Hyundai Sonata Problem Report
Hyundai Sonata Noise on Startup Due to Failing Timing Chain Tensioner
If you experience excessive engine noise on startup (after the engine has been turned off for several hours) that lasts for more than five or six seconds, turn off the engine and check that the engine oil level is correct. If the oil level is correct, the noise may be caused by the timing chain tensioner. Hyundai has an improved tensioner to correct this problem.
This strange noisy gremlin began in April of 2013. At first it would not happen every time on start up
(after sitting overnight) and was initially 2 seconds. By August the rattling noise was happening more
regularly on start up.........and slightly longer in duration........but never after restarting a warm engine. In April I spoke to a Hyundai service manager who informed the timing chain tensioner was known for creating this problem and Hyundai redesigned the part. In August I spoke to the same person and he volunteered the following information. I found it hard to believe he claimed he NEVER replaced timing chain tensioners, unless it was to correct work done by the "corner repair shops", implying they screwed things up. Specifically, he said do not be concerned with a 2, 4 or 6 second rattle upon start up. Really? I am a perfectionist and expect a manufacturer to do the right thing, i.e., make a GOOD CAR and/or replace defective parts. We were the second owner and got shafted by Hyundai's self serving limited warranty of 5 yrs/60,000. Of course what good is any warranty (new or used) if the dealer gives you the runaround. This service manager claimed there is not need to be concerned unless the chain rattles for 90 seconds on start up, or rattles once again after the car is restarted after 10 minutes of sitting. Additionally, when asked about worst case scenario he said the CHECK ENGINE will come on at the point the issue is preventing the car from running properly. This will most likely be our FIRST and LAST Hyundai product. Although they are not the first to dump a poorly designed product on hapless consumers, I desire a car maker who owns-up and makes things right. While some so-called mechanics theorize this problem arises from pool maintenance (infrequent oil changes) the fact remains the part was REDESIGNED, which clearly implies otherwise. - Visitor
Timing chain tensioner noise since 20k miles, took in dealer said 'normal'. Now it is much worse, taking it back and going to insist on the tensioner being replaced under my extended warranty. Is there any TSB number or document I can print out for the dealer to deflect the standard 'I don't want to do it' crap? - Visitor
knocking sound on engine area, sounds like tming chain of lifters. - Visitor
Our 2006 Sonata with 3.3 L engine has been makiing this noise for over a year. Was told last year that it had to make the noise for longer than 15 seconds before they fixed it. Did my own oil change last fall and found a lot shiny metal particals in drain pan. Mentioned this to dealer in December and was told the same thing as last year. Contacted Hyundai direct and was told it should be fixed as it is "under warranty". Taking it to dealer this Thursday (1/24) for them to check it out. We'll see what they say then. - Visitor
Timing belt tensor broke and caused damage - Visitor
Hyundai has a long powertrain warranty but the factory does not want to pay for anything unless it's actually broken. I worked for Hyundai as a tech for some time only because the GM dealership I worked for also sold them. What I used to do was to just break the part once I removed it from the vehicle and come up with a huge CCC (Complaint, Cause, Correction) report so the shop would be covered and the customer would be covered. Unfortunately I usually had to do this without my manager knowing because they for could care less if the customer was happy because the more money they save the factory in warranty the more perks and deals the dealership gets and the more the service manager would make. This goes for every manufacturer by the way. Also, Hyundai HATES to give loaner cars. After I stopped working at that dealer we had bought a new Tiburon that needed a new RR wheel bearing, a non stocking item in the parts department. I had notified them ahead of time and let them know I'm a certified tech, the service manager assured me they would have it there, it only takes MAYBE an hour to change. Well they didn't order it and not only that but the tech comes back and says he doesn't hear a noise it's fine... I was like, Wrong guy to do this to pal, did you by chance put it in the air and check the play? So it goes back in then comes the battle for a loaner since they didn't order the part the car had to stay at least three days and it was a Friday. I did get the loaner but since the dealer didn't have loaners because it is solely a Hyundai dealer they had to rent us a car. Bottom line is you need to find a good tech who doesn't just care about his pocket (warranty time sucks and we lose money compared to customer pay) and wants to make sure the customer is happy. A REAL good guy would even bring the car to the detail bay so it's nice and clean when it's picked up. If the service writer won't fix it ask around to find out what dealership is helpful to it's customers. If need be get your regular mechanic to diagnose it with a tensioner problem and have them print up the TSB (Technical Service Bulletin) that explains the hydraulic tensioner issue. Good Luck... I'm going to go through it myself with my girlfriends Santa Fe. - Al Mag
Timing Chain Tensioner making noise at start up, was told by Hyundai Dealer shop to change from recommended 5w20 oil to 10w30. I will try this but do not think that it will fix the problem. - bamaloaf
I purchased a used 2006 Sonata 2 years ago. It has been a great car until recently. For some reason it has started to occasionally make a rattling sound when I start it. The sound is coming from the area where the belts are located. I have read that other owners have traced the problem to the timing chain tensioners. I have called the local dealer service department but they are not very familiar with this being a problem. :( Scared to find out what they will charge to fix the problem... - Visitor
mine is doing the same thing aqnd its going to cost me 1200 dollars - fitter669
Rattle for about 10 seconds after cold sturt up and every start after sitting for 10 minutes or long. - drago2
Rattling noise, on start up. - Visitor
Engine "Ticking" Sound - Visitor
I just bought this car a month ago and it raddles every time I start it up! ugh I have to now spend MORE money - Visitor
Engine is now Blown in Service!! Hyundia says they never had a problem with this!! - Visitor
but I haven't seen anyone say they can stop the noise by jiggling the key - Visitor
Still working on it - Visitor
excessive engine noise on startup - Visitor
I just bought thus car and briefly hear upon start up noise sounding like lifter noise but now after reading I know its the timing chain tensioner - Visitor
It is a loud ticking sound which gets worse upon acceleration. Not every start though becoming more frequent and is being towed to the repair shop tomorrow morning. I am not pleased at all with this vehicle as I bought it used only a yr and a half ago and has already had to be serviced multiple times for major problems. - Visitor
Ok this sonata is on its second motor replace by bob king in ws nc and for two days I hear a clanking sound when first start up now the next day motor locked up sitting in da drive way this motor went out about da same mileage I didnt know about this timming chain tensioner and oilpump until I came here and it seems like theres a problem with these motors and no major recalls and some people pay for repairs thats under warranty if the dealership didnt change the oil and oil is the least thing for this cause its defective parts by design but the game is did u have ur car dealership kept up with oil changes and service well I had my black book we'll see if and wen they replace dis motor - Visitor
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