B1BBM2K1 - 206 DW10TD 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

engine type | DW10 ATED | DW10 TD
--- | --- | ---
engine code | RHZ | RHY
unit reference | vehicle specific
number of cylinders | 4
bore x stroke (mm) | 85 x 88
capacity (cm3) | 1996
compression ratio | 18/1
maximum power (KW - EC) | 80 | 66
maximum power (HP DIN) | 110 | 90
engine speed at max. power (r.p.m.) | 4000
maximum torque (da.Nm - EC) | 25 | 20.5
engine speed at max. torque (r.p.m.) | 2000
turbocharger | vehicle specific
air/air intercooler | yes | no
turbocharger pressure (2000 rpm) | 1 bar(s)
turbocharger pressure (3000 rpm) | 1 bar(s)
injection system | COMMON RAIL
make | BOSCH
type | EDC 15C2
opacity of smoke (m - 1) | specific to : vehicles

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) .

piston protrusion measurements (mm) | thickness (mm) | notch(es) number of holes at (G)
--- | --- | ---
0.47 to 0.604 | 1.30 ± 0.06 | 1
0.605 to 0.654 | 1.35 ± 0.06 | 2
0.655 to 0.704 | 1.40 ± 0.06 | 3
0.705 to 0.754 | 1.45 ± 0.06 | 4
0.755 to 0.83 | 1.50 ± 0.06 | 5

6 - 7 - TAPPETS (OPERATION)

(19) Roller cam follower .

(20) Hydraulic tappet .

(21) Ball joint .

(22) Piston .

(23) Valve .

(24) Return spring .

(25) Return spring .

(26) Barrel .

(27) Lower chamber .

(28) Upper chamber .

The 12 mm diameter hydraulic tappets have automatic clearance take-up .

Cam - valve clearance take-up phase (H - I) :

- if there is a clearance, the ball joint (21) lifts under the action of the spring (25); this results in a vacuum in the lower chamber (27), which opens the valve (23)
- the pressure between the two chambers (27) and (28) is equal; the valve (23) closes under the action of the spring (24), the two chambers are isolated

Compression phase (valve lift) (J) :

- as soon as the cam presses on the cam follower, the pressure increases in the lower chamber (27), the valve (23) is pressed against its seat; the hydraulic tappet is in stop function mode, the movement is transmitted in its entirety to the valve

6 - 8 - VALVES

Special valves :

- inlet (diameter 35.6 mm)
- exhaust (diameter 33.8 mm)

Valve stem (Diameter 5.978 mm) .

6 - 9 - VALVE SPRINGS

External diameter : 20.9 mm .

Number of coils : 9 .

7 - TIMING

7 - 1 - DATA

(29) crankshaft gear (21) teeth .

(30) Coolant pump gear (20 teeth) .

(31) Camshaft gear (42 teeth) .

(32) Camshaft hub .

(33) High pressure pump pinion (42 teeth) .

(34) Roller tensioner (External diameter : 60 mm) .

(35) Manual tensioner roller (60 mm diameter and eccentric radius 7 mm) .

(36) Timing belt .

Timing cover in 3 sections secured by 9 bolt(s) :

- (37) upper cover (4 fastening points)
- (38) high pressure pump casing (3 fastening points)
- (39) lower cover (5 fastening points)

7 - 2 - TIMING BELT

engine code | RHZ | RHY
--- | --- | ---
engine type | DW10 ATED | DW10 TD
width (mm) | 25.4
number of teeth | 141
supplier(s) | DAYCO
material | HSN
identification mark | -
replacement interval (km) in normal conditions of use | 160 000
replacement interval (km) in arduous conditions of use | 120 000

NOTE : the belt is tensioned on fitting by the manual tensioner roller (eccentric) requiring the fitting of the SEEM tension checking equipment .

7 - 3 - HIGH PRESSURE PUMP

The high pressure pump has three radial pistons and is driven in a non synchronous manner by the timing .

8 - LUBRICATION

(K) : Low pressure oil descent circuit .

(L) : Oil vapour descent circuit from the top of the engine .

(M) : High pressure oil ascent circuit .

(N) : Low pressure oil descent circuit .

(O) : Oil vapour descent circuit from the top of the engine .

(P) : High pressure oil ascent circuit .

8 - 1 - OIL CAPACITY

depending on the use of the vehicle, the engine can be tilted or straightened: adaptation to each vehicle .

straight engine
engine code | RHY - RHZ | RHY - RHZ
--- | --- | ---
special features | air conditioning | without air conditioning
oil capacity (with filter) | 4.5 | 4.5
oil capacity (without filter) | 4.2 | 4.2

tilted engine
engine code | RHY - RHZ | RHY - RHZ
--- | --- | ---
special features | air conditioning | without air conditioning
oil capacity (with filter) | 4.25 | 4.25
oil capacity (without filter) | 4 | 4

IMPERATIVE : always check the oil level using the dipstick .

Oil change interval (Engine oil) : Refer to the maintenance documents .

8 - 2 - ENGINE OIL FILTER CARTRIDGE

Oil filter cartridge (First assembly) :

- PURFLUX LS 867A (diameter 76 mm)

Oil filter cartridge (Spare) :

- PURFLUX LS 867B (diameter 76 mm, valve : 1.5 bar(s))

Replacement interval (Engine oil filter cartridge) : Refer to the maintenance documents .

8 - 3 - LUBRICATION SYSTEM

The piston bases are cooled by jets .

Engine oil pressure at 80°C measured in place of the pressure switch .

engine code | RHZ | RHY
--- | --- | ---
check 1 minimum pressure (bar(s)) | 1000 rpm 2 | 1000 rpm 2
check 2 minimum pressure (bar(s)) | 2000 rpm 2.8 | 2000 rpm 2.8
check 3 minimum pressure (bar(s)) | 3000 rpm 3.8 | 3000 rpm 3.8
check 4 minimum pressure (bar(s)) | 4000 rpm 4 | 4000 rpm 4

8 - 4 - ENGINE OIL CHANGE

The engine oil must be changed with the engine hot just after switching off the engine .

The engine can be drained by suction (End piece ø 14 mm) .

It is still possible to drain the engine by removing the drain plug from the sump .

9 - AIR SUPPLY CIRCUIT

9 - 1 - THE INDUCTION CIRCUIT

(40) Exhaust manifold (Cast iron) .

(41) Inlet manifold (Aluminium alloy) .

(42) EGR valve .

(43) EGR valve/manifold connection pipe .

(44) The air inlet hose (Aluminium alloy) .

(45) Vacuum pump .

The Exhaust Gas Recirculation pipe is secured by :

- 1 clic clip(s) on the EGR valve (42)
- 2 bolt(s) on the air inlet union (44)

The EGR valve (42) is secured by 2 bolts on the exhaust manifold (40) .

9 - 2 - EXHAUST GAS RECIRCULATION

The role of the EGR system is to reduce the amount of nitrous oxide (NOx) expelled in the exhaust gases .

The nitrous oxides are produced by the combination of the nitrogen and the oxygen in the intake air under the effect of a very high temperature (greater than 1800 degrees C) .

During certain phases of operation the EGR reduces the amount of oxygen available in the cylinder .

The EGR valve (42) is subjected to a vacuum from the vacuum pump (45) secured at the end of the camshaft and this authorises recirculation of the exhaust gases to the air union (44) .

The recirculation is of the progressive type managed by mapping .

The opening of the EGR valve (42) is controlled by the EGR solenoid valve which is managed by the engine management control unit which receives the following data :

- coolant temperature
- engine speed
- engine load (the position of the accelerator pedal)

9 - 3 - TURBOCHARGER PRESSURE REGULATION SOLENOID VALVE

(42) EGR valve .

(45) Vacuum pump .

(46) Turbocharger pressure regulation solenoid valve .

(47) EGR solenoid valve .

(48) Turbocharger .

(49) Turbo regulation valve .

Controlled by the ECU, this solenoid valve enables it to regulate the intake pressure via the turbo regulation valve (49) .

10 - PRE-POST HEATING

(1150) Pre-heat control unit .

(1160) Glow plugs .

(1320) Engine management control unit .

(V1150) Pre-heat warning lamp .

10 - 1 - PRE-HEATING

As soon as ignition is switched on : The engine management control unit supplies the glow plugs and controls the lighting of the warning light on the instrument panel, depending on the coolant temperature; The pre-heating time varies depending on the coolant temperature .

NOTE : the warning light on the instrument panel only comes on during the pre-heating phase; it comes on for the duration of the pre-heating .

coolant temperature | pre-heating time (second(s))
--- | ---
-30°C | 20
-10°C | 5
0°C | 0.5
+18°C | 0

If the starter is not operated, when the warning light goes out, the glow plugs remain supplied for a maximum of 10 seconds .

During the starting phase, the glow plugs are supplied under the following conditions :

- the coolant temperature is below 20 degrees C
- the engine runs at more than 70 rpm for 0.2 second(s)

10 - 2 - POST HEATING

Post-heating consists of prolonging the operation of the glow plugs for a maximum of 60 seconds from the end of the starting phase .

Parameters which could interrupt post-heating :

- coolant temperature greater than 20 degrees C
- flow injected greater than 35 mm3
- engine speed above 2000 rpm

11 - FUEL SYSTEM

11 - 1 - PRESENTATION

This engine is fitted with a new COMMON RAIL direct injection system from BOSCH .

(50) Fuel tank .

(51) Scavenge pump .

(52) Fuel filter .

(53) High pressure pump .

(54) Common rail .

(55) Injector .

(56) Diesel pressure sensor .

(57) Diesel temperature sensor .

(58) Third piston de-activator .

(59) Diesel high pressure regulator .

(Q) To coolant outlet housing .

11 - 2 - FILTRATION RESERVOIR ASSEMBLY

(E1) Diesel inlet from tank .

(E2) Diesel inlet from coolant outlet housing .

(S1) Diesel outlet : To coolant outlet housing .

(S2) Diesel outlet : To high pressure pump .

(S3) Diesel outlet to tank (return circuit) .

(60) Bleed screw (Water in diesel fuel) .

(61) Low pressure regulator .

(62) Filtering element .

(63) Thermostatic element .

Filtration of impurities bigger than 5 microns .

Replacement interval (Diesel filter cartridge) : Refer to the maintenance documents .

11 - 3 - DIESEL HEATER

The fuel is heated by the cooling circuit (on the coolant outlet housing) .

The temperature of the fuel is regulated by a thermostatic element (63) (incorporated in the filtration reservoir) .

11 - 4 - OPERATING PHASE (THERMOSTATIC ELEMENT)

The thermostatic element (63) is a bimetallic strip which deforms according to the temperature of the fuel .

Fuel temperature below 15 degrees C :

- the bimetallic strip (63) closes the direct passage to the filter
- the fuel is directed to the coolant outlet housing to be heated before filtering

Temperature between 15 and 25 degrees C :

- the bimetallic strip (63) divides the intake flow: one part of the fuel passes directly towards the filtering element (62), the other continues to be heated

Temperature above 25 degrees C :

- the bimetallic strip (63) closes the direct passage to the heating circuit: all the fuel is directed to the filtering element

11 - 5 - LOW PRESSURE REGULATOR

The scavenge pump (51) generates a supply pressure of 2.25 ± 0.25 bars .

The low pressure regulator (61) regulates the pressure after filtration of the diesel to 1.25 ± 0.25 bars .

12 - COOLING SYSTEM

12 - 1 - SCHEMATIC DIAGRAM

(64) Expansion chamber .

(65) heater matrix .

(66) Water outlet housing .

(67) Water inlet housing .

(68) Coolant pump (To cylinder block) .

(69) Bleed screw .

(70) The cooling radiator .

(71) Water/fluid heat exchanger (12 blades) .

(72) Water circuit heater (Additional heating) .

13 - DRIVING THE ANCILLARIES

There are 2 possibilities (depending on the vehicle and the level of specification) :

- power steering + alternator
- air conditioning + power steering + alternator

13 - 1 - POWER STEERING + ALTERNATOR

(73) Crankshaft pulley .

(74) Dynamic tensioner roller .

(75) Power steering pump .

(76) Alternator .

(77) Stabiliser roller .

(78) Roller tensioner (The belt fitting tension is adjusted by means of a cam ring) .

13 - 2 - AIR CONDITIONING + POWER STEERING + ALTERNATOR

(79) Crankshaft pulley .

(80) Dynamic tensioner roller .

(81) Power steering pump .

(82) Alternator .

(83) Air conditioning compressor .

(84) Roller tensioner (The belt fitting tension is adjusted by means of a cam ring) .