This kit is REQUIRED to install the GoWesty coolant pipe repair kit if your Vanagon has an automatic transmission and a 251-121-438B coolant junction.
If your Vanagon still has the original ATF cooler bolted to the front, we strongly recommend replacing it with one of our external coolers—in which case this kit is not required! If you decide to keep your original ATF cooler—again, we think this is a bad idea—please read this article.
Vanagons with the original ATF cooler bolted to the front of the automatic transmissions have a 438B coolant junction (same as was used on all MT vehicles) and a three-way hose (251-121-104) coming off of the largest nipple. That hose will not work with the coolant pipe repair kit. It will be eliminated by replacing the 438B fitting with a 438A fitting and two new hoses.
The three-way hose being replaced runs between (1) the plastic junction (251-121-438B) and (2) the right plastic coolant pipe that runs up to the radiator (large diameter), and (3) over to the transmission cooler at the front of the transaxle (thus the “3-way” designation). This kit replaces the plastic junction with a different one (251-121-428A) that has an extra hose nipple. This extra nipple is plumbed to the transmission cooler, thereby eliminating the need for the 3-way hose. Besides making it possible to install the GoWesty coolant pipe repair kit, eliminating this 251-121-104 hose is generally a good idea. The hoses in this kit that replace the three-way hose are simple, straight pieces of bulk hose you can find anywhere and replace anytime.
• (1) 251-121-438A Coolant Junction
• (1) 251-121-130A Hose
• (1) N-902-873-03 Hose
• (1) 1 Meter - 5/8" Heater Hose
• (2) M6 Stainless Clamps
• Complete Instructions with Larger Photo
Installation: Remove old plastic junction by disconnecting all the hoses that attach to it. Throw away the three way hose and the hose that goes to the right cylinder head. Install new plastic junction and reconnect all other original hoses to their previous locations, and connect all the new hoses to their new locations per the photo above.