Engine Mechanical - 2.5L: Specifications Nissan Altima L31

PARTS REQUIRING ANGULAR TIGHTENING

1. Use an angle wrench for the final tightening of the following engine parts. Cylinder head bolts Lower cylinder block bolts Connecting rod cap bolts Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angular tightening)
2. Do not use a torque valve for final tightening.
3. The torque valve for these parts are for a preliminary step.
4. Ensure thread and seat surfaces are clean and coated with engine oil.

Scheme 1

1. After removing the mounting bolts and nuts, disconnect the component using a seal cutter. CAUTION: Be careful not to damage the mating surfaces.
2. In areas where the cutter is difficult to use, use a plastic hammer to lightly tap the areas where the sealant is applied to disconnect the component. CAUTION: If for some unavoidable reason a tool such as a flat-bladed screwdriver is used, be careful not to damage the mating surfaces.

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1. Using a scraper, remove the old RTV Silicone Sealant adhering to the gasket application surface and the mating surface. Remove the sealant completely from the groove of the gasket application surface, mounting bolts, and bolt holes.
2. Thoroughly clean the gasket application surface and the mating surface and remove adhering moisture, grease and foreign materials.
3. Attach the sealant tube to the tube presser. Use Genuine RTV Silicone Sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS .
4. Apply the sealant without breaks to the specified location with the specified dimensions. If there is a groove for the sealant application, apply the sealant to the groove. As for the bolt holes, normally apply the sealant inside the holes. If specified, it should be applied outside the holes. Make sure to read the text of this article. Within five minutes of the sealant application, install the mating component. If the sealant protrudes, wipe it off immediately. Do not retighten after the installation. After 30 minutes or more have passed from the installation, fill the engine with the specified oil and coolant. Refer to RECOMMENDED FLUIDS AND LUBRICANTS . CAUTION: Follow all specific instructions in this article.

Tightening Intake Manifold Bolts and Nuts

1. Tighten in numerical order as shown.

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Scheme 5

1. Tighten in numerical order as shown. CAUTION: After tightening No. 7 retighten the No. 1 mounting bolt to specification. Installation of Electric Throttle Control Actuator
2. Tighten the mounting bolts of electric throttle control actuator equally and diagonally in several steps. Electric throttle control actuator mounting bolts :7.2 - 9.6 N.m (0.74 - 0.98 kg-m, 64 - 84 in-lb)
3. After installation perform procedure in «INSPECTION AFTER INSTALLATION»(ref-159291-S30667982752005042600000) .

General Specifications

GENERAL SPECIFICATIONS Cylinder arrangement 4 in-line Displacement cm 3 (cu in) 2,488 (151.82) Bore and stroke mm (in) 89.0 x 100 (3.50 - 3.94) Valve arrangement DOHC Firing order 1-3-4-2 Number of piston rings Compression 2 Oil 1 Compression ratio 9.5 Compression pressure kPa (kg/cm 2 ) / 250 rpm Standard 1,250 (12.8) Minimum 1,060 (10.8) Differential limit between cylinders 100 (1.0) Valve timing Unit: degree a b c d e f 224 244 0 64 3 41

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TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

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