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Adding fuel injection or just adding an electric fan requires the addition of a coolant temp sensor or fan switch. The TR6 thermostat housing is British straight thread pipe rather than the more common US tapered pipe threads used in today's cars. Fortunately British pipe is the same thread pitch as US 3/8" pipe thread, making the conversion pretty easy. Just below the thermostat, the hose nipple on the passenger side was removed. The socket was tapped to US 3/8" pipe and a 3/8" brass street tee (NAPA WH 3750x6) threaded in. The street tee is male on one end, female in the center and female on the other. A ½" hose barb with 3/8" threads (NAPA BK 660-1503) was screwed into one end and the sensor screwed into the center of the tee. A GM style coolant temp sensor (NAPA ECH TS4015) is threaded into the tee and the small coolant hose reconnected. This is another task that can be done prior to the TBI conversion. |
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