Originally Posted by Austin91rx7
OK, I just went out and filled the radiator with coolant and started the engine with the cap off. The coolant has a steady bubble when the car is running. When I hit the throttle the coolant is sucked down into the radiator and then comes back up and spills over.
Is it safe to say that I overheated the car and the o-rings are bad? If this is the case I have absolutely no idea what the car would be worth now.
Total bummer as it was probably ignorance that overheated the engine in the first place.
Any feedback would be most appreciated.
When you increase throttle the coolant will suck down because the water pump is sucking harder it will then overflow when you let off, that is normal, let the engine warm up then the thermostat will open, then the engine will fill with the fluid, then you can fill the radiator completly up, only then is your car completly full of fluid, at that point you shouldn't open your cap because it will leak, when filling you can even have someone hold the throttle down a little to suck the fluid down and you can fill up, replace the cap before they let off the pedal though, that is usually what i do when I fill my radiator to ensure there is enouch fluid, any excess will push into the overflow bottle, just make sure that isn't to full and you should be good.
Now I am new to rx7's but this is just general automotive here, the way I have filled every other radiator in the past.
If you do have an oring problem I would assume you would smell the antifreeze burning, it would be a very strong sweet smell.