Lexus 11101-29409 Head Sub-Assy, Cylinder

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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.

Before starting the cylinder head removal process, you should disconnect the negative battery cable and drain the cooling system, including the engine block.

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

Yes.

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.