Noticed a coolant smell on my 2022 HO recently. 24k on the truck. Crawled under to do my oil change and noticed a dried red streak on a few components under the truck. Followed it up and found a small leak at the back of the head. 1/2” drive plug is either not tight or the thread sealant didn’t do its job. I have an appointment this week for them to address it. My coolant is a little low.
Definitely something to check. The plug is almost impossible to see from the ground or above the truck. I was able to reach in the area with my camera and take some blind pictures. (See attached)
Also, another thing to keep in mind is the EGR cooler. You have coolant there at all times. They were, at one time, prone to cracking internally. When this happens you may start to see traces soot in the coolant, or traces of coolant in the oil (or both). A $16 oil analysis will tell you if there is evidence of coolant contamination in the oil, among other things. I would inspect the area around the EGR cooler as often times, if there is an external leak there, it will rapidly dry up because of the hot components in that area. Although you are picking up the smell at the front right corner, it could just be making its way out at that location from the fan spinning and moving air etc.
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