2663a g8t special features

The repair methods given by the manufacturer in this document are based on thetechnical specifications current when it was prepared.

The methods may be modified as a result of changes by the manufacturer in theproduction of the various component units and accessories from which his vehiclesare constructed".

Renault 1997

ESPACE

2663AService 0422

SAFRANELAGUNA

S/SectionType

TECHNICAL NOTEEdition Anglaise

MAY 199777 11 194 011

10

• Engine : G8T

• Gearbox : XXX

X56 9

Basic manual : Mot. G (D)

10

All copyrights reserved by Renault.

Copying or translating, in part or in full, of this document or use of the service partreference numbering system is forbidden without the prior written authority ofRENAULT.

C

B54 G 10

XE0 E/J 10

SPECIAL FEATURES OF THE G8T TURBO ENGINES

This technical note contains the new class of pistons and conrods for the G8T Turbo engines as well as the heights of the crank pins relating to them.

ENGINE AND LOWER ENGINE ASSEMBLYIdentification 10

Engine Suffix VehicleCompression

RatioBore(mm)

Stroke(mm)

CubicCapacity

(cm3)

G8T

716718740760

XE0EXE0JB54GX569

22/1 87 92 2188

Specifications

PISTONS MAIN BEARING SHELLS

* Piston diametermarking ∅

Bore diameter ∅ (mm)

187to

< 87.015

287.015

to87.030

A from 149.88 to < 149.89

B from 149.89 to < 149.90

C from 149.90 to < 149.91

D from 149.91 to 149.92

4 classes of rod dimension between conrod bigand small ends *

(mm)

* The marking on the rotating assembly on theoriginal engine is reserved exclusively for theuse of the factory where the engine was fitted.

The Parts Department only supplies the followingclasses :- class C conrods,- piston class (height) E - J - L,- piston class (∅) 2

* Marking on piston Piston height (mm)

E44.74

to< 44.78

F44.78

to< 44.82

J44.82

to< 44.86

K44.86

to< 44.90

L44.90

to< 44.94

M44.94

to44.98

10-2

ENGINE AND LOWER ENGINE ASSEMBLYEngine repair 10

REPLACING THE CONRODS OR THE PISTONS

The measurement for the height of the crank pin is carried out as per the method described on page 10-44 ofengine manual Mot. G.

The piston corresponding to the height of the crank pin is defined in the table below, in relation to theconrods fitted originally or in relation to the conrods supplied by the Parts Department.

Conrod Class A

Crank pinheight (mm)

Pistonclass

Conrod Class B


Pistonclass

Conrod Class C


Pistonclass

Conrod Class D


Pistonclass

169.924to

< 169.984E

169.924to

< 169.984E

169.924to

< 169.994E

169.924to

< 170.004E

169.984to

< 170.054J

169.984to

< 170.064J

169.994to

< 170.074J

170.004to

< 170.084J

170.054to

170.150L

170.064to

170.150L

170.074to

170.150L

170.084to

170.150L

NOTE : Calculation of the height of the crank pin must also be carried out if the cylinder block or the cranks-haft is being replaced.

10-3

ENGINE AND LOWER ENGINE ASSEMBLYEngine repair 10

PISTON-CONROD ASSEMBLY

To assemble the piston and the conrod it is essential to respect the direction of the notches (A) which must belocated on the third lobe side of the piston.

Hole (B) on the conrod is offset in relation to the atmospheric versions of the G8T engine.

12314R

10-4

2663a g8t special features

Documents