Nissan Murano Z51 Engine Repair Manual

This manual is designed for owners and repair professionals, offering detailed instructions for servicing, diagnosing and repairing the VQ35DE engine installed in the Nissan Murano Z51. It covers the main components and systems of the engine, methods for diagnosing faults, step-by-step disassembly and assembly procedures, and recommendations for eliminating common problems. Contains diagrams, specifications and advice on the selection of tools and consumables, which helps ensure efficient and reliable engine servicing.

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The VQ35DE engine found in many Nissan models, including the Murano Z51, is reliable and durable, but it does have a few known weaknesses and common problems:

Common Problems and Weaknesses:

Timing Chain Wear: Over time, the timing chain can stretch, causing noise, cam timing issues, and even engine starting issues. This is one of the most common problems with the VQ35DE, especially on higher mileage models.

Valve Cover Gasket Issues: The valve cover gaskets can become loose over time, causing oil to leak into the spark plug wells. This can cause ignition problems and potentially foul the ignition coils.

Front and Rear Crankshaft Oil Seals: These seals can begin to leak oil, causing leaks. If left untreated, this can lead to loss of oil levels and more serious engine damage.

Throttle Issues: The electronic throttle control unit can fail, causing the engine to run rough, lose power, or go into limp mode.

Carbon deposits on intake valves: Over time, carbon deposits can form on intake valves, which can lead to poor performance, unstable engine operation, and increased fuel consumption. This is especially true for direct injection engines.

Catalyst wear: Over time, catalytic converters can deteriorate and particles can enter the cylinders, causing serious engine damage. This is especially true for vehicles with high mileage and poor fuel quality.

Cooling system issues: Some owners report cases of water pump or radiator failure, which can lead to engine overheating.