Nissan MR18DE Engine Factory Workshop Manual

The MR18DE Engine Repair and Maintenance Manual provides detailed guidance for the repair, servicing, and maintenance of the Nissan MR18DE engine. Covering all essential procedures, this manual includes step-by-step instructions, diagrams, and specifications to assist both professional mechanics and DIY enthusiasts in ensuring optimal engine performance and longevity

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• Exact volume: 1797 cm³
• Engine features: EGR, NDIS
• Timing drive: chain
• Turbocharging: no
• What oil to pour: 4.5 liters 5W-30
• Engine power: 122 - 128 hp
• Compression ratio: 9.9 - 10
• MR18DE fuel consumption: 6.5-10.1
• What cars was MR18DE installed on: Versa, Tiida, Livina, Wingroad, Cube, AD 4

Timing Chain Stretching

Problem: Over time, the timing chain can stretch, causing noise, rough running, misfiring, and in extreme cases, damaged valves.

Prevention: Monitor noises and vibrations coming from the front of the engine. At the first sign of a timing chain stretching (noise, crankshaft position sensor errors), replace the chain and associated components.

Head Gasket (Cylinder Head) Wear

Problem: The head gasket can wear out, causing coolant or oil leaks and engine overheating.

Prevention: Monitor coolant and oil levels and look for signs of leaks around the engine. If leaks, overheating, or oil and coolant mixing are detected, replace the head gasket.

Clogged Injectors

Problem: Clogged fuel injectors can cause rough running, loss of power, and poor fuel economy.

Prevention: Use quality fuel and regularly add fuel injector cleaner to the tank. If the problem still occurs, clean or replace the injectors.

Cooling System Problems

Problem: Problems with the radiator, thermostat, or water pump can cause the engine to overheat.

Prevention: Check the cooling system regularly, replace the coolant every 2-3 years, monitor the operation of the thermostat and the condition of the radiator. If you find leaks or signs of overheating, take action immediately.

Valve and Piston Deposits

Problem: Over time, carbon deposits can build up on the valves and pistons, causing a loss of compression and engine power.

Prevention: Regularly clean the intake system and use additives to clean deposits. In case of severe deposits, mechanical cleaning or engine decarbonization may be required.

Oil and Filter Changes

Use the recommended oil and change it every 5,000-7,000 km or as recommended by the manufacturer. Replace the oil and air filters regularly.

Fluid Level and Condition Monitoring

Monitor the oil, coolant, brake fluid, and power steering fluid levels. Top up or replace fluids as needed.

Spark Plug Checks

Check and replace spark plugs regularly every 30,000-40,000 km. Faulty spark plugs can cause misfires and reduce engine efficiency.

Fuel Injection System Maintenance

Use injector and intake system cleaners periodically to prevent clogging and deposits. This will help keep the engine running properly.

Visual Inspection

Conduct regular visual inspections of the engine for leaks, damage, or worn components. Early detection helps prevent more serious problems.