Genuine 1989 Toyota Land Cruiser Cylinder Head

1989 Toyota Land Cruiser Cylinder Head Parts Questions & Experts Answers

• Q: How Should You Properly Reassemble a Cylinder Head After Valve Servicing for the 1989 Toyota Land Cruiser?

  A: Regardless of whether a head was sent to an automotive repair shop for valve servicing, ensure it is clean before beginning reassembly. If a head was sent out for valve servicing, the valves and related components will already be in place, so start the reassembly procedure with the next step. Install new seals on each of the intake valve guides by gently tapping each seal into place with a hammer and a deep socket or seal installation tool until it is completely seated on the guide, ensuring the new valve stem seals are seated against the tops of the valve guides without twisting or cocking them during installation. The umbrella-type seals are installed over the valves after they are in place. Starting at one end of the head, lubricate and install the first valve, applying moly-base grease or clean engine oil to the valve stem. Place the spring seat or shim(s) over the valve guide and set the valve springs, shield, and retainer in place, noting that later models have progressively wound valve springs which should be installed with the closely wound coils toward the cylinder head. Compress the springs with a valve spring compressor, position the keepers in the upper groove, then slowly release the compressor to ensure the keepers seat properly, adding a small dab of grease to each keeper if necessary to hold it in place. Repeat the procedure for the remaining valves, ensuring that all components are returned to their original locations without mixing them up. Finally, check the installed valve spring height using a ruler graduated in 1/32-inch increments or a dial caliper; if the head was sent out for service work, the installed height should be correct, but it is important to verify this. The measurement is taken from the top of each spring seat or shim(s) to the top of the oil shield or the bottom of the retainer, which are the same points. If the height exceeds the specified measurement, shims can be added under the springs to correct it.