ok so im riding and the temp needle keeps going from 1/3 up to 2/3's then back down and up slowly. after it goes up and down a few times it goes up to about 2/3's slowly then rockets up to overheat(on the guage)

because my fans are working i go to the t-stat first. i seems fine but then who can tell by looking?

i put it back together with the suspect t-stat. i then drive to work this morning and no issue.

ijm thinking its the t-stat because it stopped happening after i messed with it.

any ideas. ive already thought of the pump and a clog in the radiator

but what do you guys think?

 

We always see a rash of cooling problems when the temp changes. Your thermostat prob just got stuck. But I would go ahead and put a new one in it anyway.

 

yeah thanks, i was gonna do that. my damn truck is doing the same thing but thats the WP gasket

 

its the T-stat....mine rusted shut once for some strange reason...the only way you can tell for sure dropping it in 190-210 degree water, just replace it, you can also cut the middle out to see if that solves the problem(works when you are broken down on the side of the interstate and dont have a replacement t-stat on hand)

 

i drove it around all day yesterday and it didnt happen again. but i bought ohne anyways

 

heh, keep a ratchet and a 10mm socket w/ extension in your car...I personally hate t-stats and am always tempted to take my perfectly good one out and cut it up...the only reason I dont is I want my heater to warm up faster than it would w/o a t-stat now that I live someplace it sometimes gets cold

 

might have an air pocket, that's why it seems like its running hot then cold

 

i changed it then no over heating all the way up to ceder key. 1.5hrs.

i was thinking about the air cause my overflow was open.

 

it may be the cts sensor in the bottom of your radiator sending your bezel a bad signal...

 

you mean the CLT sensor in the water neck housing I'm assuming?