Join Date: Jan 2014
Location: Akron, OH
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To the best of my knowledge, the knock sensors cant get contaminated from coolant. And coolant is unlikely to be where they are because if it was, it would be showing up in your oil.
The more likely source of a knock sensor problem is the wiring to the sensor. I have had 3 instances now of rodents chewing on the wiring, causing problems.
Because the wiring for the sensors exits under the intake manifold at the bellhousing side of the engine, it is possible to test the wiring there for signal. A competent tech should be able to do this easily with a scope. Worth the money in diagnostic to know if you need to take the intake off or not.
In 2014 when the van was released, many of us had a warranty cooling loss/smell issue, which was the radiator itself weeping at the passenger side of the core support. This problem was solved with new radiators, and I havent had a problem since.
I do, however, lose coolant slowly on both my vans. Cannot for the life
of me figure out where it’s going. There is some smell, but not much. And I’ve chosen just to keep topping
It up rather than find and fix it.
A growing fleet, you may call me Admiral: 2014 3500 159"extended gas, and a 2014 2500 136" gas