# Overheating? **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [March 24, 2009, 1:36am UTC](https://community.cartalk.com/t/overheating/28228 "2009-03-24T01:36:38Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![nutcase22](https://avatars.discourse-cdn.com/v4/letter/n/b5ac83/32.png) [@nutcase22](https://community.cartalk.com/u/nutcase22)\ **Post date:** [March 24, 2009, 1:36am UTC](https://community.cartalk.com/t/overheating/28228/1 "2009-03-24T01:36:38Z")
95’ chevy 4x4 5.7 my mechanic put a new water pump in & thermostat, the next day the coolant temp gage near pegged out & then came down.I took it back & they said the thermostat was ok but the radiator was clogged so, how much? I asked. $500.00 ouch! I think I’ll just take the truck. Well I didn’t check the radiator & just put a new one in myself. Turns out the rad wasn’t clogged so now I have a back up rad. Start the trck & temp gauge goes almost all the way up then comes down rev the engine to 2K rpm’s and up she goes & I can also here gurgling in the heater core, I also flushed everything & back flushed. I ended up pulling the thermostat so I don’t have to deal with the temp gauge. This happened once before. I mean before the water pump & thermostat was changed. I’m done can’t figure this one out. Any suggestions? ---
**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\ **Post date:** [March 24, 2009, 2:51am UTC](https://community.cartalk.com/t/overheating/28228/2 "2009-03-24T02:51:36Z")
I trust you put the t-stat back in. You don’t want to run it without one. It is a 190 deg. right? Gurgling noises in the heater core usually means there is air in the system. When the temp gauge pegs, is the engine actually over-heating? You can use a test rad cap that comes with a thermometer to check for the coolant temp. You said the rad wasn’t plugged after all. Too bad you hadn’t checked it first. Throwing parts at a problem seldom work out. I think you MAY have a coolant temp sensor fault. When you replaced the rad, did you also replace the rad cap with a new one of the proper pressure rating? ---
**Author:** ![nutcase22](https://avatars.discourse-cdn.com/v4/letter/n/b5ac83/32.png) [@nutcase22](https://community.cartalk.com/u/nutcase22)\ **Post date:** [March 24, 2009, 5:00am UTC](https://community.cartalk.com/t/overheating/28228/3 "2009-03-24T05:00:05Z")
Changed the temp sensor but not the rad cap. ---
**Author:** ![nutcase22](https://avatars.discourse-cdn.com/v4/letter/n/b5ac83/32.png) [@nutcase22](https://community.cartalk.com/u/nutcase22)\ **Post date:** [March 24, 2009, 5:07am UTC](https://community.cartalk.com/t/overheating/28228/4 "2009-03-24T05:07:10Z")
Yeh throwing parts at a problem seldom works good thing I didn’t give that guy $500 to put that rad in.& why can’t you run without the thermostat?