Product Description
The MEYLE Coolant Thermostat (028 280 0010) is an original-equipment-quality mechanical thermal regulation valve engineered by MEYLE (Trade Number: MTH0022). Positioned inside the lower cooling flange or water pump housing, its primary operational function is to govern the volume of coolant circulating between the engine block and the radiator based on real-time operating temperatures. When the engine is cold, the thermostat remains securely shut, routing coolant through a tight bypass loop to ensure rapid warm-up, minimal component wear, and immediate cabin heating. Once the engine reaches its calibrated thermal threshold of 80°C, the internal wax capsule expands to open the valve, allowing hot fluid into the radiator. Over decades of driving, thermal cycling can stress the internal spring, causing the valve to stick open (resulting in an engine that runs too cold) or stick closed (inducing immediate, catastrophic engine overheating).
Product Specifications
- Manufacturer: MEYLE
- Item Number: 028 280 0010 (AUTODOC ID: 8586303)
- Trade Number: MTH0022
- Product Condition: New
- Component Classification: Mechanical Coolant Thermostat Core
- Opening Temperature [°C]: 80 (Engineered for early-opening thermal profiles)
- Housing Configuration: Without integrated housing (insert core only)
-
Kit Components Included:
- 1x 80°C Mechanical thermostat core unit
- 1x High-grade elastomeric sealing ring (O-ring)
Vehicle Compatibility
This 80°C thermal valve configuration is precision-calibrated to match the cooling system pressures and flow rates of classic Volkswagen Audi Group (VAG) 4-cylinder and 5-cylinder passenger car lines from the early 1970s through the late 1990s:
| Car Model / Platform | Compatible Engines & Layouts | Engine Displacement Range | Year of Manufacture |
|---|---|---|---|
| VW Golf Mk1 & Mk2 / Jetta Mk2 / Scirocco / Corrado | 1.5 / 1.6 / 1.8 Petrol & 1.6 D / 1.6 TD Diesel lines (Famous codes: DX, EV, PB, RP, GU, KR, SB, JR) |
1457 - 1781 cc | 1974 - 1992 |
| Audi 80 & 90 (B2, B3, B4) / Coupe / Cabriolet | 1.6 / 1.8 / 2.0 4-Cyl & 2.2 / 2.3 5-Cylinder Petrol engines | 1595 - 2309 cc | 1978 - 1996 |
| VW Passat B2, B3 & B4 (32B, 35I, 3A2) | 1.6 / 1.8 / 2.0 Petrol and early 1.6/1.9 Diesel variants | 1595 - 1984 cc | 1980 - 1997 |
| Audi 100 (C3, C4) / A6 C4 Saloon & Avant | 1.8 / 2.0 4-Cyl and classic 2.3L 5-Cyl (AAR) engine layouts | 1781 - 2309 cc | 1982 - 1997 |
⚠️ Opening Temperature Specification Notice: This thermostat features an 80°C opening threshold, which opens earlier than standard 87°C or 92°C variants. This configuration is widely favored in classic high-performance setups (like modified GTI or 5-cylinder engines) or warmer climates to build a safer thermal overhead and keep operating pressures stable. When overhauling the cooling loop, never re-use the old O-ring. Thoroughly scrape away calcium deposits from the plastic or aluminum water outlet flange before installation to prevent slow, nagging coolant leaks under pressure.
Original Equipment Manufacturer (OEM) Reference Numbers
This premium replacement coolant valve cross-references directly with, or serves as a factory-correct swap for, the following original factory catalog codes and premium aftermarket listings:
- VAG (VW / AUDI / SEAT / SKODA): 044121113, 056121113D, 068121113, 068121113H
- FEBI BILSTEIN (Interchange Reference): 01198, 1198
- GATES (Interchange Reference): TH03380G1
- HELLA (Interchange Reference): 8MT 354 774-011, 8MT354774011
- VALEO (Interchange Reference): 820168