2000 Citroen C5 engine

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54
ENGINE SPECIFICATION
Engines : RHY - RHZ - 4HX
Engine identification
Engine : 4HX Engines : RHY-RHZ
References
Compulsory engine plate :
"a"Engine legislative type.
"b" Component reference.
"c"Factory serial no.
B1CP046DB1CP07YD

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55
CYLINDER HEAD
Engines : RHZ - RHY
Cylinder head gasket identification
Number
of notches at A Thickness
(mm) Engine
platePiston
stand-proud
(mm)
0.47 to 0.605 1.30 ± 0.06 1
0.605 to 0.655 1.35 ± 0.06 2
0.655 to 0.705 1.40 ± 0.06 3
0.705 to 0.755 1.45 ± 0.06 4
0.755 to 0.83 1.50 ± 0.06 5
RHZ
RHY
B1DP15AD
Cylinder head.
- New cylinder head height = 133 mm.
- Maximum permitted deformation = 0.03 mm.
Cylinder head gasket.
Multilayer cylinder head gasket.
Select seal thickness as a function of the piston stand-proud.
Hydraulic followers.
The hydraulic followers have automatic clearance adjustment.

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56
Engines : RHY - RHZ
Cylinder head gasket identification
X = MAXIMUM reusable length NOTE : Grease the bolts on the threads and under the heads,
(using engine oil or Molykote G plus). ESSENTIAL
:
Tighten screw by screw in the
order indicated.
Pre-tightening2 ± 0.2
Tightening6 ± 0.6
Angular tightening220° ± 5°
(Order from 1 to 10)
B1DP05BC
RHY - RHZ
X = 133.3 mm Cylinder head tightening (m.daN) Cylinder head bolts
CYLINDER HEAD
B1DP15ECB1DP13PC

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57
CYLINDER HEAD
Engine : 4HX
Cylinder head gasket identification
Number
of notches
At B At A Thickness
(mm) Engine
platePiston
stand-proud (mm)
0.55 to 0.60 1.25 ± 0.04 1
0.61 to 0.65 1.30 ± 0.04
12
0.66 to 0.70 1.35 ± 0.04 3
0.71 to 0.75 1.40 ± 0.04 4
4HX
Cylinder head.
- New cylinder head height = 133 mm.
- Maximum permitted deformation = 0,03 mm.
Cylinder head gasket.
Multilayer cylinder head gasket.
Select seal thickness as a function of the piston stand-proud.
Hydraulic followers.
The hydraulic followers have automatic clearance adjustment.
B1DP18XD

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58
Engine : 4HX
Cylinder head gasket identification
X = MAXIMUM reusable length NOTE : Grease the bolts on the threads and under the heads,
(using engine oil or Molykote G plus. ESSENTIAL : Tighten screw by screw
and in the order indicated.
Pre-tightening2 ± 0.2(Order 1 to 10)
Tightening6 ± 0.6(Order 1 to 10)
Untightening360°(Order 10 to 1)
Pre-tightening2 ± 0.2(Order 1 to 10)
Tightening6 ± 0.6(Order 1 to 10)
Angular tightening220°±5°(Order 1 to 10)
(In 2 attempts max.)
B1DP05BC
4HX
X = 134.5 mm Cylinder head tightening (m.daN)
4HXCylinder head bolts
CYLINDER HEAD (Continued)
B1DP15EC

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59 Tooling
BELT TENSION/SEEM UNITS CORRESPONDENCE TABLE
!4099-T (C.TRONIC.105)4122-T (C.TRONIC.105.5) !!!
B1EP135D

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60
AUXILIARY EQUIPMENT DRIVE BELT
Engines : all types Petrol and Diesel
TOOLS
Belt tension measuring instrument : 4122 - T
(C.TRONIC 105.5)
WARNING : If using tool 4099-T (C.TRONIC 105), refer to the correspondence table on page 59.
ESSENTIAL:
Before refitting the auxiliary equipment drive belt, check that:
1 / The roller(s) rotate freely(no play or stiffness).
2 /The belt is correctly engaged in the grooves of the various pulleys.

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61
AUXILIARY EQUIPMENT DRIVE BELT
Engines : 6FZ-RFN-RLZ
Without Aircon
With Aircon
TOOLS
[1] Pliers for removing plastic pegs7504-T
Remove the belt.
- Detension the belt (3)by turning the tensioner roller(1), by the screw(2)
(anti-clockwise).
WARNING:the screw (2) has a left hand thread.
- Remove the belt (3), while keeping the tensioner roller (1)tensioned.
Refit the belt.
- Compress the tensioner roller (1).
- Fit the belt (3).
- Release the tensioner roller (1).
Tightening torques m.daN.
Tensioner roller screw (4) 2 ± 0.2
Guide roller screw (5) 3.5 ± 0.3
B1BP23QC
B1BP23PC
B1BP23RC