1998 Honda Prelude

The H22A4 DOHC VTEC engine in the 1997-2001 Prelude uses a timing belt that must be replaced at 105,000-mile intervals. A failed timing belt will cause catastrophic internal engine damage as the H22A is an interference engine. Many used Preludes have unknown timing belt history, making this the most critical maintenance item for any buyer.

Replace the timing belt, timing belt tensioner, and water pump as a set. The water pump is driven by the timing belt and is accessible only during belt replacement, so replacing it simultaneously is strongly recommended. Replace the front crankshaft and camshaft seals at the same time. Use only OEM Honda or quality aftermarket Gates/Aisin timing components.

The power steering pump on the 5th-generation Prelude is known for developing a whining noise and fluid leaks after 100,000 miles. The pump's internal vanes wear out, causing a loud whine at low speeds and during parking maneuvers. Fluid leaks from the pump housing and high-pressure line connections are also common.

Replace the power steering pump with an OEM or quality remanufactured unit. Flush the power steering system and replace the fluid with Honda Power Steering Fluid (genuine Honda PS fluid is recommended over generic ATF). Inspect the high-pressure and return lines for leaks and deterioration and replace as needed.

The A/C compressor on the 5th-gen Prelude, now over 25 years old, frequently fails due to clutch bearing wear and internal compressor degradation. The system uses R-134a refrigerant, but aged O-ring seals and hose connections cause slow leaks that deplete the system. The receiver-dryer also becomes saturated with moisture after decades of service.

Replace the A/C compressor, receiver-dryer, expansion valve, and all O-rings in the system. A complete system flush is necessary if the compressor shed debris. Given the vehicle's age, replacing all rubber A/C hoses is recommended to prevent future leak points. Evacuate and recharge with the correct amount of R-134a.

The rear main crankshaft seal on the H22A engine can develop a slow oil leak that drips onto the flywheel and clutch, causing clutch slip and a burning oil smell. The leak worsens over time and can contaminate the clutch friction material, necessitating clutch replacement in addition to the seal.

Replace the rear main seal, which requires transmission removal. If the clutch has been contaminated with oil, the clutch disc and pressure plate must also be replaced, and the flywheel resurfaced. It is cost-effective to do a complete clutch service at the same time since the transmission is already out.

At the age of a 1999 Prelude, the front lower control arm bushings, rear trailing arm bushings, and compliance bushings are likely deteriorated, cracked, or completely torn. Worn bushings cause sloppy handling, pulling to one side, uneven tire wear, and clunking noises over bumps. The double-wishbone front suspension is sensitive to bushing wear.

Replace all worn suspension bushings with OEM or polyurethane aftermarket alternatives. A full suspension bushing refresh on a 5th-gen Prelude typically includes front lower arm bushings, rear trailing arm bushings, rear upper arm bushings, and sway bar end links. Perform a 4-wheel alignment after bushing replacement.