My Vanagon has a different coolant junction installed. Will this GoWesty aluminum version fit, and what alternative hoses might I need for proper compatibility?

This GoWesty aluminum coolant junction is designed as a direct replacement for the original plastic part ending in -438B, which used a specific coolant hose (part number 251-121-130B). If your current junction's hose fitting is in the same location as the -438B, this GoWesty part is an excellent upgrade. However, if your Vanagon has an older style junction (part number ending in -438A) with a differently oriented hose fitting, you will also need to purchase the 251-025-130B hose for correct mating. Always compare the orientation of your existing hose fitting with the product images to ensure a proper fit.

Is this aluminum coolant junction compatible with my 1988 Vanagon, and is the installation process difficult?

Yes, this aluminum coolant junction is compatible with all 1986-1991 water-cooled 2WD Vanagons, including your 1988 model. The installation involves replacing the old plastic unit. For enhanced stability, this aluminum version includes an additional mounting stud. We provide a downloadable PDF template to guide you in accurately drilling the hole for this stud, which requires a 1/4" drill bit.

Given the known issues with plastic coolant components, how does this aluminum version offer superior durability and why is it considered a 'bomber' replacement?

Your concern about plastic coolant parts is valid. This GoWesty junction is precision-machined from robust, 4mm black anodized aluminum, offering exceptional strength and resistance to the heat and pressure cycles that degrade plastic over time. Featuring an extra mounting bolt for increased support, it is engineered to be a long-lasting solution for your 2WD Vanagon's coolant system.

My Vanagon is an automatic with an ATF cooler. How does this impact the installation of the new coolant junction?

If your automatic transmission Vanagon still has the original ATF cooler with its attached coolant hoses, this will need to be considered during the installation of the new coolant junction. While this aluminum coolant junction will physically fit, you will also need to address the ATF cooler setup. We strongly recommend upgrading to our external ATF cooler, which is designed for seamless integration and provides significant benefits for your transmission's longevity. Further details on the importance of this upgrade can be found in our linked article.

Coolant Junction (Aluminum)[2WD Waterboxer] | GVW-251-121-438-UNI

Name: Coolant Junction (Aluminum)[2WD Waterboxer]
SKU: GVW-251-121-438-UNI
Price: 115.0 USD
Availability: InStock

Coolant Junction (Aluminum)[2WD Waterboxer]

Product:	GVW-251-121-438-UNI
Works With:	1986-1991
Manufacturer:	GoWesty
Availability:	Low Stock
Wrench Rating:	Requires some hand & power tools and minimal mechanical knowledge.

$115.00

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This GoWesty, all-metal coolant junction is a direct replacement for the original plastic 025-121-438B coolant junction. It is made out of black anodized 4mm thick aluminum and features an additional mounting bolt for extra support. It is simply bomber, and will be the last coolant junction you will ever have to buy for your Vanagon!

Fits: All 1986-91 watercooled 2WD Vanagon. Will NOT fit 4WD Syncro.

Backstory: Volkswagen made three different iterations of coolant junctions for the 2WD, and ultimately came up with their final version whose part number ends in -438B. It required a superior coolant hose (part number 251-121-130B) to go with it. We modeled our coolant junction after the -438B because it and the -130B hose that fits it are simply superior to the earlier versions. It was after all VW’s last configuration for good reason!

• If your Vanagon has a coolant junction with the hose located at this -438(B) location: You already have the better 251-121-130B hose (good time to replace it!).

• If your van has a coolant junction with the hose located at this -438(A) location, you will also need to buy a 251-025-130B (see photo showing the difference).

• If your van has an automatic transmission that still has the obsolete ATF cooler bolted to the front with two coolant hoses running to it, you will also need one of our external ATF cooler which is highly recommended no matter what, read this article to learn why.

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Great replacement to the factory plastic unit. Very easy to install with provided mounting studs.

Couldn't believe GoWesty was able to ship my parts from California to Massachusetts in 19 hours! Forever Grateful was able to get up to Jerry Jam in Vt! Superstoked!

Excellent part!

I purchased the gasoline heater and heater elimination kit. I removed the VW rear heater, when I tried to remove the tee's, my problems started. wrangling the heater hose broke off the plastic piece 1991 coolant junction, losing coolant. I investigated a ne coolant junction and The Go Westy was the best and most economical fix. The installation was not difficult considering I don't have a garage to work in. I wish the diagram for drilling an additional hole was printed at 100%, so I did not use the additional bolt. The plastic coolant junction was the one installed at the factory and the nipple that broke off was crystalized. I am glad this happened in my driveway and not at an Olympic Mountain Trailhead.