Aluminum Coolant Expansion Tank

Original Vanagon cooling components were merely adequate at best from the factory.  Largely made of plastic, they often cracked within a few years of service as constant heat cycling took its toll.  As the years went by and VW corporate support of the Vanagon waned, it became harder to find original factory parts and we Vanagon drivers were forced to use whatever inferior aftermarket parts we could find.  This especially was true of the coolant expansion tank.  Thin and with brittle seams, aftermarket replacements were a continual disappointment.  If you've ever been stranded on the side of the road with a cracked expansion tank, you'll understand our frustration.  


Rocky Mountain Westy's solution was to create our own tank from scratch.  Our Aluminum Coolant Expansion Tank is a heavy duty solution that is what the original component should have been.  Heavy gauge aluminum is hand TIG-welded and includes a coolant level sensor and Stant Lev-r cap.  Buy it once and be freed from the time bomb that is your plastic tank.


We sell three options:


1.9L 

1" Inlet 

1" Outlet 


2.1L 

1" Inlet 

5/8" Outlet 


Subaru Conversion 

5/8" Inlet

5/8" Outlet