Gates 42131 Engine Water Pump Mazda Miata 323 Protege Ford Escort Tracer Mercury

Vehicle Fitment

• 1988-1989 Mazda 323 (All Trims, L4 1.6L GAS) - FWD
• 1990-1993 Mazda MX-5 Miata / Miata NA (All Trims, L4 1.6L B6 GAS) - RWD
• 1990-1994 Mazda Protege (All Trims, L4 1.8L DOHC GAS) - FWD
• 1991-1996 Ford Escort (All Trims, L4 1.8L GAS) - FWD
• 1991-1994 Mercury Capri (All Trims, L4 1.6L GAS) - FWD / RWD
• 1991-1996 Mercury Tracer (All Trims, L4 1.8L GAS) - FWD

Fitment Notes

• Fits the Mazda B6 1.6L and B8 / BP 1.8L four-cylinder engine families as used in the Miata NA, 323, Protege, Ford Escort, Mercury Capri, and Mercury Tracer - confirm your engine displacement and configuration before ordering.
• This pump is NOT timing belt driven - it is driven by the accessory/serpentine belt system. Replacement does not require timing belt removal on most applications, though timing belt service is recommended concurrently on high-mileage vehicles.
• All necessary gaskets and seals are included in the box - no separate gasket kit purchase required. The package contains the water pump body, two flat gaskets, one L-shaped gasket, and one O-ring covering all sealing interfaces on these applications.
• This is a new water pump - NOT remanufactured. Gates does not sell remanufactured water pumps in its aftermarket line.
• Sold individually - one (1) water pump assembly with included gasket kit per package.

Features

• New, never remanufactured construction - Gates manufactures the 42131 as a new unit using fresh premium alloy materials throughout, not a remanufactured core rebuild, ensuring the pump arrives with full factory-specification clearances, seal integrity, and bearing condition without the variability inherent in remanufactured units.
• 100% leakage tested - every Gates 42131 undergoes individual leakage testing of both the raw casting and the fully assembled pump before leaving the factory, verifying that the housing, seals, and all mating surfaces hold pressure without leaks under test conditions that replicate real-world coolant system pressure demands.
• 100% functional test of seals and bearings - in addition to leakage testing, each pump is individually tested for seal and bearing function, confirming proper shaft rotation, bearing smoothness, seal retention, and impeller alignment before shipment.
• Cast aluminum housing - the pump body is cast from aluminum alloy for OE-matching weight, thermal properties, and corrosion resistance, providing dimensional stability across the operating temperature range of the Mazda B-series and Ford 1.8L engines it serves.
• Stamped steel impeller - the corrosion-resistant stamped steel impeller maintains consistent coolant flow delivery across the pump's service life without the fragility and delamination risk of plastic impellers used in some budget replacement units on these applications.
• OE-equivalent fit and gasket inclusion - the 42131 is dimensionally matched to OEM specifications for the Mazda 323, Miata NA, Protege, Ford Escort, Mercury Capri, and Mercury Tracer cooling system interfaces, and includes the complete gasket set (two flat gaskets, one L-shaped gasket, one O-ring) required for a complete installation without supplemental parts purchases.
• Gates OEM supplier credibility - Gates Corporation manufactures timing and cooling system components as an OEM supplier to major automakers globally, bringing first-fit engineering standards to its aftermarket product line rather than designing to a lower-cost aftermarket specification.

Specifications

• Part Number: 42131
• Brand: Gates Corporation
• Part Type: Engine Coolant Water Pump - Standard
• Construction: New - never remanufactured
• Housing Material: Cast Aluminum
• Impeller Material: Stamped Steel (corrosion-resistant)
• Impeller Rotation: Standard
• Number of Outlets: 1
• Timing Belt Driven: No
• Testing: 100% leakage tested (casting and assembled); 100% functional test of seals and bearings
• UPC: 072053782592
• Weight: 3.20 lbs.
• Quantity: Sold individually (1x water pump assembly)

Included Components

• 1x Gates 42131 Engine Water Pump
• 2x Flat Gaskets
• 1x L-Shaped Gasket
• 1x O-Ring

Product Description

The Gates 42131 is a new, never remanufactured engine coolant water pump for the Mazda B6 1.6L and B8/BP 1.8L four-cylinder engine family, covering the 1988-1989 Mazda 323, 1990-1993 Mazda MX-5 Miata NA, 1990-1994 Mazda Protege, 1991-1996 Ford Escort, 1991-1994 Mercury Capri, and 1991-1996 Mercury Tracer. Built with a cast aluminum housing and corrosion-resistant stamped steel impeller, it delivers OE-equivalent coolant flow and thermal management for these applications. Every unit is individually leakage tested at both the raw casting and fully assembled stages and undergoes a 100% functional test of seals and bearings before leaving the factory - a quality standard that eliminates the seal and bearing failures at installation that plague lower-tier replacement pumps. The complete gasket kit is included in the box, covering all sealing interfaces without requiring a separate gasket purchase.

Gates approaches the 42131 as a new-manufacture part rather than a remanufactured rebuild, which matters on these applications for reasons beyond marketing. Remanufactured water pumps for the Miata NA, Protege, and Escort-platform engines frequently use reconditioned cores where original casting porosity, bearing journal wear, or impeller erosion is simply cleaned and painted rather than corrected - problems that may not surface during post-reman testing but manifest as early leaks or reduced coolant flow under sustained operating conditions. The 42131 starts from new materials throughout, giving it factory-specification clearances, seal integrity, and bearing condition without any of these carried-over variables. The stamped steel impeller is specifically noted by Miata and Protege owners as a significant advantage over the plastic impellers used in some competing replacement pumps for these engines, which are prone to delamination from the hub under sustained heat cycling.

The 42131 is not timing belt driven on these applications - it runs off the accessory belt system, which simplifies replacement on many of these vehicles relative to timing belt-driven pumps. However, on high-mileage examples where timing belt service is already due, replacing the water pump concurrently is strongly recommended given the shared coolant system service interval and the labor savings of addressing both at the same time. The pump installs to OE dimensional specifications with no modifications required. All gaskets needed for a complete installation - two flat gaskets, one L-shaped gasket, and one O-ring - are included in the package.