Mercury 7U7Z-6049-BALH Cylinder Head Assembly

You can Select Your Vehicle to check if 7U7Z-6049-BALH fits your vehicle.

1. Disconnect the cable from the negative battery terminal. 2. Drain the cooling system. 3. Remove the engine from the vehicle and mount it on an engine stand. 4. Remove the intake manifold. 5. Label and disconnect the electrical connectors from the fuel injectors. 6. Remove the exhaust manifolds. 7. Remove the drivebelt and the drivebelt tensioner.

Remove the air conditioning compressor mounting bolts from the bracket, lift the compressor off without disconnecting the hoses, and secure it aside.

15. Disconnect the radio capacitor from the side of the ignition coil pack. 16. Remove the ignition coil assembly. 17. Remove the accessory bracket mounting bolts and position it off to the side. 18. Remove the hydraulic chain tensioner. 19. Remove the bolt from the camshaft sprocket, then remove the Torx bolt below it in the head, which secures the camshaft chain cassette to the head. 20. Remove the bolt holding the chain cassette to the head and pull up on the chain while slipping the sprocket out. Keep the slack out of the chain and tie it to the cassette with a large rubber band.

Due to limited working space, the following procedure is written using the manufacturer's recommended method, with the engine removed from the vehicle.

Remove the exhaust manifolds.

Take particular care as aluminum alloy is easily damaged. Ensure that carbon does not enter the oil and water passages, especially the lubrication system.

Before installing the cylinder head, turn the camshaft until the pin is in the five o'clock position to avoid damage to the valves.

Unwrap or cut the tape to detach the harness from the retainer.

Lubricate the new replacement cylinder head bolts with clean engine oil before placing them in position.

Disconnect the cable from the negative battery terminal.

Carefully position the head gaskets on the block using the dowels for alignment, ensuring the UP or TOP mark is visible. Note that the left and right head gaskets are different. Caution: Do not use any kind of gasket sealant material on the head gaskets.

Don't, under any circumstances, shim the springs to the point where the installed height is less than specified.

Thorough cleaning of the cylinder head(s) and related valve train components, followed by a detailed inspection, will enable you to decide how much valve service work must be done during the engine overhaul.

Drop the spring seat or shim(s) over the valve guide and set the valve spring and retainer in place.

Check for nicks, deep scratches, and other damage. If damage is slight, it can be removed with a file; if excessive, machining may be necessary.

New and rebuilt cylinder heads are commonly available for most engines at dealerships and auto parts stores.