NHTSA Complaint #11477949 — 2013 HYUNDAI SONATA

We were notified that due to a recall Hyundai has they have increased the original engine warranty from the standard 100,000 mile to a 150,000 miles then we were later notified they had increased it to an unlimited mile engine warranty for the original owner. I ask because the engine in my wife's car started "knocking" while we were on the freeway in Medford, Oregon forcing us to stop, we had it towed to the Hyundai dealership in Medford on June 1st . We have made MANY calls and gone by to try and find out the status on our car and have not been told what the problem is, matter of fact we have not received a call back on any of our calls to the dealer. I filed a complaint with Hyundai USA. They talked to me, got the facts and advised they would call me in "3 days". They also missed the return call to us. I responded to Hyundai USA again yesterday and they just called me, when I asked what the status of my car was the person advised me the dealer was going to contact me (this will be the 5th time but it hasn't happened yet) they are waiting for a specialist to come out and identify/evaluate the problem and its cause. I told them "no one" has contacted me with any information on my car since June 1st. The factory warranty is 100,000 on the engine (per the recall extended to lifetime), my car has 87,000 miles on it. The cause should have little to nothing to do with it getting repaired. Its been serviced by Hyundai dealers since we purchased it. The day the engine began knocking the very first thing I did while waiting for the tow truck was pop the hood and check the oil and other fluid levels, i have never had oil consumption issues. All were in the full/normal range. It has been over 2 months without any information on our car. We live in Northern California and the nearest dealer is in Medford Oregon 1 hour away. I have an open claim with HyundaiUSA 20032955, also not responding to my emails.