Question about 2004 Kia Optima

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Kia optima LX 2004 shut down at about 50mph

The car just shut down and lost compression, Two weeks prior a mechanic had replaced the crank position sensor and the timing belt.The vehicle temp gauge did not show any sign of overheating nor did I smell anything. I had it towed back to the mechanic and he states that the thermostat probably locked up and caused overheating hence blowing the head gasket. To note when I saw the newly installed timing belt it had notches on it every three inches or so along the entire length. I don't believe this guy and I think he is trying to lead me into believing his prior work only two weeks ago did not have anything to do with this.Please help Thanks

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Was it the timing belt or the serpentine belt that was replaced (not the same item). It's possible the previous service may have had something ot do with your current problem but I'ts impossible to tell from here. I was once a professional warranty inspector and even hands-on with your vehicle it would be difficult to draw any connection between the two failures. If you do not trust the shop or technician that works on your car, don't use that shop. Trust and confidence is important but must be earned.

Posted on Apr 21, 2009

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1 Answer

2004 kia optima


Try the ignition switch,

For the Crank sensor there is a small metal disc that mounts behind the sensor if that is cracked or dammaged or installed backwards you will get same results as if it wasn't Make sure the timing marks line up on your timing belt. www.kiatechinfo.com

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2 Answers

Kia Optima 2004


This could be multiple issues.
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Check these let me know.

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