
Originally Posted by
J57ltr
It should run dead center in the middle of the gauge. If you aren't using the AC and in standing traffic it will get 1-2 tick marks above middle and should cycle back and forth. With the AC and fans on it should stay just a mark below the middle. But scanning is best as Bill said. I'm using a BAFX its $25 bucks and the Torque Pro is $5, but for just doing coolant temp you can just use the free version. There are cheaper ones out there, but bought one and it didn't work on GM cars. I spoke with a few guys at BAFX and they stand by their product. Some have had good luck with others, but it seems like a crapshoot at least the BAFX guys are in the U.S. and they will support it.
also make sure your overflow bottle is filled properly and that the hose isn't leaking. If you get any air out of the system make sure to keep an eye on the coolant level in the overflow.
Jeff