I just got a 95 Ram over the weekend. I noticed the temp goes up and down from 210 to 250.

At work it overheated and i had a big leak from my radiator.
I installed a new radiator, and then took it for a test drive. It climbed up to 250 stayed there a sec...and then settled down for the rest of the drive ( about 5 minutes) at 210.

Do i need to replace my thermostat? Should i be worried about something bigger?

Thanks )

 

Could be sticking thermostat. Theyre only a couple of bucks and not hard to change so it's not gonna hurt. did you make sure to burp the system good?

 

sounds like t-stat. you can check it by takin it out and stickin it in hot water, and see if it opens, r just buy a new one, like 5 bucks

 

I would replace it, its fairly easy to do, btw DO NOT buy a fail safe t-state they are total junk...

 

Probably still low on coolant.....

 

Check this and burp the system really good. Air pockets will do that.

 

Just curious, but why don't you like fail safe stats?

 

Can you please explain to me what you mean by burp the system? Sounds like you mean bleeding it which Im not sure how to do.

Thanks for all the answers..ill do the T-stat tomorrow.

 

Uncap your radiator when your truck is cold and start her up. As the engine warms up the t-stat will open and circulate coolant. Since the cap is off the air will escape. It works better if you can get the right side of the truck higher in the air.

Anyway, once you quit hearing it "burp" replace the cap and you're good to go.

 

What color is the truck?