What Should My Temp Gauge Read?

[MorePower7701]

I am having a lot of problems with a brand new Jasper 4.0 ohv engine. I could go on and on about the problems I am having from this engine, but I need to first determine if the engine is running a little to warm. My temp gauge is reading between 1/2 and 3/4, it does not matter if I am going 50mph or sitting in traffic.

 

[Big Jim M]

Sounds about right to me.. You want the coolant temp to be around 205*.
Big Jim

 

[woodyedmiston]

I have a 99 4.0 with manual guages - that means there is a long thermistor wire running to my guage - it is not electric. The thermostat is a stock 160 degree unit. The guage reads just over 190 at running temp most of the time - jumping to about 205 at idle and stop and go traffic. Hope that helps.

These guages are easy to install and will go through one of a couple holes in the dash with a little filing. They screw right into the manifold on the front of the engine. Use a tee if you want to retain the other sending unit. These give you your best read on the actual temp in the engine.

 

[rangerworks]

temp

my gauge has been past the (h)on the factory gauge,but when checked with a temp gun and a aftermarket gauge reads only from 185 to 200,the gauge will mess with your head cause it gets up there