1993 Nissan Sentra SE Timing Chain Removal Installation
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1. Release fuel pressure. See FUEL PRESSURE RELEASE. Drain coolant from radiator and cylinder block (drain plug is on left side of block, between flywheel and exhaust manifold). Remove accessory drive belts and power steering pump bracket. Remove intake air duct. Remove right front wheel and splash shield. 2. Remove engine undercovers. Remove front exhaust pipe. Remove front engine mounting bracket. Remove cylinder head cover, distributor cap and spark plugs. Set piston No. 1 at TDC of compression stroke. 3. Remove camshaft sprocket cover and gusset. See Fig. 4 . Remove water pump pulley and thermostat housing. Remove chain tensioner and guide. See Fig. 6 . Loosen idler sprocket bolt. Remove camshaft sprockets. Remove idler sprocket bolt. Remove idler sprocket from rear. Remove outer (upper) timing chain. 4. Remove crossmember and rear engine mount. Remove oil pan and strainer.
1. Release fuel pressure. See FUEL PRESSURE RELEASE. Drain coolant from radiator and cylinder block (drain plug is on left side of block, between flywheel and exhaust manifold). Remove accessory drive belts and power steering pump bracket. Remove intake air duct. Remove right front wheel and splash shield. 2. Remove engine undercovers. Remove front exhaust pipe. Remove front engine mounting bracket. Remove cylinder head cover, distributor cap and spark plugs. Set piston No. 1 at TDC of compression stroke. 3. Remove camshaft sprocket cover and gusset. See Fig. 4 . Remove water pump pulley and thermostat housing. Remove chain tensioner and guide. See Fig. 6 . Loosen idler sprocket bolt. Remove camshaft sprockets. Remove idler sprocket bolt. Remove idler sprocket from rear. Remove outer (upper) timing chain. 4. Remove crossmember and rear engine mount. Remove oil pan and strainer.
Remove crankshaft pulley.
Support engine using a jack. Remove front engine mount. Remove front
cover bolts (one of these bolts retains water pump and front cover).
Remove front cover. Remove idler sprocket, inner (lower) timing chain
and oil pump drive spacer. Remove chain guide and crankshaft sprocket.
Installation 1. Ensure cylinder No. 1 is at TDC of compression stroke.
Install chain guide, crankshaft sprocket and inner timing chain. Align
inner timing chain mating mark (Silver link) with marks on crankshaft
sprocket. See Fig. 7 . 2. Apply liquid gasket to front cover. Ensure 2
“O” rings are in place on front cover. Install oil pump drive spacer,
front cover and oil pan. Install front engine mount, crossmember and
crankshaft pulley. Install idler sprocket with outer timing chain. Align
inner timing chain mating mark (Silver link) with marks on idler
sprocket. See Fig. 7 . 3. Install idler sprocket shaft from rear.
Install camshaft sprocket with outer timing chain. Align outer timing
chain mating marks with marks on camshaft sprocket. See Fig. 8 . To
complete installation, reverse removal procedure. Tighten all nuts and bolts to specification. See TORQUE SPECIFICATIONS.
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