I lost some coolant in the thermostat install, and looking to refill to the "cold fill line." My surge tank does not label the clear part of the surge tank, but it has this figure, below. I'm assuming the arrow points to the cold fill line, but want to be sure. The manual is unclear on this point. Thanks.
So lemme ask this. Inside the surge tank, there is a raised section on one of the corners of the tank (the passenger side/front of the car corner of the tank). Is the top of that mini-reservoir the same height as cold fill line? If so, much easier to see.
I installed the new thermostat, filled with coolant, drove the car to warm up the coolant, refilled the coolant to the proper level. A year later I was checking the coolant, when I filled it to the proper line I put 36oz of fluid in it. I am not totally sure it was really full when I originally filled it, but it would be worth it to check the level again after a few good drives.
I installed the new thermostat, filled with coolant, drove the car to warm up the coolant, refilled the coolant to the proper level. A year later I was checking the coolant, when I filled it to the proper line I put 36oz of fluid in it. I am not totally sure it was really full when I originally filled it, but it would be worth it to check the level again after a few good drives.
Planning to!
And I did use a flashlight, but my reservoir has "yellowed" and it's not super easy to see the fluid inside. Easier if someone could verify that the cold fill line is basically an extension of that small, inside "reservoir" I mentioned in my original post.
And also, that inside reservoir that I mentioned, what is that little black post/tube that's connected to the small, outside hose? Pressure relief?
Planning to!
And I did use a flashlight, but my reservoir has "yellowed" and it's not super easy to see the fluid inside. Easier if someone could verify that the cold fill line is basically an extension of that small, inside "reservoir" I mentioned in my original post.
And also, that inside reservoir that I mentioned, what is that little black post/tube that's connected to the small, outside hose? Pressure relief?
I had to remove my tank to fix a leak. I took pictures but can't find them. But just like you, I wasn't sure of the fill line. I came to the conclusion that the "platform" you are talking about is the same level as the fill line. If it's not exact, it's so close it literally doesn't matter.
The black tube is a vent I believe. I can't remember but I do know I was confused as to how it could be a vent AND still allow the tank to possible have pressure. I didn't see a valve, but if there was then it would make sense the coolant couldn't flow back into the radiator if there isn't a vent.
"Operating Temp" would mean fully warmed up, I know ours gets above the Full mark when warmed up but GM doesn't say where it should be.
AFAIK, the only standard is the Full mark when the engine is cold.
I check ours after the car sits overnight. I have a 2" mirror on a flex handle and a small but powerful flashlight.
"Operating Temp" would mean fully warmed up, I know ours gets above the Full mark when warmed up but GM doesn't say where it should be.
AFAIK, the only standard is the Full mark when the engine is cold.
I check ours after the car sits overnight. I have a 2" mirror on a flex handle and a small but powerful flashlight.
overnight is the coolant at the tip of the arrow??
^^^
Yes.
In typical GM fashion, P.243 of our 2017 Owner Manual says the level should be "at or above the cold fill line", without saying exactly what that means. The Tech I asked said the cold fill line is at the tip of the hard-to-see arrows, so your pic in post #6 has the color change at the correct level when cold.
^^^
Yes.
In typical GM fashion, P.243 of our 2017 Owner Manual says the level should be "at or above the cold fill line", without saying exactly what that means. The Tech I asked said the cold fill line is at the tip of the hard-to-see arrows, so your pic in post #6 has the color change at the correct level when cold.
