Thermostat Housing (James – 06)

Since our conversions use an electric fan, I like to use the fan switch from a 1989-90 240SX. It has a built-in fan switch in the lower radiator hose as you can see in this image:

Quick note: It is actually cheaper to buy the entire hose assembly (which comes with the switch!) than it is to just the fan switch! Just go to your local Nissan dealer and order part number 21503-40F65. Wholesale cost is about $25!

If you take the hoses off, it looks like this:

On our conversions, we don’t actually use the metal hose section (we just use the switch). Ace lathe-man Eric got busy on the lathe and built a little bung that will be welded into the lower water outlet right next to the thermostat housing.

Here is what the lower water neck looks like when it is done (this shot is on my car):