Gates 33788S Engine Coolant Thermostat

Gates Premium Thermostat 33788S Overview

The Gates Premium Thermostat 33788S is an engine coolant thermostat built for direct replacement in select GM applications. It uses stainless steel and copper construction, an O-ring seal, and a jiggle pin weep hole to support stable coolant control in normal operation.

Compatible With 1992-1997 Chevrolet Corvette, 1993-1997 Chevrolet Camaro, 1994-1996 Chevrolet Caprice, and other listed Buick, Cadillac, Chevrolet, and Pontiac applications, this thermostat is specified as a 180-degree OE-temperature unit.

Key Features

• Premium thermostat design for engine coolant temperature regulation
• Heavy-gauge stainless steel construction with copper components for corrosion resistance
• 180°F start-to-open temperature for OE-style thermal control
• Bottom by-pass design with a jiggle pin weep hole
• O-ring seal type for a direct-fit sealing interface
• Gates Premium Thermostat line focuses on upgraded spring stability under normal operating conditions

Detailed Product Description

Gates 33788S is engineered as a premium engine coolant thermostat for vehicles that require a bottom by-pass configuration and 180-degree opening temperature. The stainless steel and copper construction helps resist corrosion in the cooling system, while the upgraded spring design supports more consistent temperature control during everyday driving. This part cross-references Gates 33788S for the same application.

Fitment includes 1992-1996 Chevrolet Corvette, 1993-1997 Chevrolet Camaro, 1993-1997 Pontiac Firebird, 1994-1996 Buick Roadmaster, 1994-1996 Cadillac Commercial Chassis, 1994-1996 Cadillac Fleetwood, 1994-1996 Chevrolet Caprice, 1994-1996 Chevrolet Impala, and 1994 Chevrolet Commercial Chassis.

Common Cooling System Issues Addressed

• Engine running cooler or hotter than the specified operating range
• Delayed coolant flow control during warm-up
• Temperature fluctuation caused by worn thermostat spring response
• Corrosion-related thermostat wear in the cooling system
• Seal leakage at the thermostat housing interface

Installation Notes and Tips

Verify the vehicle’s thermostat specification, by-pass design, and sealing style before installation. Clean the housing mating surfaces thoroughly and inspect the coolant condition, hoses, and housing for wear or contamination. This part number, 33788S, is listed for select 1992-1997 Chevrolet Corvette and 1993-1997 Chevrolet Camaro applications, along with the other GM models shown in the fitment data.

Quality Assurance

Gates Premium Thermostats are built with corrosion-resistant materials and an upgraded spring for improved temperature stability under normal operation conditions. The product is identified by part number 33788S and is supported by the fitment and construction details provided by Gates.