still overheating after radiator replacement, radiator overheating engine temperature Options

[Terzin1]

Hi all

Last week my radiator cracked at the fill neck. I replaced it with another and that seems to have gone in just fine. It holds fluid without leaks. I also picked up a new thermostat but didn't install it yet.

So... today I filled up the radiator with coolant and went for a test drive. It started to overheat again so I stopped, let it cool a bit and opened the cap to fill it and let the bubbles come out as it ran, heat was on. The reservoir was bubbling up too. I also unplugged the fan sensor so that they could run continuously just to be sure that they weren't part of the problem. Well, the fans work and seemed to slow the pace of the temp gauge rising, but I'm still overheating. Tomorrow I'll swap in a new thermostat. What else should I look for if that doesn't solve the problem?

[Terzin1]

Cool Cool. I just took the car out for a spirited 20 minute drive and revved the heck out of the engine. Upwards of 3k rpms sustained. No overheating. I popped the hood and found the fans did kick on and off.

Here's the story as I see it then: I'm thinking the radiator exploded since the thermostat was stuck shut. Now that both are replaced it looks like the system has re-righted itself (crossing fingers).

I have one more question. Because I was constantly replenishing fluids while troubleshooting, the system is probably 75% distilled water, 25% coolant. Will this be extremely bad?