Lower engine compartment protection
Rear of the engine compartment
1 - Bolt
Central part of the engine compartment
1 - Bolt
Front of the engine compartment
1 - Bolt
A - Right front trim
B - Left front trim
Engine Components 112 and 113
1 - Cylinder block; 2 - Cylinder heads; 3 - Cylinder head gaskets; 4 - Cylinder head covers; 5 - Cylinder head cover gaskets; 6 - Inlet valves; 7 - Exhaust valves; 8 - Valve levers; 9 - Valve lever axles; 10 - Upper valve spring seat; 11 - Valve spring; 12 - Lower valve spring seat; 13 - Valve crackers; 14 - Oil deflector caps; 15 - Auxiliary tube for fitting the oil deflector cap; 16 - Valve lifters; 17 - Valve seat; 18 - Camshaft; 19 - Front timing belt cover; 20 - Camshaft sprocket; 21 - Crankshaft sprocket; 22 - Intermediate gear; 23 - Timing chain; 24 - Tensioner; 25 - Chain tensioner shoe; 26 - Chain tensioners; 27 - Piston rings; 28 - Piston; 29 - Connecting rod pin bushing; 30 - Connecting rod; 31 - Connecting rod bearing shells; 32 - Front crankshaft oil seal; 33 - Bearing shells; 34 - Thrust half rings; 35 - Crankshaft; 36 - Rear crankshaft oil seal; 37 - Cover with rear crankshaft oil seal; 38 - Torsional vibration damper; 39 - Crankshaft pulley; 40 - Oil pan; 41 - Oil pump; 42 - Oil pump sprocket; 43 - Oil pump drive chain; 44 - Tensioner lever; 45 - Tensioner spring; 46 - Finger; 47 - Oil cooler
Intake manifold elements
19 - Inlet manifold; 19/1 - Bolt; 19/3 - Gasket; 89 - EGR valve; 89/2 - EGR valve tube; 6 - Combination valve; The arrow indicates the hole for the combination valve
Variable Geometry Intake Manifold Air Flows 12
22 - Control flap; A - Air intake with the damper open; B - Air intake with the damper closed; C - To the engine; D - Air from the air filter
Intake and exhaust control on petrol engines 112 and 113
12 - Inlet manifold; 17 - Fuel line; 19 - Exhaust manifold; 22 - Resonant damper; R4 - Spark plugs (double sparking); Y62 - Injector
(Article text obtained from the website: «mercedesman.ru»)
General view of engine 113, equipped with an intake manifold 12 with variable geometry on (S430 and S500)
The underbody protection and main components of the 112 and 113 engines are shown in the illustrations.
The mechanism of gas distribution of gasoline engines is shown in the illustration. 3 valves are used (2 inlets and 1 outlet) and 2 spark plugs for each cylinder. A special device allows you to disable valve control to reduce fuel consumption (refer to the materials in Chapter Power and exhaust systems). The resonant intake manifold changes its length for each cylinder individually by means of electronically controlled flaps with servo drives.