Engine Renault F8Q

The 1.9-liter Renault F8Q diesel engine was assembled at the company’s plant from 1988 to 2006 and installed on cars such as Kangoo, Clio, Megan, Scenic, as well as Mitsubishi Carisma and Volvo S40. There was an atmospheric version of the engine with 64 hp and a turbocharged version with 90 hp.

F-series diesels also include: F8M, F9Q and F9Qt.

In 1988, a new atmospheric diesel engine with a volume of 1.9 liters debuted on the Renault 19 model, which in fact was a modernization of the 1.6-liter F8M prechamber engine. Thanks to the increased displacement, the power of the updated engine has increased from 54 to 64 hp, although the Kangoo model has a version of the 1.9-liter engine derated to 54 hp. Otherwise, everything remained unchanged here: a cast-iron block with an aluminum 8-valve cylinder head without hydraulic lifters, a timing belt drive and a mechanical injection pump from Bosch, Lucas or Delphi.

A year later, a supercharged version of the diesel engine with a Garrett GT1544S turbine with a power of 90 hp appeared. In the 90s of the last century, this unit was installed on a number of popular models of the concern. The motor was constantly upgraded, over time, a more modern turbine and electronically controlled injection pump appeared here. F8Q engines were installed on Dacia cars until 2006.

The engine was installed on:

  • Renault 19 (X53) in 1988 – 1995;
  • Renault 21 (L48) in 1989 – 1993;
  • Renault Clio 1 (X57) in 1991 – 1998; Clio 2 (X65) in 1998 – 2001;
  • Renault Express 1 (X40) in 1994 – 1998;
  • Renault Kangoo 1 (KC) in 1997 – 2003;
  • Renault Megane 1 (X64) in 1996 – 2000;
  • Renault Scenic 1 (J64) in 1996 – 2000;
  • Renault Trafic 1 (TXW) in 1997 – 2001;
  • Dacia Solenza 1 (B41) in 2003 – 2005; Pick-Up 1 (X41) in 2002 – 2006;
  • Mitsubishi Carisma 1 (DA) in 1996 – 2000;
  • Volvo 440 in 1993 – 1996; 460 in 1993 – 1996; S40 I (644) in 1995 – 1999; V40 I (645) in 1995 – 1999 (as D19T204 or D4192T).

Specifications

Production years 1988-2006
Displacement, cc 1870
Fuel system prechambers
Power output, hp 54 – 64 (atmospheric)
90 (turbocharged)
Torque output, Nm 118 – 120 (atmospheric)
175 – 180 (turbocharged)
Cylinder block cast iron R4
Block head aluminum 8v
Cylinder bore, mm 80
Piston stroke, mm 93
Compression ratio 21.5 (atmospheric)
20.5 (turbocharged)
Hydraulic lifters no
Timing drive belt
Recommended engine oil 5W-40, 10W-40
Engine oil capacity, liter 5.9
Fuel type diesel
Euro standards EURO 1/2
Fuel consumption, L/100 km (for Renault Kangoo 1997)
— city
— highway
— combined
8.2
6.0
6.8
Engine lifespan, km ~500 000
Weight, kg 163

Disadvantages of the Renault F8Q engine

  • The most well-known problem with this diesel engine is head cracking. Almost all motors suffer from cracks and frequent overheating only accelerates their appearance.
  • Most modifications of this engine were equipped with a Lucas fuel pump. He has a lot of problems, and the most common is a leak in the injection advance valve.
  • The whole life of the owner of a car with such a diesel engine passes in the fight against air leaks. It is constantly necessary to check the integrity of all pipes and the fuel filter housing.
  • Something is constantly leaking in this engine. Grease usually oozes from under the valve cover and heat exchanger, and antifreeze from the thermostat housing. Also often the turbine drives oil.
  • Many problems here are caused by capricious sensors and, in particular, their weak wiring, the EGR valve is often clogged or the flow-through fuel heater fails.

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