Transmission Clutch

19 Piston in slave cylinder The clutch and service brakes are operated by suspended pedals, which are mounted on a common shaft. By mounting plates on the pedals, the distance to the pedals can be reduced by 15 to 30 mm. The clutch pedal (1) rides on the shaft with two needle bearings to keep the operating force as low as possible. An over-center spring reduces pedal effort from approx. 21 kp to 14 kp. In the released position, the spring's force will be slightly in the direction of the pedal...

Short Drive Shaft with Coupling and Bearing

The following changes have been made On vehicles with manual transmission, the short drive shaft (15) has been lenghtened to 197 mm (was 167 mm). The coupling (16) has been lengthened to 130 mm (was 90 mm), furthermore the coupling clamping bolts now have a hexagon alien head (previously a 12-point alien head). The long drive shaft (6) has been shortened and runs in three bearings (previously two bearings). The dr ive shaft runs in two bearings on vehicles with automatic transmission KRAFT...

Preheating for Crankcase Vent

Porsche 996 Engine Timing Diagram

A preheating line runs for a short distance in the hose for the crankcase vent 24 , between the oil separator 14 and air cleaner lower section. The coolant for preheating is taken from the left cylinder head 23 and enters the cooling system again at the thermostat housing. A bleeder line 25 26 connected to the expansion tank is used to bleed the radiator and engine circuit. The temperature sensor 9 and thermo time switch for the cold start valve 10 are located in the thermostat housing. The...

Hydraulic Valve Lifters

If there is clearance between the cam and lifter, return spring 3 presses the lifter up 1 so that the clearance is eliminated. This movement lowers the pressure in pressure chamber 4 . Because of this low pressure and the engine oil pressure, the check valve 6 opens and oil can flow into the high pressure chamber. As the valve is opened by the cam lobe, the pressure in the pressure chamber 4 increases and closes the check valve 6 . A small amount of oil leaks out through the gap 7 thus...