Honda S2000 AP1

The AP1 F20C uses intake valve retainers that are known to develop cracks, particularly on cars that have been driven hard or accidentally over-revved past the 9,000 rpm fuel cut-off. A mechanical over-rev from a missed downshift is the most common trigger. If a cracked retainer fails completely, the valve drops into the cylinder and causes catastrophic engine damage requiring a full rebuild (€4,000-8,000+). Preventive replacement with upgraded AP2-spec retainers costs roughly €400-600 including labor at a specialist. Honda revised the retainer design for the AP2. Any AP1 with unknown history or track use should have this work done as a precaution. The retainers can be inspected with the head in place by a knowledgeable specialist.

The F20C uses a hydraulic timing chain tensioner that gradually wears, especially on engines that have spent considerable time at high rpm. Symptoms include a metallic rattle or ticking on startup (warm or cold) that may last a few seconds or become constant as the condition worsens. If the tensioner fails completely, the chain can skip teeth, causing valve-to-piston contact. Replacement involves fitting an updated tensioner along with new chain guides. Parts cost around €200-400, but labor runs 4-6 hours due to access requirements. Total repair at a specialist shop typically runs €600-1,200. Honda released updated tensioner parts. This is widely considered a preventive maintenance item on any AP1 approaching or exceeding 100,000 km.

The S2000 gearbox is known for synchro wear, particularly on 2nd gear. Aggressive shifting, track use, and shifting before the gearbox oil is warm all accelerate wear. Symptoms include grinding or resistance when selecting 2nd or 3rd gear, especially from cold. The issue is worse on earlier MY2000-MY2002 cars. Honda's factory solution was complete gearbox replacement, which is expensive. Specialist rebuild with new synchros, bearings and seals costs €1,200-2,000 for parts and labor. A used replacement transmission costs roughly €1,200-1,500. Using quality gear oil (Honda MTF or equivalent) and allowing the gearbox to warm up before spirited driving helps extend synchro life. AP1-specific 1st and 2nd gear synchros have become increasingly difficult to source.

On a car now 22-26 years old, the soft top is almost certainly showing wear unless it has been replaced. MY2000-MY2001 cars have a plastic rear window that creases, clouds, and eventually cracks. MY2002+ switched to a glass window. The fabric itself wears at contact points where the roof frame touches when folded. Drain channels behind the A-pillars clog with debris, causing water to pool and leak into the cabin or boot. A quality aftermarket replacement top with glass window and professional installation runs €1,200-2,000 in Europe. OEM Honda tops are largely discontinued and command premium prices when available. Many AP1s on the market have already had at least one top replacement. Check for dampness under the carpets and in the boot.

Oil consumption on the AP1 F20C is a well-known characteristic rather than a defect. The VTEC system uses oil pressure to actuate the solenoid, and oil that passes through is not recirculated. Combined with the PCV system design and piston ring tolerances suited for high-rpm operation, consumption of 0.5-1 liter per 3,000 km is considered normal for a frequently revved AP1. Consumption above 1 liter per 1,500 km indicates ring wear or other internal issues. The key risk is not the consumption itself but the consequences of running low on oil in a high-revving engine. Oil starvation during hard cornering can damage bearings and cylinder walls. Use quality full-synthetic oil (avoid certain brands like Mobil 1 which some owners report burns faster in F20C engines), check the level every 1,000 km, and top up as needed.

Honda did not apply extensive underside protection to the S2000. The rear rubber arch protectors trap moisture and road salt against the bodywork, accelerating corrosion. Common rust areas include the rear wheel arch lips (inside the arch), the front arches behind mud flaps, the front subframe, and the boot floor above the exhaust. Cars from coastal regions or countries that use road salt are most affected. Surface rust on structural components can be treated, but advanced corrosion on the subframe may require professional welding and coating (€1,000-2,500 depending on severity). Prevention includes removing the rubber arch protectors and applying protective underseal. Always inspect these areas thoroughly on any purchase candidate.

The clutch master and slave cylinders are wear items that typically need replacement after 120,000-180,000 km. Symptoms include a spongy clutch pedal, difficulty engaging gears, or a clutch pedal that stays down. The repair is straightforward and inexpensive. An OEM master cylinder costs roughly €60-80, the slave cylinder €50-70, and labor is 1-2 hours. It is standard practice to replace both cylinders simultaneously. Some owners also report the clutch pedal becoming progressively heavier over time due to insufficient lubrication at the release fork and bearing, which can be resolved by re-greasing the internal components.

Cars built before spring 2002 were fitted with 2-hole banjo bolts for the piston oil squirters instead of the improved 4-hole design. The restricted oil flow can cause inadequate cooling of cylinder 4 in particular, leading to premature ring and bearing wear. Honda issued a recall to replace these with 4-hole bolts. The repair involves removing the oil pan and swapping the bolts, which takes 2-4 hours. Parts are inexpensive (under €50 for the bolts). Any AP1 built before mid-2002 should have this recall verified. If the banjo bolts have not been upgraded, the work should be done immediately as a precaution.