Vlado cherokee j8s.pdf - VWClub.BG

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ENGINE AND PERIPHERALS Overhauling the engine 10 Value of the piston-cylinder head clearances Form this dimension (piston - valve), subtract the valve clearance value measured earlier; the result (piston - cylinder head clearance) should be more than 0.6 mm. 2) Valve clearance (measurement B) On the inlet and exhaust valves of the 4 th cylinder: Inlet: B = 0.92 mm Exhaust: B = 0.87 mm (The clearance is between 0.80 and 1.15 mm). In this case, use the measurement B = 0.87 mm for the exhaust valve, it being the smaller. Cylinder head fitted on the engine (with the cylinder head gasket and tightened to torque): 3) Valve - piston clearance (measurement C) On the exhaust valve stem of the 4 th cylinder (reminder: piston at top dead centre): C = 1.57 mm Example of completed measurement, cylinder head removed from the engine: 83367S which gives the PISTON/CYLINDER HEAD CLEARANCE: D = C - B = 1.57 - 0.87 = 0.7 mm (This clearance is thus greater than 0.6 mm). 1) Piston protrusion (after turning the crankshaft clockwise at the timing end) (Measurement A): – cylinder n˚ 1, A = 1.05 mm – cylinder n˚ 2, A = 1.04 mm – cylinder n˚ 3, A = 1.05 mm – cylinder n˚ 4, A = 1.07 mm In this case use measurement A = 1.07 mm for cylinder 4. This measurement being greater than 1.04 mm, fit a cylinder head gasket 1.8 mm thick. Refit: – the camshaft (16), – the rocker arm rail (17), – the fuel return rail to the tank, fitted with new copper seals. Downloaded from www.Manualslib.com manuals search engine 10-100
ENGINE AND PERIPHERALS Overhauling the engine 10 Fitting the camshaft seal (timing side) Fit the seal (18) to the mounting bush Mot. 1300. Oil the external diameter of the seal. Fit the assembly on to the camshaft (16). Refit: – the camshaft sprocket and tighten to a torque of 5 daNm, – the injection pump rear mounting by tightening the bolts to a torque of 2.5 daNm (do not tighten the bolts at the front of the pump to carry out the injection pump setting), – Timing tensioning roller. A: fitting dimension with tool Mot. 1300 B: fitting dimension with tool Mot. 1300, and the washer (repair). If the seal lip marks the crankshaft mating face a 1.5 mm thick washer (fitting the tool) must be placed between the seal and the tool to shift the seal. Downloaded from www.Manualslib.com manuals search engine 10-101
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