Work In Progress..
- '18 CX-9 Signature
I posted something on another forum.. They said its a coolant leak. Likely head gasket. Its definitely not normal for the coolant to go down to the Low mark in just 60,000 kms. I’m worried this could be problematic down the road as I didn’t purchase extended warranty and plan on keeping this vehicle for 5 more years. Never thought I might be one of the “few” with coolant loss. This is a downer. I’ll fill it up to under the High mark on a cold engine and observe.
Reposting what @PTguy wrote earlier:
The coolant level in the plastic expansion tank directly relates to the coolant temperature. The coolant temperature relates to both the load on the engine and the heat of the day. You want it above L when everything is cold, and you want it up to F after working hard on a hot day. The actual level isn't as important as having a consistent level at a consistent temperature.
I'd just fill it to the middle one a cold engine (or maybe an inch or two below the fill line) to account for expansion. But as @PTguy mentioned, "the actual level isn't as important as having a consistent level at a consistent temp".