Nissan Renault R9M (1.6 dCi) Engine

Over the past decade, Nissan and Renault have revolutionized diesel engine technology with the creation of the 1.6-liter R9M or 1.6 dCi. Since its debut in 2011, this engine has been used in a variety of popular models, including the Megane, Scenic, Espace, Koleos and Qashqai and X-trail. For Mercedes cars, this renowned engine is also available under its own indices OM622 and OM626 as an auto part replacement.

The R series of diesel engines continues to evolve with innovations such as the powerful R9N model, designed for improved performance and efficient fuel consumption. Ultimately, this highly successful series of engines evidences just how much automobile manufacturers have been able to achieve in terms of modern engineering advancements.

Nissan – Renault R9M 1.6 dCi Engine specifications

Single-Turbo or 1.6 dCi 130

Twin-Turbo or 1.6 dCi 160

Single-Turbo minibus version

Twin-Turbo minibus version

The dry weight of the R9M engine is 177 kg

Information of the structure of the R9M 1.6 dCi engine

In 2011, another diesel engine jointly developed by Renault-Nissan engineers was presented. This is a 1.6 liter unit with a cast iron block, 16-valve head with hydro-compensators, timing chain drive and Common Rail fuel system from Bosch with piezo nozzles. This engine also received a Start-Stop system and variable capacity oil pump. In addition to the single-turbo 130 hp version, the Twin-Turbo 160 hp version is also available.

The R9M engine number is located on the joint between the block and the head

In 2014, modified versions of this engine for commercial vehicles were presented: 95-115 hp variants with a single turbocharger and 125-145 hp twin-turbo versions. They are still installed on Renault Trafic, Nissan NV300, Mercedes Vito vans, unlike diesel engine for civilian models, which has already given way to a new R9N engine.

R9M Engine

Fuel consumption

The Renault Scenic 1.6 dCi 2014 with manual transmission as an example (l/100km):

What cars have the Renault / Nissan R9M

R9M diesel engine its pros and cons

Advantages:

• High power for this volume
• And fairly modest fuel consumption
• Excellent durability with proper maintenance
• Available on Renault, Nissan and Mercedes

Disadvantages:

• Not common in our market
• Timing chain stretching already at 150 000 km
• The exhaust valve gets dirty very quickly
• Frequent lubricant leaks

Maintenance of the R9M 1.6 dCi engine

Problems & disadvantages of the двигателя R9M

• The most common service calls are related to the piezo injectors, quick contamination of the EGR valves and particulate filter.
• Cranked liners have been reported on foreign forums from 150,000 km for the engine with two turbines rated at 160 hp.
• Timing chain is designed to last throughout the service life of the engine but there have been reports of stretching up to 150,000 km.
• On some models of Renault, heat exchanger in EGR system often fails leading to exhaust gases leaking into passenger compartment.
• There was a recall campaign to replace exhaust pipe on EGR valve due to it sometimes bursting.
• Common oil leaks include those from under timing chain cover and oil filter housing.
• Manufacturer says engine life is 250,000 km but can easily go up to 400,000 km.