Performance Water Pump & Timing Belt Kit for Toyota MR2 (1991-1994) 2.2L

Heavy-Duty Timing Belt & Water Pump Refresh Kit for 1991-1994 Toyota MR2 (SW21)

What it Does: The Performance Water Pump & Timing Belt Kit replaces worn synchronizing and cooling hardware on the 1991-1994 Toyota MR2 to maintain precise valvetrain timing and prevent catastrophic thermal runaway.

The Stock Toyota MR2 Timing and Cooling Degradation

The mid-engine bay of the SW21 chassis traps ambient thermal energy, subjecting rubber compounds and bearing grease to accelerated dry rot and degradation. Factory timing belts on the 5S-FE endure continuous cyclic shear load, leading to tooth sheer, belt stretch, and delayed cam timing. Simultaneously, OEM water pump mechanical shaft seals fatigue from heat cycles, weeping coolant past the bearing assembly and triggering premature bearing seizure, coolant loss, and radial runout.

The Engineering Solution

This comprehensive overhaul kit features an HNBR-formulated high-tensile 163-tooth timing belt engineered to resist longitudinal stretching, oil contamination, and thermal cracking under high-RPM operation. Paired with a heavy-duty, direct-fit cast aluminum water pump equipped with precision-ground impellers and long-life mechanical shaft seals, the assembly delivers maximum fluid volumetric flow across the mid-ship cooling circuit. Premium sealed tensioner and idler bearings minimize frictional drag, while replacement Viton-grade camshaft and crankshaft front main seals stop oil contamination at the source.

What's Included

• 1 Timing Belt (163 teeth)
• 1 Tensioner Roller Bearing
• 1 Idler Bearing
• 1 Crankshaft Seal
• 1 Camshaft Seal
• 1 Water Pump with gaskets

Technical Specifications

Compatibility

• 1991-1994 Toyota MR2 Base / Coupe / T-Bar 2.2L (5S-FE DOHC 4-cylinder)

Frequently Asked Questions & Fitment Warnings

Does this fit the SW21 MR2?

Yes, this is a direct fit for the 1991-1994 Toyota MR2 equipped with the 5S-FE 2.2L or 3S-FE 2.0L DOHC 4-cylinder engine. Does not fit 3S-GTE Turbo models, V6 engine swaps, or 1.6L AW11 platforms.

Do I need to bleed the mid-engine cooling system after installing the water pump?

Yes, the long coolant plumbing runs on the SW21 require complete radiator and heater-core air burping using service petcocks to prevent air pockets.

The Toyota Caliber

Maintain proper mid-engine balance and crisp mechanical throttle response across the powerband by safeguarding your valvetrain with exact-pitch timing components and true OE-spec thermal management.