Page 59 of 208
TOP AND FRONT OF ENGINE
Cylinder head gasket
11
Remove :
- the exhaust downpipe,
- the hoses and connectors of the cylinder head
coolant pipe housing outlet,
- the connection at (1) using tool Mot. 1311-06,
13097R
99461R
- the air filter assembly by disconnecting the
EGR solenoid valve and the air temperature
sensor (unclip the fuel supply pipes from the
air filter housing),
- the air inlet pipe
- the accelerator cable
- the feeds for the heater plugs ,
- the connector of the injector with sensor,
along with the fast idle solenoid valve connec-
tor (5),
- the fuel supply and return unions at (A) and
(B).
Disconnect connector (6) from the diesel fuel fil-
ter, remove it from its support and move the die-
sel fuel filter pipe assembly to one side. Place bracket Mot. 1159 at the mounting of the
coolant pipe on the cylinder block, then remove
the engine support tool.
99310R
F8Q Engine
11-24
Page 61 of 208
TOP AND FRONT OF ENGINE
Cylinder head gasket
11
11733R
Remove the fuel pipe support (7).
Slacken the mounting bolts for the lower timing
cover, without removing them.
99173-1R
13093R
Remove :
- the accessories belt tensioning system,
- the cylinder head bolts.
Release the cylinder head by setting aside the
lower part of the lower camshaft housing,
without causing the cylinder head to pivot, since
this is centred by the two dowels at ( C ).
Using a syringe, extract any oil which may have
entered the cylinder head mounting holes .
This is necessary in order to obtain the correct
tightening of the bolts.
Protect the oil outlet duct in order to prevent any
foreign bodies from entering the oilways in the
cylinder head.
Failure to take this advice could lead to the
blocking of the oilways, resulting in a rapid dete-
rioration of the camshaft. F8Q Engine
11-26
Page 66 of 208
FUEL MIXTURE
Specifications
12
Vehicle GearboxEngine
Type SuffixBore
(mm)Stroke
(mm)Capacity
(cm
3)RatioCatalytic
converterDepollut-
ion
standard
XC0A JB1 D7F 710 69 76.8 1149 9.65/1 C61 EU 96
Temperature in °C (± 1°) 0 20 40 80 90
Air temperature sensor
Type CTN
Resistance in Ohms5000 to 7000 1700 to 3300 800 to 1550 - -
Coolant temperature sensor
Type CTN
Resistance in Ohms6700 to 8000 2600 to 3000 1100 to 1300 270 to 300 200 to 215
Engine
Type SuffixTests at idle speed*
Engine
speed
[rpm]Pollutant emission **
CO (%) (1) CO
2 (%) HC (ppm) Lambda (λ)Fuel***
[minimum octane
rating]
D7F 710 740±50 0.5 max 14.5 min 100 max 0.97<λ<1.03 Unleaded (OR 95)
(1) at 2500 rpm, CO must be a maximum of 0.3
* For a coolant temperature above 80°C and after stable speed of 2500 rpm, for about 30 seconds. Test to
be carried out after return to idle speed.
** For legal values refer to your country specification.
*** OR 91 unleaded compatible.D7F engine
12-1
Page 67 of 208
FUEL MIXTURE
Specifications
12
DESCRIPTIONMAKE/TYPESPECIAL NOTES
Computer SAGEM or
MAGNÉTI MARÉLLI
35 tracks on manual gearbox vehicles without option
55 tracks on air conditioning vehicles
Injection - Multipoint with semi-sequential regulation
Ignition
-Static with 2 dual output
monobloc coils
Power module integral
in computer
One pinking sensor
tightening torque : 2.5 daN.m
TDC sensor - Resistance 220 Ω
Plugs
EYQUEM : RFC50LZ2E
NGK : BKR5EKGap: 0.9 mm
Tightening torque: 2.5 to 3 daN.m
Fuel filter - Mounted under vehicle in front of fuel tank
Replaced during major service
Fuel pump
WALBROSubmerged in fuel tank
Flow: at least 80 litres/hour at a regulated pressure
of 3 bars and a voltage of 12 V
Pressure regulator
-Regulated pressure
Zero vacuum :3 ± 0.2 bars
Vacuum of 500 mbars :2.5 ± 0.2 bars
Solenoid injectors
SIEMENSVoltage:12 Volts
Resistance :14.5 ± 1 Ω
Tracks Resistance
1 - 2 1.5 Ω
1
- 4 |1 - 3
2 -3 | 2 - 41 Ω
3 - 4 0.6 Ω
HT - HT8 KΩ
D7F engine
12-2
Page 68 of 208
FUEL MIXTURE
Specifications
12
DESCRIPTIONMAKE/TYPESPECIAL NOTES
Throttle bodyMAGNETI MARELLI
873 633diameter 36 mm
Idle speed regulation stepping
motor
AIR PAXVoltage: 12 V (at high frequency)
Resistance : tracks A-D100 ± 10 Ω
tracks B-C100 ± 10 Ω
Throttle position
potentiometer
-Voltage: 5 V
Resistance :
Fuel vapour rebreathing
canister
Solenoid valve-Voltage:12 Volts
Resistance :35 ± 5 Ω
Heated oxygen sensor BOSCH Voltage at 850 °C
Rich mixture > 625 mvolts
Lean mixture : 0 to 80 mvolts
Heating resistance, tracks A-B : 3 to 15 Ω
Tightening torque : 5 daN.m
Diagnostic function
FICHE n° 27
CODE D13
SELECTOR S8
Throttle potentiometer:
Regulated idle speed :10 ≤ # 17 ≤50
Full load :185 ≤ # 17 ≤240
Idle speed R.C.O. :4 % ≤ # 12 ≤14 %
Adaptive idle speed R.C.O. :- 4.3 % ≤ # 21 ≤+3.9 %
Adaptive richness operation
:106 ≤ # 30 ≤150
Adaptive idle speed richness :106 ≤ # 31 ≤150
Track No load Full load
AB
AC
BC1300 Ω
1360 Ω
2300 Ω1300 Ω
2350 Ω
1260 Ω
D7F engine
12-3
Page 69 of 208
FUEL MIXTURE
Specifications
12
Vehicle GearboxEngine
Type SuffixBore
(mm)Stroke
(mm)Capacity
(cm
3)RatioCatalytic
converterDepollu-
tion
standard
XC0C Manual E7J 780 75.8 77 1390 9.5/1 C63 EU 96
Temperature in °C (± 1°) 0 20 40 80 90
Air temperature sensor
Type CTN
Resistance in Ohms7470 to
119703060 to 4045 1315 to 1600 - -
Coolant temperature sensor
Type CTN
Resistance in Ohms6700 to 8000 2600 to 3000 1100 to 1300 270 to 300 200 to 215
Engine
Type SuffixTests at idle speed*
Engine
speed
[rpm]Pollutant emission **
CO (%) (1) CO
2 (%) HC (ppm) Lambda (λ)Fuel***
(minimum octane
rating)
E7J 780 750±50 0.5 max 14.5 min 100 max 0.97<λ<1.03 Unleaded (OR 95)
(1) at 2500 rpm, CO must be a maximum of 0.3
* For a coolant temperature above 80°C and after stable speed of 2500 rpm, for about 30 seconds. Test to
be carried out after return to idle speed.
** For legal values refer to your country specification.
*** OR 91 unleaded compatible.E7J engine
12-4
Page 70 of 208
FUEL MIXTURE
Specifications
12
DESCRIPTIONMAKE/TYPESPECIAL NOTES
ComputerSIEMENS
FENIX 555tracks
Injection - Multipoint with semi-sequential regulation
Ignition
-Static with 2 dual output
monobloc coils
Power module integral
in computer
One pinking sensor
tightening torque : 2.5 daN.m
TDC sensor - Resistance 220 Ω
Plugs
EYQUEM : RFC52LS
CHAMPION
: RC10PYC
Gap: 0.9 mm
Tightening torque: 2.5 to 3 daN.m
Fuel filter - Mounted under vehicle in front of fuel tank
Replaced during major service
Fuel pump
WALBROSubmerged in fuel tank
Flow: at least 80 litres/hour at a regulated pressure
of 3 bars and a voltage of 12 V
Pressure regulator
-
Regulated pressure
Zero vacuum :3 ± 0.2 bars
Vacuum of 500 mbars :2.5 ± 0.2 bars
Solenoid injectors
SIEMENSVoltage:12 Volts
Resistance :14.5 ± 1 Ω
Tracks Resistance
1 - 2 0.5 Ω
1 - 3
2 -31 Ω
HT - HT10 KΩ
E7J engine
12-5
Page 71 of 208
FUEL MIXTURE
Specifications
12
DESCRIPTIONMAKE/TYPESPECIAL NOTES
Throttle bodyPIERBURG
714 227diameter 41 mm
Idle speed regulation stepping
motor- Voltage: 12 V (at high frequency)
Resistance : tracks A-D52 ± 5 Ω
tracks B-C52 ± 5 Ω
Throttle position
potentiometer
-Voltage: 5 V
Resistance :
Fuel vapour rebreathing
canister
Solenoid valve
DELCO REMYVoltage:12 Volts
Resistance :35 ± 5 Ω
Heated oxygen sensor NGK Voltage at 850 °C
Rich mixture > 625 mvolts
Lean mixture : 0 to 80 mvolts
Heating resistance, tracks A-B : 3 to 15 Ω
Tightening torque : 4.5 daN.m
Diagnostic function
FICHE n° 27
CODE D13
SELECTOR S8
Throttle potentiometer:
Regulated idle speed :16 ≤ # 17 ≤50
Full load :185 ≤ # 17 ≤243
Idle speed R.C.O. :2 % ≤ # 12 ≤15 %
Adaptive idle speed R.C.O. :- 2.4% ≤ # 21 ≤+6.2 %
Adaptive richness operation
:64 ≤ # 30 ≤192
Adaptive idle speed richness :64 ≤ # 31 ≤192
Track no load full load
1-2
1-3
2-35440 Ω
4500 Ω
2160 Ω2200 Ω
4460 Ω
5340 Ω
E7J engine
12-6