Ive searched with no luck on a write up to changing 4 banger thermostat. ONe more thing why cant i search just ranger forum, even if i go advanced and select it, the search engine shows all ford forums which is to much to siphon through.

Need write up on changing thermostat, im thinking someone has pulled mine out b/c its stays at bottom of the NORMAL mark.

Could low temp cause rough idle?

 

Go to Autozone web site for directions on changing your thermostat.

 

My temp gauge stays at the bottom of the dial also, and I was told by the original owner that it has a 195 degree thermostat in it. So I don't worry about it. I am sure if I drive it this summer it will go higher than the bottom 25% of the gauge.

 

If it is a 195* thermostat, it should be at 195* all the time, summer or winter. jd
The thermostat is located in the housing in which the upper radiator hose is attached. Remove the coolant from the system.
Remove the upper radiator hose.
Remove the heater hose from the housing.
Remove two 10mm bolts holding the housing to the block. I use a 1/4 drive and sockets as one of the bolts is at an angle, but you can get it.
Remove the housing and thermostat.
Some of the housings are prone to rust out. Examine yours and replace if necessary.
If not, clean both surfaces, block and housing.
(I use this time to flush the system with a garden hose. Take the bottom radiator hose off, and flush the block and radiator.)
Use sealant on the gasket, and re-assemble in the reverse order of which you took it off.
When re-filling with coolant you will need to "burp" the system.
Fill the radiator with coolant. Leave the cap off and start the engine.
Watch the coolant level, and when the engine warms to the opening temperature of the thermostat, you will see the water level in the radiator drop. Stop the engine, and refill to the top with coolant.
You should now be good to go, but drive around some and watch the temp. If it gets a little warm, add more coolant. You probably won't have to do this if you "burped" it correctly. jd
Re

 

Too low of an engine temperature can cuase rough idling or a high idle. The ECM uses temperature for setting idle speed. Low temperature indicates to the engine that it is cold and the ECM uses the temperature as a choke to heat the engine to normal operating temperatures for efficiency. This could affect emissions since O2, then temperature, are the first and second in the priority of input signals followed by MAC, etc. for emissions control and economy.

 

What degree thermostat is called for on my truck, went to get one and auto zone had 3 different listing for temps. Whats the stock Temp?

 

192 degrees to 195 degrees

 

thx they listed 195 but also carried 160 and 180 so wanted to double check.

Thx wtroger