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Chevy HHR Network (https://www.chevyhhr.net/forums/)
-   Problems/Service/Repairs (https://www.chevyhhr.net/forums/problems-service-repairs-42/)
-   -   Coolant Temps Bouncing all over (https://www.chevyhhr.net/forums/problems-service-repairs-42/coolant-temps-bouncing-all-over-60569/)

tiapetra 08-26-2018 04:49 AM
Originally Posted by Cliffs51 (Post 850848)

On my 07 2.4 I was seeing temps between 204 and 210 at long red lights. The coolant had been changed right before I bought it in June. I added the coolant enhancer in the picture and now at a long light it stays at 196 to 198. My ac is always on here in Florida too. Ive got no interest in this company but it really works for me.
There are several products out there like that, another is WaterWetter, they are surfactants.
Antifreezes all have a bit in them too, but not very much.

tiapetra 08-26-2018 04:52 AM
Originally Posted by gio89kid (Post 850880)
Did you replace the thermostat?
There is a lot of fluid that doesn’t drain out unless you remove the thermostat.

Which may explain why you noticed an improvement, but also why it is not completely fixed. You may have just mixed some new fluid with the old.
You have to remove the drain bolt from the bottom of the water pump to get all the coolant out of the block.
Doable from the top, but easiest to remove the filter box and the box rear mounts to reach under there.


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