Basic element of system of gas distribution is the cam-shaft located in a head of the block of cylinders and put in action by a gear belt from a bent shaft.
The gas distribution phases (measured at a working gap of valves):
– OZD: 6 ° before VMT; – ZZD: 32 ° after NMT; – OZW: 57 ° before NMT; – ZZW: 7 ° after VMT.
OZD and ZZD – respectively opening and closing of the inlet valve; OZW and ZZW-respectively opening and closing of the final valve.
Cam-shaft
The cam-shaft leans on five bearings containing thin-walled inserts.
Raising of valves:
– inlet: 10 mm; – final: 9 mm.
Axial side play: 0,1–0,2 mm.
Diameter of necks of bearings: 27,960–27,980 mm.
Gap in cam-shaft bearings: 0,020–0,079 mm.
Gear belt
The gear belt puts a cam-shaft, an intermediate shaft and the pump of cooling liquid in action.
Brand: Motorcraft.
Tension: it is regulated by automatically roller tension device.
Frequency of replacement: each 60 000 km of a run. |