Toyota 11101-09072 Head Sub-Assy, Cylinder

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Ensure the head is clean before reassembly, even if it was sent for valve servicing. If so, valves and components will be in place. Check the valve spring height with a caliper. Install new seals on valve guides, distinguishing intake and exhaust seals. Tap each intake valve seat into place. Use a socket and hammer to tap valve seals into place. Apply grease or oil to the valve stem before installing the first valve. Place the spring seat or shim(s) over the valve guide and set the spring and retainer. Compress the springs with a compressor and install the keepers. Release the compressor slowly and ensure keepers seat properly. Apply grease to each keeper if needed. Repeat for remaining valves, returning components to original locations. Check the valve spring height again with a caliper.

To prepare for reinstallation, ensure that the mating surfaces of the cylinder head and block are impeccably clean, removing all traces of carbon and old gasket material. Check for any nicks, deep scratches, or other damage on the block and head mating surfaces. Additionally, chase the threads in the cylinder head bolt holes and clean them with compressed air. Run a die down the threads of each bolt to remove corrosion.

The cylinder head should be cleaned with solvent and dried thoroughly before inspection. This ensures that any contaminants or residues are removed from the surface.

After installing the cylinder heads, you should refill the cooling system, change the oil and filter, run the engine, and check for any leaks.

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

If a valve binds in the guide, it should be pushed back into the head and the area around the keeper groove should be deburred with a fine file or whetstone.

Once all valves and related components have been removed and stored in an organized manner, the head should be thoroughly cleaned and inspected. If a complete engine overhaul is being done, finish the engine disassembly procedures before starting the cylinder head cleaning and inspection process.

Check the valve spring installed height with a dial or vernier caliper.

Install the intake and exhaust camshaft assemblies.

To remove the cylinder head, you need to carefully loosen the cylinder head bolts in 1/4-turn increments until they can be removed by hand. It's crucial to loosen them in this specific manner to prevent warping or cracking of the cylinder head. The cylinder head can be lifted off the engine block, and if it's stuck, it should be cautiously pried up at the transaxle end, beyond the gasket surface.

Perform all inspection procedures and make a list of items that need attention.

To remove the cylinder heads, carefully lift each head off the engine block. If a head is stuck, you can use a wood block and hammer to aid in its removal. This process should be repeated for both cylinder heads if necessary.

The first valve can be removed by compressing the springs with a spring compressor, removing the keepers, and then carefully releasing the valve spring compressor to remove the retainer, spring, and spring seat.

Repeat the procedure for the other head.

Valve train components such as lifters, valve springs, spring seats, keepers, and retainers should be cleaned with solvent and dried thoroughly before inspection.