual
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Motor
Compression ratio 6.5:1
Engine power (max) with air filter without an exhaust silencer after running in.
95HP - 3% at 4800 rpm
Max engine speed of 5000 rev / min
Mean piston speed at max speed 11.9 m/sec
Mean Effective Pressure max 7.82 kg / cm2 at 3500 rev / min
Capacity of combustion chamber approx 59 cm ^ 3
* Compression pressure. - 7.0 kg / cm ^ 2 (in the range of 100 to 200 rev / min = revolutions powered
by engine starter motor)
Maximum torque 15.8kgm at 3000 rev / min (=115 lb')
Specific fuel consumption at 100% load approx 2000 to 3500 rev / min 245 g/kh UNITS!?
Minimum permissible oil pressure in the engine lubricating system 1.5 kg / cm ^ 2 at 2000 rev / min and an
oil temperature of 80c
Normal oil pressure, 4bar at 4000 rev / min
Green indicator light goes out when the oil pressure drops to about 1.8, bar.
* Compression pressure of run in engine in good condition, pressure gauge connected to any cylinder
through spark plug hole. Spark plug from all other cylinders must be removed.
engine power
torque
Fuel consumption
Valve timing
Inlet valve opens 15 deg before TDC
Inlet valve closes 55 deg after BDC
Exhaust valve opens 50 deg before TDC.
Exhaust valve closes 20 deg after BDC
Note: HU - TDC. DU - Bottom Dead Centre
Valve clearance cold engine: Inlet 0.10 mm. Exhaust 0.15 mm
Cylinders
Nominal cylinder bore diameter 75 mm
Bore tolerance (in individual groups A – D sorted by dimensions + 0.01 mm - 0.00 mm
The maximum permissible bore 75.75 mm
Capacity per cylinder 318 cm ^ 3
VALVES
Valve springs
Inlet / Exhaust
The diameter of the valve stem 9f7 / 9e7
Valve guide bore 9f7 / 9f7
Valve guide - stem clearance 0.026 mm and 0.056 / mm and 0.068 mm 0.036
Maximum allowable clearances at 0.1 mm / 0.1 mm wear
Maximum allowable weakening of the valve stem after regrinding 0.5 mm /0.5 mm
The total length of the valve 102h11 / 101h11
Head diameter (Plate) valve 39h11 / 36h11
Valve seat angle 90 deg +/- 1 deg
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