Gates 34016S Engine Coolant Thermostat

Gates Premium Thermostat 34016S Overview

The Gates Premium Thermostat 34016S is an engine coolant thermostat built for stable temperature control and corrosion resistance. It uses heavy-gauge stainless steel construction with copper components and an upgraded spring to help maintain consistent opening performance in normal operation.

Compatible with select Volkswagen Beetle, Golf, Jetta, and Passat applications, as well as Audi 4000 models, this thermostat is a direct-fit cooling system service part for OE-temperature replacement needs. The Gates 34016S is a practical choice when servicing a Volkswagen Beetle thermostat, Volkswagen Jetta thermostat, or Audi 4000 cooling system.

Key Features

• Premium thermostat design for engine coolant temperature regulation
• Stainless steel and copper construction for improved corrosion resistance
• Upgraded spring for more consistent temperature stability
• Bottom by-pass design with O-ring seal type
• Start-to-open temperature: 188°F / 87°C
• Sealing flange outside diameter: 2.12 in.
• Height: 2.22 in.; height between flanges: 1.4 in.
• No jiggle pin weep hole and no installation tool included

Product Details

Gates Premium Thermostat 34016S is engineered as an OE-temperature engine coolant thermostat for vehicles that require reliable coolant flow control. The stainless steel housing and copper elements support corrosion resistance, while the spring calibration helps the thermostat respond consistently as coolant temperature rises. This part cross-references Dorman HELP 38499 for the same application.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Delayed coolant circulation during warm-up
• Temperature fluctuation from weakened thermostat spring tension
• Corrosion-related thermostat housing deterioration
• Cooling system service on Volkswagen Beetle, Golf, Jetta, Passat, and Audi 4000 models

Installation Notes

Verify the OE temperature specification, bypass design, and seal style before installation. Clean the thermostat housing mating surfaces thoroughly and inspect the cooling system for contamination or damaged seals. This Gates 34016S thermostat uses an O-ring seal and does not include an installation tool.

Fits 1998-2006 Volkswagen Beetle, N/A; 1998-2006 Volkswagen Golf, N/A; 1998-2006 Volkswagen Jetta, N/A; 2004-2005 Volkswagen Passat, N/A; 1984-1987 Audi 4000, N/A.

Quality Assurance

Gates Premium Thermostat components are built with upgraded materials and spring calibration to support stable operation under normal driving conditions. The 34016S follows the brand’s premium thermostat construction standards for cooling system service.