Fixing Hyundai 3.3L V6 Timing Chain Tensioner Rattle On Start-Up Part 2 (Explanation of the issue)

[@mifix786]

Update: The car was totaled on 05/2024, the engine was still working solid and smooth even after the accident and the parts held up to the day it was totaled

[@MrAzul73]

To change the timing chains it is necessary to remove the engine or it can be done with the engine in the car?

[@notsofast5495]

If just changing the tensioner will I have to deal with aligning timing marks?

[@Detect-Oregon]

I believe I have this issue, however now it’s constant even after start up? Does this mean my tensioner has completely failed? If it runs and idles still as it should, but now has a loud constant rattle like a lifter. Has the damage been done internally. If I don’t drive it but have it towed before something catastrophic happens could it still be ok replacing and doing all what you talked about on this video? Thx!

[@jeremypilot1015]

as long as the chain has not snapped or stretched enough to allow the valves to contact the piston then you should be okay. If you think the car sounds too awful to drive then definitely have it towed (get triple A and wait a few weeks to call them) When you take it in, they are not going to just replace the tensioner they will do the entire timing chain set along with the guides and tensioners. Sadly, the new ones are not any better than the old ones. however, this is probably a one-time job. Mine started to rattle on startup but goes away after it builds enough oil pressure.

[@jamesplotkin4674]

I will argue it's not a bad design, but bad metal harness which causes the teeth to strip off the tips of the teeth. The ratchet design is to keep the chain tight while oil pressure is developed at startup and takes over the tensioning job. The chain will stretch and the next set of teeth will keep it tight.

[@jessicasanchez6404]

What did u use as a wedge to keep the cams from moving

[@mifix786]

No need for that, I just aliegned the timing marks on the cams and the crankshaft with their respective marks on the chains after I was done changing the tensioners.

[@andyclemente4205]

pretty good video 👍. it helped me understand

[@Mr.mechanic68]

Nice video ❤

[@Oladapofrank]

2009 Hyundai sonata V6 would cut out while being driven and then start back up if restarted almost immediately or after a few minutes. Car engine was cutting out, it would jerk and then a few seconds after the jerk the engine went off like it was shut off by the driver, I'd turn it bank on and it would start back up instantly and still repeat fee minutes after, this happens regardless if i was idling in traffic or just have it on ti warm up in my garage. So i got it scanned and it was a crankshaft code, replaced it and the same issue still persisted, prior to this a mechanic replaced the fuel pump and that wasn't it Scanned it again and then it showed some CAMSHAFT code, i think P0011, they were changed and the random engine cut outs stopped, but this came with new problems, hard starting, and the car hesitated to move when i stepped on the gas, also would shake if in Drive D but in traffic (stationary) shaking would stop if engine ran and engaged in park P or i started to move, also the exhaust was shaking, not violently but it was I took it back home feeling unsatisfied but then the next day i restarted it and it wouldn't start back up, what's weird now is i hear an usual sound while cranking the engine, i see the belts roll the accessories but it won't start up, this sound i speak of is around the head of the engine, i have a 2009 V6 Hyundai sonata, I'd appreciate your advice, I'm thinking the timing chain. now I have just the P0335 code and that's why I'm thinking the timing chain as the car has had the cold start rattle for a while, it's got about 120k miles on it..

[@jeremypilot1015]

Could be. The vibration you described can also be caused by bad transmission fluid. These transmissions are not the greatest. I love my Azera but some of the stuff you find wrong with them is ridiculous.

[@Oladapofrank]

@@jeremypilot1015 thank you jeremy, I visited another mechanic and he checked the all the fuses on after the other, the relays too, and that did the magic, hard start went away, two days now and the engine hasn't cut out, no more sluggish acceleration, I have it's original quick response now, vibration either in drive or park mode is gone and the engine sounds perfect. I'll keep using it all week and then come back here to add any more comments. If it's really the fuses or any of the relays that caused the problems I faced with the vehicle then it means the four mechanics I visited didn't get it, I replaced two sensors, changed fuel pump, one of the mechanics even told me I need to change the whole fuel pump assembly, didn't do that, I just knew that wasn't it. I'll keep using, see how it goes, but so far it's been great and my confidence is getting restored.

[@porter8895]

My 2006 sonata has had this rattle for 4 years, (rattles at startup for 1-2 seconds) about 10,000 miles. Otherwise it runs fine. Is this a critical issue or can the car run forever with this condition? If it will run another 4 years I'd be ok with it. any feedback or experience how long this can go before it grows into a timing belt failure?

[@mifix786]

I wouldn't worry about it, it only lasts for a couple seconds which is too short to cause any significant damage, that car will last you way more than 4 years especially with that kind of mileage, given that you keep up with routine maintenance.

[@liljons6753]

@@mifix786 so have they made better teeths for that part....

[@mifix786]

@@liljons6753 Yes, the tensioner was updated with a better design

[@treatnobleman7609]

@@mifix786 I live in NJ and I saw your part 1 video. I need this done on my 06 Hyundai Sonata 3.3l v6. Can you do it? Do you still live in NJ?