I have recently rebuilt my uim and LIM. I may have done something wrong so I appriciate any advice.
Full disclosure, the PO had put in stop leak.
After repalcing the UIM and LIM I ran water through the system several times and ran the engine w/o the thermostat to flush everyhting out.
I drained and added 2 gallons of coolant
I took the car for a spin, and she'* overheating to the point the idiot light comes on.
Taking a sample of the coolant, it should have been near the middle shows the needle pegged to the top. Runs normal temperature w/o the cap on and noticing the coolant is "boiling" even when the temperature reads 190-200 and the fans kick on.
It'* like there'* an area in the engine that still has 100% water, wand is boiling over, causing steam and airpockets. That'* my only explanation why the coolant is reading so high.