Engine Dehydrator Plans

Commercial engine dehydrators are available with various features, including self-recharging silica, and typically cost around $1,200. Considering the price range of $50k-$100k for an engine, this cost is relatively minor.

An alternative approach involves purchasing a larger quantity of silica gel than needed, allowing for the silica to be swapped out when it requires recharging. The used silica can be taken home, baked, and reused for subsequent cycles. This method costs approximately $100.

The engine dehydrator can be assembled in under an hour, though sourcing the parts may take longer than the assembly itself. The mechanism is straightforward. See Figure 1 and the design in Figure 2 for reference.

The required parts include airtight containers, one of which should be large enough to accommodate the air pump. The link below will give the complete assembly instructions.

I promised Erik to include this info in the last two newsletters…Here it is, finally. I’ve just included the intro and the link to simplify access.

https://eaa430.org/wp-content/uploads/2025/07/diy-engine-dehydrator-compressed.pdf