Actually if you get a trapped steam pocket right on the thermostat it will raise that fast.Mckenzie93 said:But unless you have no oil or no antifreeze in your block, there is no way the engine can get that hot that fast. Try and bang around on the top of the guage cluster or the dash and see if it moves around att all. Try slamming the hood, seeing if it jumps. Check your antifreeze levels, and your overflow tank to make sure its not boiling over. Any more Q?s just post.