Ross, et al.
To satisfy myself as to the accuracy of the VDO water temperature gauge
in my 4.0 Plus 8, I had the water temperature measured at the top and bottom
of the radiator near the location of both sensors, i.e. that for the fan,
and that
for the gauge, with a Raytek infrared gun. The fan kicks in for a few seconds
whenever the gauge reads ~ 99 - 102 C. The actual water temp at the return
elbow is 93 C. +/- 1. At the same time, the temperature at the top of the
radiator is ~ 88 C. So... the VDO is most likely reading 12 - 14 C higher
than actual water temperature. I know this info will come as a relief to many
of you. It may also apply to owners of 3.9's since I believe the thermostat
housings are the same, but you will need to check the VDO part numbers
for the 3.9 and 4.0 to see if they are the same.
Regards,
Willie
Land Rover Specialist
NAS 4.0 Litre Plus 8 (R-11953)
MSCC # 9096, Morgan 3/4 Owners Group
|