which blocks are most prone to failure?

Diesel engines from French manufacturers have long been criticized for their reliability. Although improvements have been made over the years, there are still some models to avoid. Here are the problem engines and those to watch closely.

French manufacturers have long struggled to combine robustness and commercial success for their diesel engines, especially during the 2000swhich were particularly difficult for HDi and dCi. Although they have overcome these issues, it is crucial to know the key periods of their improvement. This will help you avoid choosing a model that may experience problems. costly breakdowns.

Engines never made reliable:

Pour Peugeot/Citroen : The engine 1.4 de 92 chavailable only on the first version of the C3, suffered from injector problems until the end of its production in 2005. The engine 2.2 de 130 chmore greedy, is still subject to chain and timing belt breaks.

For Renault : The 1.9 120 hp enginewithdrawn from the market at the end of 2005, was marked by recurring failures of the variable geometry turbo throughout his career. The 2.2 and 3.0 V6 180 hp enginesused in particular in the Laguna 2, Vel Satis and Espace, but of Isuzu origin for the V6, are known for block breakages, turbo failures, defective injectors and EGR valve problems. Absolutely avoid!

Diesel engines: blocks to avoid

For Peugeot/Citroën:

– 4 HDI 70 ch : This engine suffered from turbo and injector problems in its early years, but was improved in 2011.
– 6 HDi 90/92 ch : The first models experienced turbo failures, resolved in 2014.
– 6 HDI 110/112/115 ch : Frequent turbo, flywheel and clutch problems were corrected with a new version in 2011.
– 2 HDI 170/173 ch : Turbo issues (solenoid valve, connecting rod, etc.) have been resolved on engines manufactured from 2008.
– V6 2.7 HDI 204 ch: Also used by Land Rover and Jaguar, this engine had EGR valve and alternator problems, corrected in 2008.

For Renault/Nissan/Dacia:

– 5 dCi 60/65/70/75/80/85/90/100/105/110 ch : The injection pumps, which were falling apart and causing engine failure, were problematic. The 60, 80 and 90 hp versions before 2006 also had a fragile crankshaft. The Nissan Qashqai experienced broken connecting rods on the 1.5 dCi 106 hp and some 2.0 150 hp until 2008, as well as engine breakages until 2010 (pulleys and timing belt).
– 2.0 dCi : The models produced in the first year (Laguna III only) had injector problems, resolved in 2009.