Gates 33478S Engine Coolant Thermostat

Gates 33478S Premium Thermostat Overview

The Gates 33478S Premium Thermostat is built for stable engine temperature control in a wide range of Ford, Isuzu, Nissan, Subaru, Mazda, Geo, Honda, and related applications. It uses stainless steel and copper construction with an upgraded spring to help maintain consistent opening behavior under normal operating conditions.

For drivers searching for a 180 degree engine coolant thermostat for a Ford Ranger, Nissan 720, or Isuzu Trooper, this premium thermostat is built for direct cooling-system service with OE-style temperature control.

Key Features

• Premium thermostat design for engine coolant temperature regulation
• Stainless steel and copper construction for improved corrosion resistance
• Upgraded spring for greater temperature stability during normal operation
• Offset reverse poppet design
• 180 degree start-to-open temperature
• Jiggle pin weep hole included
• Gates part number 33478S

Product Details

The Gates Premium Thermostat line focuses on durable cooling-system components with materials selected for long service life. This 33478S thermostat uses a heavy-gauge stainless steel body with copper elements and an offset reverse poppet design to support controlled coolant flow. It is a practical choice for owners maintaining older import and domestic vehicles where accurate thermostat operation matters for warm-up behavior and operating temperature.

This part cross-references Four Seasons 65858 for the same application. It is listed for vehicles including the 1996-2008 Ford Ranger, 1984-1991 Isuzu Trooper, 1986-1989 Nissan D21, and 1977-1988 Nissan 200SX, among many others.

Common Issues This Part May Address

• Engine running cooler or warmer than expected
• Slow warm-up after cold starts
• Temperature fluctuation during normal driving
• Cooling-system service on aging OE thermostat assemblies
• Corrosion-related thermostat wear in the housing area

Installation Notes and Tips

Verify the 180 degree start-to-open specification before installation. Confirm housing condition, sealing surfaces, and coolant quality during service. This thermostat does not include an installation tool, so use the correct service tools for your vehicle and follow the manufacturer’s cooling-system bleed procedure after installation.

Compatible With 1996-2008 Ford Ranger, 1996-2001 Ford F-100 Ranger, 1998-1999 Ford Taurus, 1991-1997 Isuzu Rodeo, 1994-1996 Honda Passport, 1981-1995 Isuzu Pickup, 1989-1994 Isuzu Amigo, 1992-1993 Geo Storm, 1991-1993 Isuzu Stylus, 1992-1992 Isuzu Impulse, 1988-1990 Isuzu Impulse, 1991-1992 Isuzu Impulse, 1983-1987 Isuzu Impulse, 1984-1991 Isuzu Trooper, 1985-1989 Isuzu I-Mark, 1981-1981 Isuzu I-Mark, 1986-1989 Nissan D21, 1983-1989 Nissan Pulsar NX, 1977-1988 Nissan 200SX, 1987-1988 Nissan Pathfinder, 1988-1988 Nissan Pulsar NX, 1982-1988 Nissan Sentra, 1976-1987 Subaru Standard, 1980-1986 Nissan 720, 1984-1985 Mazda 626, 1982-1984 Isuzu I-Mark, 1982-1984 Nissan Maxima, 1979-1983 Nissan 280ZX, 1983-1983 Nissan Pulsar, 1979-1982 Nissan 210, 1979-1982 Nissan 310, 1978-1981 Nissan 510, 1968-1973 Nissan 510, and 1977-1981 Nissan 810.

Quality Assurance

Gates designs Premium Thermostats with corrosion-resistant materials and an upgraded spring to support consistent temperature control in normal operation. Part number 33478S is built to meet the needs of service replacement in a broad range of cooling-system applications.