Altima 2.5 SL L4-2.5L (QR25DE) (2002)
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Removal Tips
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Installation Tips
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Torque Specifications
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Special Tools
Precautions
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Use suitable covers to protect exterior (fenders, grille, etc.) and interior (upholstery, carpet, etc.) when performing this procedure.
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Make sure the parking brake is applied and the front and rear wheels are blocked to prevent vehicle movement.
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Do NOT start work until the cooling and exhaust systems are cooled off.
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Make sure the correct vehicle lift points are used when raising the vehicle. Also, make sure the vehicle is properly positioned (balanced) on the lift,
considering that the engine will be removed.
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Use a torque wrench when installing nuts and bolts.
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Refer to the Torque Charts on pages 44 through 48 and the applicable Service Manual for Torque Specifications when re-installing and tightening
nuts and bolts.
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Cover openings of any vehicle/engine systems that are disconnected/opened to keep out "foreign" materials from getting in.
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Carefully mark and arrange disassembled parts in an organized way for proper re-installation.
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Use care during disassembly/re-assembly NOT to damage sliding or "mating" surfaces.
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Make sure all sliding and mating surfaces are clean and free of debris before reassembly.
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Make sure the new engine has the alignment dowels installed in the rear of the block. There should be two of them (located diagonal to each other).
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Use special tools as needed. Refer to the Special Tools List.
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Always work safely and avoid using too much force.
Removal Tips
Variable Valve Timing (VVT) Wire Harness Connector (Altima and Sentra)
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Make sure the VVT Wire Harness Connector is disconnected before removing the engine (see Figure H1).
