Acura 10003-P75-A02 General Assembly, Cylinder Head

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It's much easier to disassemble and work on the engine if it's mounted on a portable engine stand, which can often be rented cheaply from an equipment rental yard; however, before mounting, the flywheel/driveplate should be removed. If a stand isn't available, disassembly can still be done with the engine blocked up on the floor, but extra care must be taken to avoid tipping or dropping the engine. When obtaining a rebuilt engine, all external components must be removed first for transfer to the replacement engine, including the alternator and brackets, power steering pump and brackets, emissions control components, distributor, spark plug wires and plugs, thermostat and housing cover, water pump bypass pipe, fuel injection components, intake/exhaust manifolds, oil filter, engine mounts, and clutch and flywheel or driveplate. Attention to detail is crucial when removing these components, as noting the installed position of gaskets, seals, spacers, pins, brackets, washers, bolts, wiring, and other small items will be helpful during installation. If acquiring a short block, which includes the engine block, crankshaft, pistons, and connecting rods, the cylinder head(s), oil pan, and oil pump will also need to be removed. For a complete overhaul, the engine must be disassembled in a specific order, starting with the intake and exhaust manifolds, valve cover, timing belt covers and bolts, timing belt and sprockets, rocker arm assembly and camshaft(s), cylinder head, water pump, oil pan, oil pump and pick-up tube, oil jets (for specific engine models), piston/connecting rod assemblies, rear main oil seal retainer, main bearing caps (or bearing cap bridge) and lower main bearings, and finally the crankshaft and upper main bearings. Before beginning assembly and overhaul procedures, ensure that common hand tools, small cardboard boxes or plastic bags for storing parts, a gasket scraper, ridge reamer, vibration damper puller, micrometers, telescoping gauges, dial indicator set, valve spring compressor, cylinder surfacing hone, piston ring groove cleaning tool, electric drill motor, tap and die set, wire brushes, oil gallery brushes, and cleaning solvent are available.

Ensure the head is clean before beginning reassembly, regardless of whether it was sent to an automotive repair shop for valve servicing.

If the inspection reveals that the valve components are in poor condition and worn beyond specified limits, reassemble the valves in the cylinder head.

If renting a hoist, it should be arranged in advance, and all possible operations should be performed beforehand to save money and time.

Reinstall the rocker arm assemblies in the cylinder head, place a new gasket on the engine block ensuring any markings face up, and set the cylinder head in position. Lubricate the threads and seats of the cylinder head bolts with clean engine oil, install them, and tighten to the recommended torque.

Support the engine with a floor jack, placing a wood block between the jack pad and the oil pan to avoid damage.

It is important to label the parts or store them separately for reinstallation in their original locations.

Rebuilding alternatives include purchasing individual parts if the engine block and components are reusable, which may be the most economical choice, provided that careful inspection is conducted.

Remove the air cleaner assembly and air intake duct, labeling all vacuum lines, emissions system hoses, electrical connectors, ground straps, and fuel lines for reinstallation.

To save time and avoid problems, follow this general order for reassembly: 1. Piston/connecting rod assemblies for various engine models 2. Crankshaft and main bearings 3. Rear main oil seal and retainer 4. Additional piston/connecting rod assemblies for other models 5. Oil pan baffle 6. Oil pump and pick-up 7. Oil pan 8. Cylinder head 9. Camshaft(s) and rocker arm assembly 10. Water pump 11. Timing belt and sprockets 12. Intake and exhaust manifolds 13. Timing belt covers 14. Valve cover 15. Flywheel/driveplate.