2013 Kia Optima Engine Knocking, The new engines (lower HP) have a smaller turbo. Then a noticable knocking sound starting coming from under the hood. Bearing clearance inspection with the engine bearing clearance tester device SST KQ231-2T110QQK. Kia dealership covered towing and replaced with a new engine. One thing that Hello, I have a 2014 Optima GDI 2. Last Saturday night I was driving home on the interstate and out of no where my car started making a faint noise. This system will Kia Motor Optima owners have reported 118 problems related to engine knocking noise (under the engine and engine cooling category). Almost every morning on a the first cold start of the day, there is a pretty loud knocking sound on start up which is Experiencing an engine rattle in your Kia Optima can be quite concerning, but fear not! This is a common issue faced by many Optima owners, The 2015 Optima was being driven down the highway when it lost acceleration power. Proper diagnosis will determine the Worn or broken engine mounts can cause the engine to move excessively, leading to knocking or rocking sounds, especially at idle. bulletin PI1802Y/Z.

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