Nissan 11040-4W005 Head Assy-Cylinder

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The lifters on 3.3L engines should not be laid on their side or upside down. If they need to be laid on their side, they should be submerged in a pan of clean engine oil until reassembly.

Take off the intake manifold, timing belt, camshaft sprocket, and rear timing belt cover. Remove the rocker arm components, lifters, and exhaust manifold. Disconnect hoses and electrical harness connectors, as well as the coolant pipes. Remove the air conditioning compressor, power steering pump, and alternator. Take off the compressor bracket, power steering pump bracket, and alternator bracket. Remove the distributor.

Clean and apply sealant to the rear timing chain cover. Install new O-rings in the front of the engine block and in the variable valve timing oil control orifices. Place and tighten the rear timing chain cover, install the camshafts, timing chains, and sprockets, and adjust the valve clearance if necessary.

Note that 3.3L engines have an inner and outer valve spring.

Install the removed components, position the new cylinder head gasket, and apply clean engine oil to the cylinder head bolt threads and hardened washers before tightening the bolts in the recommended sequence. Reinstall the lifters, shims, and camshafts, adjusting valve clearances if necessary due to prior machine work on the cylinder head.

Valve seats within the combustion chambers should be examined for pitting, cracks, or burning. Extensive damage may require valve service beyond home mechanic capabilities.