Moroso Performance Aluminum Expansion Tank - E36, Z3

Product Details

If you have ever experienced a leaking plastic BMW expansion tank you will realize the value of this aluminum version straight away. Even if a failure has not happened to you, it's easy to tell this tank is much stronger and more durable than the plastic used in the stock design. The original BMW plastic tanks suffer from leaks and failures with no warning. While being lightweight and recyclable the design and construction of the stock tank is just not up for reliable long term use.

Moroso coolant expansion tanks are all pressure tested for guaranteed leak-free operation and utilizes the stock pressure cap to prevent excessive pressure in the cooling system from blowing off a radiator hose or seal!

Features:

• Each cooling system expansion tank includes a 1/8 in. pipe overflow fitting at neck, a 1/4 in. NPT water intake bung, and a 1/2 in. bung at the bottom for plumbing a line to the radiator
• Rugged 6061-T6 billet aluminum filler necks welded to tank to withstand continuous removal and installation of the cap
• 100% pressure tested to eliminate leaks
• Accepts a standard-size radiator cap

Prop 65 Warning

Product Q&A

Lifetime Replacement

Fits These Cars