Toyota 11101-79276 Head Sub-Assy, Cylinder

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On 2.7L engines only, remove the balance shaft assembly. Use your fingernail to feel if a ridge has begun reassembly. If the head was sent out for valve servicing, the valves and related components will already be in place. Begin the reassembly procedure by installing new seals on each of the valve guides, ensuring that intake and exhaust valves have different seals and are not mixed up. Gently tap each intake valve seal into place until it's seated on the guide, using a deep socket and hammer, but avoid hammering on the valve seals once they're seated to prevent damage, and do not twist or cock the seals during installation. Starting at one end of the head, lubricate and install the first valve, applying moly-based grease or clean engine oil to the valve stem. Drop the spring seat or shim(s) over the valve guide and set the valve spring and retainer in place. Compress the springs with a valve spring compressor and carefully install the keepers in the upper groove, then slowly release the compressor, ensuring the keepers seat properly. A small dab of grease can be applied to each keeper to hold it in place if necessary, as the small valve stem keepers are easier to position when coated with grease. Repeat the procedure for the remaining valves, ensuring that components are returned to their original locations. Finally, check the valve spring installed height using a dial or vernier caliper for the most accurate measurement, confirming the distance from the top of the seat/shims to the top of the shield or the bottom of the retainer.

Examine the valve seats for pitting, cracking, or burning, as these conditions require valve service beyond the home mechanic's scope.

Apply a small amount of clean engine oil to the threads and under the bolt heads.

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.

It may be more practical and economical for the home mechanic to purchase replacement head(s) rather than taking the time to disassemble, inspect, and recondition the original(s) due to the necessity of specialized tools for disassembly and inspection procedures, and the potential unavailability of replacement parts.

Clean the lifters with solvent and dry them thoroughly, ensuring they are not mixed up during the process.

Install new seals on each of the valve guides, noting that intake and exhaust valves require different seals - DO NOT mix them up! Gently tap each intake valve seal into place until it's seated on the guide. Caution: Don't hammer on the valve seals once they're seated or you may damage them. Don't twist or cock the seals during installation or they won't seat properly on the valve stems.

Remove the throttle body, air intake plenum, fuel injectors, and fuel rail.

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

Lift the cylinder head off the engine block. If the head is stuck, place a wood block against it and strike the wood with a hammer. Caution: Don't pry between the head and block to avoid damaging the gasket surfaces.

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