I've already fixed the issue, but the mechanical engineer in me wants an explanation...(also this will be here for people searching
As I would rev up, the temp gauge would read colder. Not just drop off like I expect from the sensor reading air, but just go lower, exactly proportional to rising RPM. Only if I floored it would it drop to the bottom.
I researched on here, everyone with similar symptoms said the infamous BHG, thermostat, or air in the heater core. I was convinced it was BHG, but I replaced the thermostat and ran the car with the front end jacked up real high to burp it. Still the same problems.
So I put some more water in, just to lower the coolant ratio. After that it wasn't as bad, still the same if I floored it but not so noticeable just cruising.
Couple days later on a very hot day coming home from the junkyard, it starts running real hot, but still will cool down if I get on the gas. So I'm flying home, keeping the engine above 4000RPM to keep the temperature in normal range. It starts getting real hot as I pull in at home, I put the fans on it, and for the first time I notice coolant in the engine bay. Upper radiator hose had a little crack in it.
I replaced that, and it fixed it, but why would that cause the temp gauge to read low as the RPM rises? And usually if a radiator hose is cracked, it leaks coolant, but before it started overheating there was never any coolant leakage.
As I would rev up, the temp gauge would read colder. Not just drop off like I expect from the sensor reading air, but just go lower, exactly proportional to rising RPM. Only if I floored it would it drop to the bottom.
I researched on here, everyone with similar symptoms said the infamous BHG, thermostat, or air in the heater core. I was convinced it was BHG, but I replaced the thermostat and ran the car with the front end jacked up real high to burp it. Still the same problems.
So I put some more water in, just to lower the coolant ratio. After that it wasn't as bad, still the same if I floored it but not so noticeable just cruising.
Couple days later on a very hot day coming home from the junkyard, it starts running real hot, but still will cool down if I get on the gas. So I'm flying home, keeping the engine above 4000RPM to keep the temperature in normal range. It starts getting real hot as I pull in at home, I put the fans on it, and for the first time I notice coolant in the engine bay. Upper radiator hose had a little crack in it.
I replaced that, and it fixed it, but why would that cause the temp gauge to read low as the RPM rises? And usually if a radiator hose is cracked, it leaks coolant, but before it started overheating there was never any coolant leakage.
