Engine 2.5L QR25DE Workshop Manual

Nissan 2004 2.5L QR25DE Repair Manual. This is a manual on the engine mechanics of this Nissan model. Contains instructions and data on repair procedures. Includes exploded views of engine components, engine block, and cylinder head.

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2.5L QR25DE. The Nissan QR25DE engine is a 2488cc 4-cylinder engine driven by a timing chain drive. Your order of starting this engine; 1-3-4-2. The QR25DE engine produces 121 kW (162 hp). This engine features cast steel connecting rods, a steel timing chain, counter-rotating balance shafts and an aluminum intake manifold. Unlike the QR25DE models released from 2007 onwards which include upgrade options such as; Larger diameter and simpler intake manifold, Balancing system, Strengthened camshaft and connecting rods, improved mounting, improved power and increased rpm.

• Vehicle X-Trail, Altima, Sentra, Rogue, Frontier. Caravan 4 (E25), Presage 1 (U30), Sentra 5 (B15), Teana 2 (J32), Koleos 1 (HY)
• Engine type L4
• Engine code QR25DE
• Oil volume 5.1L

FUEL CONSUMPTION ICE QR25DE

Using the example of a 2005 Nissan X-Trail with a manual transmission:

• City 12.6 liters
• Route 7.6 liters
• Mixed 9.4 liters

The mechanical manuals of the Nissan group show all the data on adjustment and repair of engines belonging to this group. In some cases, the manual provides diagnostic assistance using a troubleshooting chart.

This diagnostic table is compiled based on the symptoms that can be found in a car engine. The Troubleshooting Chart walks an auto mechanic through the inspection process of each stepper motor system, providing the data and specifications that must be followed to resolve a motor's mechanical problem.

BUCKLES IN THE ICE OF THE FIRST YEARS

Before production in 2004, engines were equipped with catalysts that were not very durable, which were destroyed quite quickly, and their crumbs were sucked into the combustion chambers of the internal combustion engine. Also, engines until 2006 had an intake manifold with turbulator flaps, the bolts of which were unscrewed and got into the cylinders with similar consequences.

TIMING CHAIN STRETCH

The thin lamellar Morse chain also does not have the highest service life; it can stretch critically and begin to make a lot of noise already after 150 thousand kilometers. It is often recommended to replace the phase regulator with a chain, but you can simply wash it.

Cylinder head gasket failure

Another common problem here is the regular breakdown of the cylinder head gasket. The culprit is usually faulty thermostats or dirty radiators. In this case, deformation of the head and sometimes the appearance of microcracks often occur.