Engine Knocking Noise problems of the 2008 Hyundai Sonata

I purchased this vehicle from a small car dealership, when purchased the vehicle had a pretty high mileage however when test drived no service lights came on and the car ran smoothly. After four months of owning the car with only around 2k miles added to it, while I was driving down the freeway a knocking noise suddenly became apparent and the check engine light came on, I pulled over as soon as possible since there was visible smoke coming out of the hood of the vehicle.

This issue effects 2. 4 liter gasoline direct injection engine model Sonatas. Metallic debris may not have been fully removed during manufacturing of the engine crankshaft. If the debris was not completely removed, oil flow may be restricted through the connecting rod bearings, causing connecting rod damage. A worn connecting rod bearing will produce a metallic, cyclic knocking noise from the engine and possible engine failure resulting in the need to rebuild or replace engine. My engine first failed out in October of 2016 and caused me to require an engine replacement. In August 2017 that same engine had the exact same issue happen to it. This has been 2 of the 2. 4 cyl I-4 engines having the exact same issue on the exact same care with around the same mileage on both engines. There have been many various complaints reported all over the internet effecting this engine. Additionally, there is an open recall by Hyundai for the 2011 Hyundai Sonata for the exact same issue because the 2011 Sonata used the exact same engines that are in the 2008 Sonata. . Read more...

Loud knocking sound from under hood. Gets louder as engine heats. Unsafe to drive.

On July 19, 2016 at or about 1500 hours, I was driving to the store to get some food, on the way out my apartment complex, I believe my Hyundai Sonata 2008 allowed me to go about two blocks down from where I live to shut off in the street right before I approached the stop sign. I also remember hearing two weeks prior to my vehicle shut off, while driving I heard this knocking sound in my engine, I thought it was the new starter that was replaced but then a day or two later it stop making that knocking noise. I called around to find answers no one had a clue to what was going on with this vehicle. Everything was working just fine until July 16, 2016. I had this vehicle since April 17, 2009 and I can't not believe this vehicle has a major issue like this at point and time. I could deal with regular maintenance services but on this flip sided coin; not having a vehicle to crank or one that just shuts off with out any engine lights or warning is a complete mystery for me, but I think it is time Hyundai give me some answers to this problem. . . Lets also be clear there was oil and gas in the vehicle at this time of vehicle in motion shut off.

Engine oil evaporated. No leaks or drips. Now motor making a loud banging noise when started. Had it checked by a mechanic he said the engine is shot, needs to be replaced. The bearing is bad on the bottom of the motor and the crank shaft is damaged. Looking on the internet this seems to be a very common problem. Also this is a 4 cylinder motor which in theory should be a less expensive replacement that a 6 cylinder and is not. This is because of supply and demand. These engines blow up is what I was told. It is very common and should be recalled. I see that there is a recall on the 2011 for the same problem. These engines should not blow up.

I read your recall today the same make/model of car that I own. My hyndai Sonata is a 2008. I am experiencing exactly the same issues listed in the recall since the beginning of 2015. I have spent more money than I have trying to fix this car (which I am financing currently). The engine light has been on, there is a knocking noise coming from the engine and the car will not "get up and go" and feels as if it may stall out upon taking off forward after coming to a stop. Loud knocking noise coming from under the hood when you step on the gas. They only way to get rid of the noise is to let off of the gas.

While driving 65 mph on interstate, a began to hear a knocking sound that became louder and louder. I had two mechanics look at my car and both said that the car was about to throw a rod. On December 13, 2014 the car stop running altogether. I had no warnings prior to this happening, and I had regular oil changes. In fact I had the oil changed just two weeks prior to this incident. I am having ricart Hyundai in columbus, ohio (where I purchased the vehicle brand new) look at my car on April 2, 2015. I am interested in what they are going to say or do about this since it is no longer under warranty. I just want them to tell me exactly what happened to this engine and what if anything they (manufacturer) can do about repair. This is my second Sonata (I still have the other car with over 150,000+ miles) and never had any problems like this before. It may be my last Hyundai, if I am not satisfied with results.