Radiator broken or just really hot weather?
So for the last few days, the temp gauge has been jumping from 90 to 100-105 during the afternoon commute. Especially when it's stop and go traffic. The max temp is 125.
At first I thought it was due to the really hot weather, but am seeing similar behaviour during idle at a parking lot in the evening around 8pm ish.
It only cools back down to 90 when I'm getting good speed like 70 km/h+.
I've also noticed the occasional hissing while driving.
Is this a radiator issue? Or is it just because it's so hot out?
Should I take it to the shop asap?
Note: it's a 2004 pontiac sunfire
At first I thought it was due to the really hot weather, but am seeing similar behaviour during idle at a parking lot in the evening around 8pm ish.
It only cools back down to 90 when I'm getting good speed like 70 km/h+.
I've also noticed the occasional hissing while driving.
Is this a radiator issue? Or is it just because it's so hot out?
Should I take it to the shop asap?
Note: it's a 2004 pontiac sunfire