· Premium Member
First coolant issue at 82k miles. Noticed the sweet smell coming thru the vents. Pop the hood and found a wet spot on top of the transmission housing directly below the tank. Noticed a droplet hanging from the tank close to that hose. Replaced with a Dorman, pretty cheap and easy. Hardest part was removing the shield to drain the coolant first. Reused the hoses, looked good.
I used a Dorman as well. The added metal support in the inlet is good. But also, the pressure cap relief "channel" drips out on top of the tank when the o ring fails or has excess pressure. Allows a visual.
The acdelco tank channel extends across the top, down the side to the bottom edge of tank on the outside bay side. Could explain many "coolant loss without visible leak" complaints.