Self-Study Programme 248 The W Engine Concept - VolksPage.Net

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52 Service Sealing concept Each of the cylinder heads is sealed off from the valve covers by a rubber gasket, from the contact faces of the intake manifold by an elastomer gasket, from the exhaust manifolds by a two layer embossed metal gasket and from the crankcase by a multilayer embossed metal gasket. Multilayer metal/elastomer composite gasket between cylinder head and intake manifold contact face Liquid gasket between oil sump upper section and lower section The gasket between the bearing support and the oil sump upper section is also designed as a single layer embossed metal gasket. The oil pan upper section and lower section as well as the crankcase upper section and the bearing support are sealed by means of a liquid gasket. S248_148 Rubber gasket between cylinder heads and valve covers Two-layer embossed metal gasket between cylinder heads and exhaust manifold Multilayer embossed metal gasket between cylinder heads and crankcase Liquid gasket between crankcase upper section and bearing support Coated embossed metal gasket between oil sump upper section and bearing support
Liquid gaskets Application of the liquid gasket sealant is CNCcontrolled in order to ensure a constant sealant supply. The liquid gasket between the lower timing case cover and the upper timing case cover is applied according to a different principle. In this case, the parts are first bolted, then the sealant is injected into the groove in the upper timing case cover via screw nipples (Sealing Injection System). Lower timing case cover (sealing flange) Screw nipple for liquid gasket installation Upper timing case cover S248_140 When enough liquid sealant has been injected, the excess sealant is discharged from the openings on the end of the timing case cover. The screw nipples remain in the housing after injecting the sealant. However, they have to be replaced when repairing the gasket. Outlet S248_153 Screw nipple Groove for sealant S248_152 S248_151 Upper timing case cover (covering part) 53
Page 1 and 2: Service. Self-Study Programme 248 T
Page 3 and 4: At a glance Introduction . . . . .
Page 5 and 6: The W principle To illustrate the p
Page 7 and 8: The modular design principle of the
Page 9 and 10: Comparing the 12-cylinder crankshaf
Page 11 and 12: S248_018 Engine code BDN Dimensions
Page 13 and 14: S248_020 [Nm] 800 700 600 500 400 3
Page 15 and 16: The engine in detail To familiarise
Page 17 and 18: The crankcase lower section The cra
Page 19 and 20: Conrods and pistons S248_016 Trapez
Page 21 and 22: There is a groove at the gear wheel
Page 23 and 24: Two-mass flywheel S248_061 A spring
Page 25 and 26: The 4 valves in each cylinder are a
Page 27 and 28: The secondary air ducting system Be
Page 29 and 30: The camshaft timing control Like th
Page 31 and 32: Retard adjustment The solenoid valv
Page 33 and 34: In the W12 engine, the hydraulic be
Page 35 and 36: Schematic diagram of the oil circui
Page 37 and 38: The oil circuit based on the dry-su
Page 39 and 40: The oil pump is mounted from below
Page 41 and 42: Lubrication of the conrod bearings
Page 43 and 44: Coolant circuit of W12 engine Right
Page 45 and 46: Coolant pump with pump gear S248_11
Page 47 and 48: W12 engine Intake manifold upper se
Page 49 and 50: W12 engine Diaphragm valve, right O
Page 51: Tailpipes Rear silencer Exhaust sys
Page 55 and 56: Place the copper coloured chain lin
Page 57 and 58: Notes 57
Page 59 and 60: 5. Why does the W8 engine have a ba
Page 61 and 62: 13. Which of the following statemen
Page 63 and 64: 14.) a 13.) a 12.) b 11.) a, c 10.)

Self-Study Programme 248 The W Engine Concept - VolksPage.Net

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