Coolant Temps Bouncing all over
07-11-2018, 06:25 PM
#12
Technical Moderator
Join Date: 01-23-2009
Location: Fredericksburg, Virginia
Posts: 24,688
Not necessarily at high mileage, but impellers have been known to stop spinning for various reasons. Chain, bearing, impeller etc. The weep hole being on top in a hole doesn't help you noticing a bad bearing, like you used to be able to do. Plus the impeller is just a force fit onto the shaft.
07-11-2018, 10:04 PM
#13
Senior Member
Join Date: 04-07-2014
Location: San Diego
Posts: 505
Really, hmm. Mine does the same thing, but only on hot days and after driving it hard up a long hill.
I changed the coolant and thermostat and it stays 178-190 all the time except on really hot days where it does what this person is experiencing.
I know I did not add enough water to my coolant mix so I will be replacing it again soon.
If it was the pump would’t It fail to go back down in temperature at a stop?
I changed the coolant and thermostat and it stays 178-190 all the time except on really hot days where it does what this person is experiencing.
I know I did not add enough water to my coolant mix so I will be replacing it again soon.
If it was the pump would’t It fail to go back down in temperature at a stop?
07-11-2018, 11:18 PM
#15
Member
Thread Starter
Join Date: 01-22-2011
Location: Tallahassee, FL
Posts: 45
Mostly just in stopped or stop & go traffic. I ordered a new radiator and thermostat and will change out the fluid. I need to get this corrected since this is my work car that I drive all day.
07-12-2018, 05:42 AM
#18
Senior Member
Join Date: 03-06-2010
Location: Ohio
Posts: 6,869
Don't use anything but the proper AC-Delco thermostat and Dexcool... You don't want to have to do this twice.
