2000 Nissan Altima SE Timing Belt Replacement

2000 Nissan Altima SE Timing Belt Replacement

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Removal 1. Release fuel pressure. See FUEL PRESSURE RELEASE. Drain coolant from radiator and cylinder block. Drain engine oil. Disconnect all necessary coolant hoses, electrical connectors, vacuum hoses, fuel lines and control cables. 2. Remove front exhaust pipe. Remove air injection valve pipe. Remove intake air duct. Remove radiator fan and shroud. On Frontier and Xterra, remove exhaust manifold. See EXHAUST MANIFOLD. On all models, remove injectors and fuel rail as an assembly. Remove distributor cap and spark plugs. 3. Set cylinder No. 1 at TDC of compression stroke, ensuring marks on crankshaft pulley and front cover align, and distributor rotor points to spark plug wire No. 1 on cap. Remove cylinder head cover. Remove distributor. 4. Prevent camshafts from turning, and remove camshaft sprocket bolts. Remove camshaft sprocket. Mark and remove camshaft bearing caps in reverse order of installation.

See Fig. 17. Remove camshafts. 5. Loosen cylinder head bolts in 2 or 3 steps, in reverse order of tightening sequence. See Fig. 11. Remove camshaft sprocket cover. Remove outer (upper) chain tensioner and guide. Remove outer timing chain. NOTE: If cylinder head is being removed and lower timing chain is not being replaced, install a chain support tool to prevent lower timing chain tensioner from expanding. See Fig. 13. 6. Remove idler sprocket bolt. Remove cylinder head. Remove oil pan and oil strainer. See OIL PAN. Remove accessory drive belts. Remove A/C compressor idler pulley (if equipped). Remove crankshaft pulley. Remove front cover. Remove chain tensioner, tensioner arm and chain guides. Remove inner (lower) timing chain and idler sprocket. Remove oil pump drive spacer and crankshaft sprocket. Inspection 1. Inspect chain roller links. Replace chain if roller links are cracked or worn. Inspect cylinder head and cylinder block mating surfaces for warpage. If warpage exceeds specification, machine cylinder head. See CYLINDER HEAD table under ENGINE SPECIFICATIONS. 2. If machining reduces cylinder head height to less than specification, replace cylinder head. After machining, rotate camshaft by hand. Replace cylinder head if camshaft does not rotate freely.

Installation 1. Install crankshaft sprocket with sprocket teeth toward front of engine, and shoulder toward rear of engine. Install oil pump drive gear/spacer. Ensure cylinder No. 1 is at TDC, with crankshaft sprocket keyway at 12 o’clock position. See Fig. 14-Fig. 16 . 2. Install inner timing chain onto crankshaft sprocket and idler sprocket. Hold idler sprocket in position. Ensure mating marks on sprockets align with Silver chain links. Install chain guide and tensioner. 3. Apply lithium grease to front cover oil seal. Apply a .08-.12″ (2-3 mm) diameter bead of sealant to front cover. Install front cover. Install crankshaft pulley. Tighten bolt to specification. See TORQUE SPECIFICATIONS. 4. Install oil strainer, oil pan, accessory drive components and belts. Install front engine mount. Install cylinder head and NEW gasket, and temporarily snug cylinder head bolts. Install outer timing chain,