3.5l Overheated now knock/tick - Dodge Challenger Forum: Challenger & SRT8 Forums
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Old 11-07-2011, 07:35 AM
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3.5l Overheated now knock/tick

Hi There,

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.

Thanks!
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Old 11-07-2011, 07:36 AM
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odds are you spun a rod bearing - NOT GOOD
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Old 11-07-2011, 09:06 AM
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Old 11-07-2011, 10:47 AM
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Take it to the dealer... should be still under warranty, shouldn't it?

Mike
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Old 11-07-2011, 01:07 PM
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It was a salvage so no warranty.....
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Old 11-07-2011, 01:12 PM
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ooooooooh - got some bad news homey - if that knock is a rod - that engine is a boat anchor or an EXPENSIVE fix - sorry
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Old 11-07-2011, 01:34 PM
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Wouldn't I loose oil pressure and then have a trouble code on the dash? Nothing has come up...?
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Old 11-07-2011, 03:11 PM
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Oh damn... well guess the warranty is outta play. You still may take it to the dealer and let them diagnose it, but not do any repairs...

I agree with Ghost.. if you threw a rod, or spun a bearing, that's gonna be expensive. I don't know with a spun bearing that you'd have the codes and low oil pressure. I also do not think replacing your thermostat is gonna fix the problem.

Mike
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Old 11-07-2011, 05:28 PM
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Originally Posted by GHOSTDANCE View Post
ooooooooh - got some bad news homey - if that knock is a rod - that engine is a boat anchor or an EXPENSIVE fix - sorry
That is not an exspensive as you would think. You can get a replacement for under $1K. 3.5l are readily available.
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