Nissan 11090-4W000 Head Assembly-Cylinder, L

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Cleaning the mating surfaces between the cylinder head and block is crucial, and any damage should be addressed. Chase the threads in the cylinder head bolt holes and clean them thoroughly. Check for warpage in the cylinder head, intake, and exhaust manifolds.

Before commencing the reassembly of the cylinder head, it is essential to ensure that the cylinder head is thoroughly clean, regardless of whether it underwent valve servicing at an automotive repair shop.

Loosen the cylinder head bolts in 1/4-turn increments until they can be removed by hand, then lift the cylinder head off the engine block.

Confirm the squareness of each valve spring and replace any distorted or sagged springs.

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.

Replacement parts may not be readily available and specialized tools are necessary for the disassembly and inspection procedures.