temp gauge

[superchargedtoy]

I have a 85 toy the 22re was just rebuilt has 380 miles on it the problem is the engine warms up to normal temp then slowly rises to almost the red mark for a few seconds. then it slowly goes back to normal. after that it runs fine the rest of the day, it only does this on the first start up of the day. I thought it was the thermostat so I replaced it but it still does this is this normal. or does anybody know whats rong? The radiator is in good shape so I dont think that is the problem. Any help would be great.

[KToy]

maybe u have a bad temp gauge.... have u had the engine shot at with a temp gun to see what temp really is ?

[fourwd1]

Go here (http://www.4crawler.com/4x4/CheapTricks/index.shtml#Thermostat) and scroll down to the section on engine temp overshoot.

[superchargedtoy]

thanks that web site helped alot I ordered the termostat today. thanks for the help.

[WrenchTwister]

i installed a probe sensor and themistor wire type gauge. I noticed, if the coolant is low, the temp suddenly rises, then as it gets flowing good it goes to normal.
maybe you have an air pocket in the coolant system