who's installed one?

where is the sending unit located on the 3.0?

did disconnecting the factory guage sending unit have any effect on the ecm, or is there a seperate sensor for that?

My factory temp guage bounces around like crazy, and i would rather know the exact water temp anyway.

 

you've got problems.the guage sending unit is very small(about 1/8th pipe)the aftermarket guage is too big for the hole.there are holes big enough for af/mark but they controll something important.Anyway it sounds like a simple elec prob to me.check some connectors;and grounds.

 

It was easy--sort of. The temp sender is at the firewall right in the middle of the engine. I bought a Sunpro mechanical guage with the metric adapter kit.
Just took the old one out, put some teflon tape on the adapter and sending unit and tightened it up. I mounted the guage over the old bouncing all over the place guage.

Here is a bad pic-

 

The sending unit is located at the rear of the engine, behind the upper air intake, in the water bypass block and is a PITA to get to. Some aftermarket units will work in the hole but will usuallt require an adaptor from the BPT to the NPT 1/8 threads. I found it easier to drill and tap a hole in the upper water outlet, where the upper radiator hose connects to the engine to fit the aftermarket sending unit. The Autometer sending unit is a small 1/8 unit!! That way you have no worries!!