How do I know if this Pressure Cap will fit my Vanagon's coolant expansion tank?

Great question! This Pressure Cap is designed specifically for the Vanagon's coolant expansion tank. Most Vanagons from 1986-1991 use a blue cap, while earlier models (1980-1985) typically use a black cap. It's a good idea to check your Vanagon's model year and look at the cap currently on your expansion tank to ensure you're selecting the same style. If you’re unsure, just compare the product photos and descriptions—if your cap looks the same, you’re good to go!

What's the difference between the blue and black Pressure Caps for Vanagons?

The color of the Pressure Cap matters! Blue caps are rated for a higher pressure and are typically used on 1986-1991 Vanagons with a plastic coolant expansion tank. Black caps were original to 1980-1985 models and may have a slightly different pressure rating. If your Vanagon is a later model or has a plastic tank, stick with the blue cap; for early models or if you have a metal tank, the black cap is likely what you need.

Is installing this replacement Pressure Cap something I can do myself?

Absolutely! Swapping out the Pressure Cap on your Vanagon’s coolant expansion tank is a very straightforward job. Just make sure the engine is cool, twist off the old radiator cap, and screw on the new one—no special tools required. A proper seal from your new cap helps keep your coolant system running reliably. If you have any doubts, GoWesty’s support team is happy to walk you through the process.

Pressure cap with release lever on white backgound

Pressure Cap with warning label on white backgound

Underside of pressure cap on white background

Thumbnail of Pressure cap with release lever on white backgound

Thumbnail of Pressure Cap with warning label on white backgound

Thumbnail of Underside of pressure cap on white background

Pressure Cap (Coolant Expansion Tank) [Vanagon]

Product:	COOL-SFTY-CAP
Works With:	1983-1991
Manufacturer:	GoWesty
Restock ETA:
Availability:
Wrench Rating:	Requires no or basic hand tools and no mechanical knowledge.

$3.95 - $4.95

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

Replacement Pressure Cap (aka radiator cap) with for the GoWesty Aluminum Expansion Tank. If you have our all-metal tank and somehow lost your cap (or yours is defective), here is the replacement you need.

Options: We offer two distinct styles of cap depending on which generation GoWesty Aluminum Expansion Tank you have. Our earlier version featured a cap with a red pressure release lever, and our current version (black powder coated) features a standard flat top cap with a yellow warning label on it. Please select the correct cap for your tank in the drop-down menu.