See air distributor box restoration post. Now that the heater and fan are temporarily installed, we can test the air flow into the plenum and out through the air distributor box and demisters. Bruce Murray, who installed his new heater a few weeks ago, was the first to discover that......
After installing the heater casing, the next step was wiring up the motor and electronic control module. The electronic control box, potentially sensitive to heat, was tucked away under the passenger dash. A Molex connector joined the harness to the fan motor, which passes through the dip switch firewall hole,......
See also heater upgrade part 1, part 2, part 3, part 4 and the valve mount. The last construction task involving the heater casing itself is setting the proper flap angle and rotation. The green flap above is the hot-cold control; if vertical, the flap forces air through the heater......
See also heater upgrade part 1, part 2, part 3, and the 3D printed valve mount. The OEM water valve is another vulnerable point in the problematical Jaguar heater system. The Four Seasons 74000 replacement valve should make a significant difference in the flow of heated coolant (but it works......
See also heater upgrade part 1, part 2, and the 3D printed valve mount. The heater upgrade includes a more powerful motor with a choke, a new squirrel cage fan, and an electronic control module to control motor speeds and performance. The fan motor replaces the prior unit, but the......
As part of the heater modification, the Jaguar OEM valve will be replaced with a new Four Seasons 74000, a readily available black plastic unit. The new valve requires a different mount, and this presented an opportunity to design something using OnShape and then physically manufacture it using 3D printing......
