Nissan 13207-81W00 Seal-Oil Valve

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To do this, you will need a compressed air system and special tools. After removing the valve cover and top timing chain, camshaft and lifters should be removed from affected cylinder head. In case you plan to replace all the valve stem seals, remove all spark plugs. Put the piston of the bad-cylinder at TDC in its compression stroke by turning the crankshaft. Place an adapter into the spark plug hole and use compressed air on that cylinder. For protection against debris entering the engine, fill with old rags around each valve. Use a spring compressor to compress spring and remove valve stem keepers. Pay attention to any bending or misalignment of the valve stem. Replace valve stem seals, lubricate valve stems then reinstall valve springs, retainers and keepers. Take off compressed air then reset camshaft, lifters, timing chain, valve cover then spark plugs and plug wires. Finally start as well as run an engine; check oil leaks and abnormal valves covers sounds.

Turn the crankshaft until the piston in the affected cylinder is at Top Dead Center on the compression stroke, starting with cylinder number one and working through the firing order.

After removing the valve covers, proceed to remove the timing chain, camshafts, and lifters from both cylinder heads.

Use a valve spring compressor to compress the spring, releasing the valve keepers and removing them with pliers or a magnet.

Lubricate the valve stems with engine oil and install new valve stem seals, which can be installed with a special tool or a deep socket and hammer-tapped until seated.

A valve spring compressor is used to compress the spring.