Camshaft
The camshaft is five-bearing.
The maximum axial displacement of the camshaft with the tappets removed and the bearing caps installed from the 1st to the 5th, mm: 0.15.
Radial runout of shaft journals, no more than, mm: 0.01.
The camshaft of EP and OT engines is marked with a blue belt applied between the first and second cams.
Spare parts are supplied with polished camshafts complete with bearings. In this case, the camshaft is marked with a yellow mark.
Diameter of camshaft journals, mm:
- nominal: 26.00;
- repair size: 25.75.
Valve timing (with a calculated zero clearance between the camshaft lobes and shims and a valve lift of 1 mm)
With the correct installation of the gas distribution mechanism, the label «ABOUT», corresponding to the TDC of the end of the compression stroke of the 1st cylinder on the flywheel, must be aligned with the mark on the clutch housing, and the mark on the camshaft pulley must be against the mark on the intermediate shaft pulley.
Intermediate shaft
The intermediate shaft is driven by a toothed belt from the crankshaft pulley. The intermediate shaft drives the fuel pump, the ignition distributor and the oil pump.
Intermediate shaft journal diameter, mm:
- anterior: 42.95;
- rear: 41.95.
Timing belt for camshaft drive
Make and type: Pirelli 121 R 180 or Uniroyal Powergrip 41121.
The belt tension is considered normal if, in the middle of the branch between the camshaft and intermediate shaft pulleys, the belt is twisted no more than 90°by the force of the thumb and forefinger.
Visitor comments