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B1BBM2K1 - 806 DW10ATED ENGINE

ENGINE INTRODUCTION DW10

1 - DESCRIPTION

Main structure of the DW10 engine :

·         diesel engine with direct injection

·         power train angle (on new vehicles homologated from 1998, new standards relating to impacts impose a straightening of the engines in the front of vehicles)

·         1 overhead camshaft driven by a toothed belt

·         4 cylinders in line - 8 valves

·         high pressure pump driven by a toothed timing belt

·         coolant pump driven by a toothed timing belt

·         oil filler hole incorporated in the cylinder head cover

·         suction draining system

·         engine fitted with an acoustic cover

There are 2 versions of this engine :

·         DW10 ATED : with air/air exchanger

·         DW10 TD : with no exchanger

The DW10 ATED engine is an improved version of the DW10TD engine, This power and torque improvement is obtained through management of the turbocharger pressures by the electronic injection ECU .

2 - IDENTIFICATION

(A) Identification marking comprising :

·         (1) unit reference

·         (2) legislation type

·         (3) build order number

3 - DATA

4 - CYLINDER BLOCK

Cylinder block :

·         in cast iron (not lined)

·         85 mm diameter barrels

·         fitted with piston base jets

·         fitted with 5 main bearing caps hollowed out at (B) to make the cylinder block lighter

·         8 mm thick inter-cylinder with coolant passage hole at (C) and coolant plate at (D) to assist cooling of the top of the barrels

·         fitted with a coolant drain plug on the rear face

The cylinder block is identical for both the DW10 ATED and DW10TD engines and is differentiated by the engine engraving (Legislation type) .

NOTE : no. cylinder-number 1 : clutch end (flywheel) .

5 - CRANKSHAFT AND CONNECTING RODS

(4) Crankshaft .

(5) Top half shells .

(6) Bottom half shells .

(7) End float thrust washer .

(8) Piston .

(9) Gudgeon pin .

(10) Stop ring .

(11) Connecting rod .

(12) Big end bearing shell .

5 - 1 - CRANKSHAFT

DW10 ATED engine :

·         crankshaft (identical to XUD9TE engine)

·         in burnished steel

·         with 5 bearings

DW10 TD engine :

·         crankshaft (identical to XUD7TE engine)

·         material : steel

·         with 5 bearings

Front and rear sealing is by lip seals .

The end float (between 0.07 and 0.32 mm) is adjusted on bearing no. 2 by 4 thrust washers (2 on the cylinder block side and 2 on the crankshaft cap side) .

5 - 2 - CRANKSHAFT HALF SHELLS

Crankshaft half shells :

·         identical to XUD9TE engine

·         smooth on the main bearing cap side

·         grooved on the cylinder block side

5 - 3 - CONNECTING RODS

New connecting rods (145 mm between centres) (Identical to DW8 engine) :

·         forged steel connecting rods

·         the little end is fitted with a machined bronze bush in the shape of a snake's head

·         smooth connecting rod half shells with tab

5 - 4 - PISTONS

(E) : Flywheel end .

(F) : Timing gear end .

Special pistons with dome and central cavity (BOWL) necessary for the movement of the gases (SWIRL) .

New light alloy pistons with valve cut-outs .

The direction is given by the valve stamp (stamp on the side opposite the oil filter) .

There is only one piston diameter category (Series) .

There is only one piston diameter category (Repair) .

One weight category, obtained by internal reworking of the pin .

The floating gudgeon pin is retained by 2 rings .

The piston has a steel insert to reinforce the compression ring groove .

5 - 5 - PISTON RINGS

The piston has 3 rings :

·         upper sealing ring (13): double trapezoid compression ring (thickness = 3.5 mm)

·         lower sealing ring (14): curved (thickness = 2 mm)

·         scraper ring (15): with spiral spring (thickness = 3 mm)

5 - 6 - FLYWHEEL

Flywheel (Adapted for each vehicle) :

·         in cast iron with lamellar graphite

·         friction plate diameter 275 mm

·         the edge of the flywheel has 60 teeth of which 2 have been omitted to determine Top Dead Centre

5 - 7 - ACCESSORIES PULLEY

A pulley for versions without air conditioning (damped hub with no torsion uncoupling step) .

A pulley for versions with air conditioning (damped hub with torsion uncoupling step) .

These pulleys are secured to the crankshaft by 1 bolt (Identical to XUD) .

6 - CYLINDER HEAD ASSEMBLY

6 - 1 - CYLINDER-HEAD COVER (16)

The cylinder head cover (16) is made from a composite material, it is fitted with a pre-formed removable seal .

The oil filler hole is incorporated in the cylinder head cover .

6 - 2 - CAMSHAFT BEARING CASTING (17)

The camshaft main bearing cap housing (17) is made from a light alloy .

Cap housing/cylinder head sealing is by CAF 33 type sealing compound .

The camshaft is positioned in the cylinder head by the studded cap housing, with 5 main bearings .

The end float adjustment of the camshaft is on bearing no. 3 (Bearing no. 1 on the flywheel end) .

6 - 3 - CYLINDER HEAD (18)

A new cylinder head (18) : 2 valves per cylinder .

Height of new cylinder head : 133 mm .

Maximum cylinder head bow : 0.03 mm .

The inlet ducts in the cylinder head are a complex helical shape to form the SWIRL .

The valve seats and guides are new and made from sintered steel .

NOTE : tightening is in a SPIRAL sequence .

6 - 4 - INJECTORS

The base of each injector resembles the conventional multi-hole model (with specifications adapted to the engine version, for example: 5 holes, 0.16 mm in diameter or 5 X 0.20 or 6 X 0.15) .

There is a control solenoid valve on the top .

NOTE : always replace the copper seal, installed in the cylinder head (after repair) .

6 - 5 - THE CAMSHAFT

The camshaft :

·         this drives the vacuum pump (flywheel end)

·         it engages the roller cam followers which operate the valves

The hydraulic tappets permit wear take-up maintaining a zero clearance between the camshaft, the cam followers and the valves .

Lubrication is via a longitudinal channel .

Side channels direct the oil to the bearings and cams .

End float value : 0.07 mm to 0.38 mm .

6 - 6 - CYLINDER HEAD GASKET

(G) : Thickness identification .

There are 5 categories of laminated metal cylinder gaskets .

The cylinder head gasket fits both DW10 ATED and DW10 TD engines .

Method for selecting the gasket by measuring the piston protrusion (Identical to DW8 engine) .