Will the GoWesty Billet Upper Cover for Thermostat Housing fit my 1986–1991 VW Vanagon?

Yes! This Billet Upper Cover is designed to fit all 1986–1991 VW Vanagon models, including 2WD and 4WD, as well as every trim such as Westfalia Camper, Wolfsburg Weekender, Multivan, Carat, and Passenger models. It works with both automatic and manual transmissions, ensuring perfect fitment as a direct replacement for your original thermostat housing cover.

What’s included with the Billet Upper Thermostat Housing Cover, and is installation easy?

Everything you need is included in the kit: the billet aluminum upper cover, a pre-installed bleed nipple, four stainless internal hex fasteners, and four stainless washers. The cover is engineered for a straightforward installation that matches the original part, so if you’re comfortable with basic tools and DIY jobs, you can easily swap it out yourself and enjoy a tidy, leak-free result.

Why should I upgrade to this billet cover instead of keeping the factory thermostat housing?

This GoWesty Billet Upper Cover for Thermostat Housing is machined from ultra-durable billet aluminum and comes with stainless steel hardware, offering superior strength and reliability compared to the stock plastic or cast part. It eliminates a common source of coolant leaks and thermostat housing failures in Vanagons, so you can count on a safer, longer-lasting cooling system. Plus, it matches perfectly with the GoWesty Billet Thermostat Housing Kit for seamless style and performance.

Thumbnail of Billet Upper Cover for Thermostat Housing

Thumbnail of Shown with optional lower housing.

Billet Upper Cover for Thermostat Housing

Product:	GVW-025-121-114
Works With:	1986-1991
Manufacturer:	GoWesty
Restock ETA:
Availability:
Difficulty:	Requires no or basic hand tools and no mechanical knowledge.

Proposition 65: This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm.

Self-certified made in USA of U.S. and imported parts

If you are in need of a new thermostat housing cover, this beefy GoWesty-designed billet aluminum model will outlast everything else on your van. Pair it with our billet aluminum Thermostat Housing Kit and eliminate one more failure-prone component in your cooling system forever.

Kit contains:
• Billet aluminum upper cover
• Pre-installed bleed nipple
• (4) Stainless steel internal hex fasteners
• (4) Stainless washers

Reference numbers can be OE part numbers, superseded part numbers, and compatible part numbers. We provide this information to help ensure you're getting the right part for your needs.