Diesel engine specifications (Renault Clio 1)

Main characteristics

Designation: Non-turbocharged engines - 1.9D models	F8Q 620, F8Q 788*
Turbocharged engines: Indirect injection - 1.9 dT models	F8Q 784, F8Q 786*
Direct injection - 1.9 dTi models	F9Q 730, F9Q 734*
Cylinder bore diameter	80.0 mm
Piston stroke	93.0 mm
Working volume	1870 cm³
Compression ratio: F8Q naturally aspirated engines	21.5: 1
Turbocharged F8Q engines	20.5: 1
F9Q engines	18.3: 1
Cylinder firing order	1-3-4-2 (cylinder #1 on flywheel/drive plate side)
Direction of crankshaft rotation	Clockwise when viewed from the pulley side

* Note: Engines without intermediate shaft.

Compression (engine warm - approximately 80°C)

Normal pressure: F8Q engines	27 bar
F9Q engines	22 bar
Minimum pressure - all engines	20 bar
Maximum difference between cylinders	4 bar

Valve clearances (the engine is cold)

Inlet valve	0.20 mm
Exhaust valve	0.40 mm

Timing belt tension

	Installation/checking	Minimum
F8Q engines with "HTD" toothed belt drive and F9Q engines	38±10% for the SEEM block	36 by SEEM block
F8Q engines with "HTD2" toothed belt drive	47±10% for the SEEM block	36 by SEEM block

Cylinder head

Height: F8Q engines	159.50±0.20 mm
F9Q engines	162.00±0.10 mm
Maximum permissible deformation of the gasket surface	0.05 mm
Vortex Chamber Projection Height - F8Q Engines	0.01 - 0.04 mm
Valve depth relative to cylinder head surface:	Inlet	Outlet
Engines without turbocharging	0.85±0.09 mm	0.97±0.09 mm
Turbocharged engines	0.65±0.09 mm	0.57±0.09 mm
Valve seat angle: F8Q engines	120°	90°
F9Q engines	90°	90°
Valve seat width	1.8 mm
Valve guide inner diameter: F8Q engines	8.0 mm
F9Q engines - rating	7.0 mm + 0.02 mm
Valve guide outer diameter: F8Q Engines: Nominal	13.00 mm
Repair	13.30 mm
F9Q engines: Nominal	12.00 mm +0.03 mm - +0.05 mm
Repair	No data

Camshaft

Axial clearance

0.05 - 0.13 mm

Valves

Head diameter:	Inlet	Outlet
Engines F8Q 620 and F8Q 788: Regular saddle	36.100 mm	31,500 mm
Steel saddle*	36.350 mm	31,500 mm
F8Q 784 and F8Q 786 engines	36.225±0.125 mm	31.620±0.120 mm
F9Q engines	35.200 mm	32,500 mm
Rod diameter: F8Q 620 and F8Q 788 engines	8,000 mm
F8Q 784 and F8Q 786 engines	7.985±0.040 mm
F9Q engines	7.000 mm -0.010 mm - -0.020 mm
Free length of valve spring: F8Q 620 and F8Q 788 engines	43.41 mm
F8Q 784 and F8Q 786 engines	47.57 mm
F9Q engines	45.80 mm

* Cylinder heads with steel valve seats may be identified by ribs on them.

Cylinder block

Cylinder bore diameter: F8Q Engines:* Class A or 1	80,000 - 81,015 mm
Class B or 2	80.015 - 80.030 mm
F9Q engines - rating	80,000 mm

* Note: Cylinder bore size classes are indicated by holes on the side surface of the block, directly below the cylinder head seating surface.

Pistons and piston rings

Piston ring gaps	Pre-installed
Piston ring thickness: Upper compression ring: Engines without turbocharging	2.0 mm
Turbocharged engines	2.5 mm
Second compression ring	2.0 mm
Oil scraper ring	3.0 mm
Clearance between the piston and the cylinder wall	0.015 - 0.030 mm

Connecting rods

Connecting rod bearing working clearance	0.014 - 0.053 mm
Lateral play of the connecting rod cap	0.220 - 0.400 mm

Intermediate shaft

Axial clearance

0.07 - 0.15 mm

Crankshaft

Main bearing journal diameter: F8Q engines: Nominal	54.795±0.01 mm
Repair	54.545±0.01 mm
F9Q engines: Nominal	54.790±0.01 mm
Repair	No data
Main bearing working clearance	0.020 - 0.058 mm
Connecting rod bearing journal diameter: F8Q engines: Nominal	48.00 mm
Repair	47.75 mm +0.02 mm -0.00 mm
F9Q engines: Nominal	48.00 mm +0.02 mm
Repair	No data
Crankshaft axial clearance	0.070 - 0.230 mm
Thrust washer thicknesses	2.30, 2.35, 2.40 and 2.45 mm

Lubrication system

Minimum oil pressure at 80°C: At 1000 rpm	1.2 bar
At 3500 rpm	3.5 bar
Oil pump clearances:	Minimum	Maximum
Between the gear and the housing	0.100 mm	0.240 mm
Axial clearance of gear	0.020 mm	0.085 mm

Tightening torques Nm

Valve cover nuts/bolts	12
Camshaft Bearing Caps: Fasteners with a diameter of 8 mm	20
6mm diameter fasteners	10
Camshaft Sprocket Bolt: F8Q engines	50
F9Q engines	60
Timing belt tensioner nut	50
Intermediate shaft sprocket bolt - F8Q 620, F8Q 784 and F9Q 730 engines	50
Sprocket Bolt - All Other Engines	No data
Fuel pump sprocket nut	See Section 4B
Oil jet mounting bolts	20±2
Flywheel mounting bolts*	50 - 55
Pallet mounting bolts	12-15
Engine oil drain plug	See Section 1
Engine/gearbox mounts	See Chapter 13
Reinforced flywheel bracket/cover: On the engine	50
On the transmission	25
Wheel mounting bolts	See Section 1
Cylinder Head Bolts - F8Q 620, F8Q 788 and all F9Q engines:* Stage 1 - all bolts in the order shown in Illustration 9.51	30
Stage 2	Tighten all bolts 50°±4°
Stage 3	Wait 3 minutes
Stage 4	Loosen bolts 1 and 2 completely
Stage 5	Tighten bolts 1 and 2 to a tightening torque of 25 Nm
Stage 6	Tighten bolts 1 and 2 by 213°±7°
Stage 7	Loosen bolts 3 and 4 completely
Stage 8	Tighten bolts 3 and 4 to a tightening torque of 25 Nm
Stage 9	Tighten bolts 3 and 4 by 213°±7°
Stage 10	Loosen bolts 5 and 6 completely
Stage 11	Tighten bolts 5 and 6 to a tightening torque of 25 Nm
Stage 12	Tighten bolts 5 and 6 by 213°±7°
Stage 13	Loosen bolts 7 and 8 completely
Stage 14	Tighten bolts 7 and 8 to a tightening torque of 25 Nm
Stage 15	Tighten bolts 7 and 8 by 213°±7°
Stage 16	Loosen bolts 9 and 10 completely
Stage 17	Tighten bolts 9 and 10 to a tightening torque of 25 Nm
Stage 18	Tighten bolts 9 and 10 by 213°±7°
Cylinder head bolts - F8Q 784 and F8Q 786 engines: ** Stage 1 - all bolts as shown in the illustration. 9.51 in order	30
Stage 2	Tighten all bolts by 50°±4°
Stage 3	Wait 3 minutes
Stage 4	Loosen bolts 1 and 2 completely
Stage 5	Tighten bolts 1 and 2 to a tightening torque of 25 Nm
Stage 6	Tighten bolts 1 and 2 by 213°±7°
Stage 7	Loosen bolts 3 and 4 completely
Stage 8	Tighten bolts 3 and 4 to a tightening torque of 25 Nm
Stage 9	Tighten bolts 3 and 4 by 213°±7°
Stage 10	Loosen bolts 5 and 6 completely
Stage 11	Tighten bolts 5 and 6 to a tightening torque of 25 Nm
Stage 12	Tighten bolts 5 and 6 by 213°±7°
Stage 13	Loosen bolts 7 and 8 completely
Stage 14	Tighten bolts 7 and 8 to a tightening torque of 25 Nm
Stage 15	Tighten bolts 7 and# 8 by 213°±7°
Stage 16	Loosen bolts 9 and 10 completely
Stage 17	Tighten bolts 9 and 10 to a tightening torque of 25 Nm
Stage 18	Tighten bolts 9 and 10 by 213°±7°
Stage 19	Start the engine and warm it up to normal operating temperature (the fan should turn on) - then turn off the engine
Stage 20	Allow the engine to cool completely
Stage 21	Tighten bolts 1 and 2 further by 120°±7°
Stage 22	Tighten bolts 3 and 4 further by 120°±7°
Stage 23	Tighten bolts 5 and 6 further by 120° + 7°
Stage 24	Tighten bolts 7 and 8 further by 120°±7°
Stage 25	Tighten bolts 9 and 10 further by 120°±7°
Crankshaft pulley bolt: Early engines	90 - 100
Late engines with the "NTS2" drive belt - with a blocking compound on the thread: Stage 1	20
Stage 2	Turn further by 115°
Connecting rod bearing cap bolts	45-50
Main bearing caps	60 - 65
Oil Pump Bolts - F8Q 620, F8Q 784 and F9Q 730 Engines: Bolts with a diameter of 6 mm	10
Bolts with a diameter of 8 mm	22
Oil Pump - All Other Engines: Mounting bolts	No data
Sprocket bolts	No data

* Note: It is not necessary to re-tighten the cylinder head bolts after the engine has been started for the first time.

**Note: Use new bolts.