Join Date: Oct 2011
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3.5l Overheated now knock/tick
My 2009 Challenger with the 3.5L overheated on me last night and now I have a horrible knock/tick.
I had noticed that it got hot a day before so I was watching the gauge like a hawk. Last night it was staying steady in the middle.
I was on the highway for about 2 minutes and noted the motor started to sound abnormal. I pulled over to the side of the road and found that the reservoir tank was bubbling over like mad. The gauge was still at half way so I suspect that there was an air pocket in the cooling system where the sensor was or the thermostat is stuck closed.
I did not suspect it to overheat on the highway since it was only 7 Celsius here plus with the highway speed air flow going through the rad.
The car is new to me so I have no history. It has 49 thousand miles on it.
I let it cool down and the oil still looks clean as does the coolant and they are not milky. I started the car again and it has a horrible tick/knock.
I have attempted to attach a video of the horrible sound.
My cousin was thinking the sound might due to the coolant channels being empty and possibly the knock sensors?????
I am planning on replacing the thermostat for sure. Just wondering if anyone thinks this is the issue or do I have bigger issues and I should start by removing the head, not the thermostat?
I am thinking that I have bigger issues and its time to start at the head.... Although I don't have much to loose with doing the thermostat and making sure the system is full off coolant again.
What do you guys think? Please let me know.