Post by
Skibane »
https://forums.nicoclub.com/skibane-u40096.html
Sat Dec 27, 2008 11:05 pm
I have no specific info on factory-installed block heaters for Q45s, but...
One of the more popular locations for factory-installed heaters on American vehicles is freeze plugs - Basically, the standard freeze plug is replaced with a plug that has a built-in heating element. Biggest disadvantage is the limited wattage - The small size of the freeze plug limits the size (and heat output) of the heating element.
On the aftermarket, tank-type heaters are popular. These are typically installed in the bottom radiator hose (although some versions can be plumbed into the heater core hose). Sizes up to 1500 watts are commonly available.
Oil dipstick heaters are also available for some vehicles. They replace the existing dipstick with a version equipped with a built-in heating element. Obviously, the heating ability is limited by the small size of the dipstick.
AFAIK, nobody makes a heater that is specifically designed for automatic transmissions. However, several companies make magnetic-mount heaters (example here) that can be slapped on the bottom of a steel ATF sump pan (if you don't mind the resulting reduced ground clearance).