Main characteristics
Characteristic | Meaning |
Designation: | |
8-valve single overhead cam engines (SOHC) | |
Models with a manual gearbox | F3R 750, F3R 796*, F3R 798* |
Models with automatic transmission | F3R751, F3R 791*, F3R 797* |
16-valve engine with two overhead camshafts (DOHC) | F7R 710 |
Cylinder diameter | 82.7 mm |
piston stroke | 93.0 mm |
Working volume | 19983 |
Compression ratio | 9.8:1 |
The order of operation of the cylinders | 1-3-4-2 (#1 cylinder on the flywheel/drive plate side) |
Direction of rotation of the crankshaft | Clockwise as viewed from pulley side |
Engines without an intermediate shaft. |
Valve clearances (cold)
Characteristic | Meaning |
F3R engines: | |
Inlet valve | 0.20 mm |
F7R engine | Self-adjusting hydraulic pushers |
Timing belt tension value (see text) | |
Instrument readings: | |
F3R engines | 29 ± 10% SEEM |
Minimum value: | |
F3R engines | 27 SEEM |
Cylinder head
Characteristic | Meaning |
Height: | |
F3R engines | 169.50 mm±0.2 mm |
Maximum allowable deformation of the gasket surface | 0.05mm |
Valve seat angle | 90° |
Valve seat width: | |
F3R engines | 1.7±0.2mm |
F7R engines: | |
Inlet valve | 1.4mm |
Camshafts
Characteristic | Meaning |
Axial clearance | 0.048 - 0.133 mm |
Valves
Characteristic | F3R engines | F7R engine |
Inlet valve | 40.0 mm | 33.0 mm |
Exhaust valve | 32.5mm | 28.5mm |
Rod diameter | 8.0 mm | 7.0 mm |
Cylinder block
Characteristic | Meaning |
Diameter: | |
Size group | A 82.70 - 82.71 mm |
Size group | B 82.71 - 82.72 mm |
Size group | C 82.72 - 82.73 mm |
Pistons and piston rings
Characteristic | Meaning |
Piston diameter: | |
F3R engines: | |
Size group A or 1 | 82.665 - 82.675 mm |
Size group B or 2 | 82.675 - 82.685 mm |
Size group B or 2 | 82.675 - 82.685 mm |
F7R engine | |
Size group V or 1 | 82.655 - 82.665 mm |
Size group B or 2 | 82.665 - 82.675 mm |
Size group R or 3 | 82.675 - 82.685 mm |
Piston ring thickness
Characteristic | F3R engines | F7R engine |
Top compression ring | 1.50 mm | 1.20 mm |
Second compression ring | 1.75 mm | 1.50 mm |
Oil scraper ring | 3.00 mm | 2.50 mm |
Clearance between piston and cylinder: | ||
F3R engines | 0.035 - 0.065 mm |
Connecting rods
Characteristic | Meaning |
Connecting rod bearing operating clearance* | 0.025 - 0.050 mm |
Side play of the connecting rod cap | 0.220 — 0.400 |
* The above data are averaged for this type of engine - no exact data has been determined by Renault.
Intermediate shaft
Characteristic | Meaning |
Axial clearance | 0.070 - 0.150 mm |
Crankshaft
Characteristic | Meaning |
Main bearing journal diameter: | |
Nominal | 54.795 mm±0.01 mm |
Operating clearance of the main bearing | 0.020 - 0.058 mm |
Connecting rod journal diameter: | |
Nominal | 48.000 mm |
Axial clearance of the crankshaft | 0.07 0.23 mm |
Lubrication system
Characteristic | Meaning |
Minimum oil pressure at 80°C: | |
1000 rpm | 1.2 bar |
Oil pump clearances
Characteristic | Minimum | Maximum |
Between gear and housing | 0.100 mm | 0.240 mm |
Axial gear clearance | 0.020 mm | 0.085 mm |
Tightening torques, Nm
Characteristic | Meaning |
Valve cover nuts/bolts | 5 |
Camshaft bearing caps - F3R engines: | |
Bolts with a diameter of 8 mm | 20 |
Camshaft housing bolts - F7R engines: | |
Bolts with a diameter of 8 mm | 24 |
Camshaft gear bolt | 50 |
Bolts of an intermediate pulley of a gear driving belt | 20 |
Nut of a pulley of the mechanism of a tension of a driving belt | 50 |
Camshaft gear bolt | 50 |
Bolts of an intermediate pulley of a gear driving belt | 20 |
Nut of a pulley of the mechanism of a tension of a driving belt | 50 |
Countershaft Gear Bolt - F3R 750, F3R 751, F7R 710 Engines | 50 |
Cylinder Head Bolts - F3R Engines:* | |
Stage 1 - all bolts, in the order shown in illustration 10.40a | 30 |
Stage 2 | Tighten all bolts by 50°± 4° |
Stage 3 | Wait 3 minutes |
Stage 4 | Loosen bolts 1 and 2 by 180° |
Stage 5 | Tighten bolts 1 and 2 to 25 Nm |
Stage 6 | Tighten bolts 1 and 2 by 123°± 7° |
Stage 7 | Loosen bolts 3 and 4 by 180° |
Stage 8 | Tighten bolts 3 and 4 to 25 Nm |
Stage 9 | Tighten bolts 3 and 4 by 123°± 7° |
Stage 10 | Loosen bolts 5 and 6 by 180° |
Stage 11 | Tighten bolts 5 and 6 to 25 Nm |
Stage 12 | Tighten bolts 5 and 6 by 123°± 7° |
Stage 13 | Loosen bolts 7 and 8 by 180° |
Stage 14 | Tighten bolts 7 and 8 to 25 Nm |
Stage 15 | Tighten bolts 7 and 8 by 123°± 7° |
Stage 16 | Loosen bolts 9 and 10 by 180° |
Stage 17 | Tighten bolts 9 and 10 by 123°± 7° |
Stage 18 | Tighten bolts 9 and 10 by 123°± 7° |
Cylinder head bolts - F7R* engine: | |
Stage 1 - all bolts, in the order shown in illustration 10.40a | 30 |
Stage 2 | Tighten all bolts by 50°± 2° |
Stage 3 | Wait 3 minutes |
Stage 4 - each bolt in turn, in the reverse order shown in illustration 10.40a | Loosen all bolts completely |
Stage 5 - all bolts, in the order shown in illustration 10.40a | Tighten all bolts to 25 Nm |
Stage 6 | Tighten all bolts by 107°± 2° |
Stage 7 | Start the engine and warm it up to normal operating temperature (when the fan turns on) - turn off the engine |
Stage 8 | Loosen the bolts shown in illustration 10.53 |
Stage 9 | Let the engine cool down completely |
Stage 10 | Loosen bolts 1 and 2 completely |
Stage 11 | Tighten bolts 1 and 2 to 25 Nm |
Stage 12 | Tighten bolts 1 and 2 by 107°± 2° |
Stage 13 | Loosen bolts 3 and 4 completely |
Stage 14 | Tighten bolts 3 and 4 to 25 Nm |
Stage 15 | Tighten bolts 3 and 4 by 107°± 2° |
Stage 16 | Loosen bolts 5 and 6 completely |
Stage 17 | Tighten bolts 5 and 6 to 25 Nm |
Stage 18 | Tighten bolts 5 and 6 by 107°± 2° |
Stage 19 | Loosen bolts 7 and 8 completely |
Stage 20 | Tighten bolts 7 and 8 to 25 Nm |
Stage 21 | Tighten bolts 7 and 8 by 107°± 2° |
Stage 22 | Loosen bolts 9 and 10 completely |
Stage 23 | Tighten bolts 9 and 10 to 25 Nm |
Stage 24 | Tighten bolts 9 and 10 by 107°± 2° |
Stage 25 | Tighten the bolts shown in illustration 10.53 |
crankshaft pulley bolt | 95 |
Connecting rod bearing caps | 50 |
Main bearing caps | 65 |
Oil pump bolts - F3R 750, F3R 751, F7R 710 engines: | |
Bolts with a diameter of 6 mm | 10 |
Oil pump - all other engines: | |
Mounting bolts | No data |
Flywheel/drive plate bolts: | |
F3R engines | 50 — 55 |
Pallet bolts | 13 |
Engine oil drain plug | Contact the Head Maintenance |
Engine/Gearbox Mounts | Refer to Section Description of the compression test |
Bracket-flywheel/drive plate cover: | |
On the engine | 50 |
Inlet pipeline | Contact the Head Power systems, release |
An exhaust manifold | Contact the Head Power systems, release |
Bolts of fastening of a rotary fist to a rack of a forward suspension bracket | Contact the Head Suspension and steering |
Shift rod pinch bolt | Contact the Head Transmission |
LH Drive Shaft Inner Boot Mount Plate Bolts - Manual Transmission Models | Contact the Head Drive shafts |
Wheel bolts | Contact the Head Maintenance |
* Use new bolts. |