2007 Hyundai Santa Fe 3.3L V6 P0016 P0300 and cold start rattle due to bad tensioner

My vehicle has had s 3 sec cold start timing chain rattle for about 2 years. Recently the engine light would come on randomly and the car would idle rough, especially in drive or reverse. I checked all sensors and they are fine, no vacuum leaks. Codes seem to point to a stretched timing chain with bad tensioner.

[@breezyacresfarm]

I got it back together. No more codes, runs smooth on idle and no more cold start rattle

[@colincourville1024]

No. I was praying it was a lifter. Please no . Please no!
Ps. Would love to see if you end up pulling the engine or not to replace the tensioner.

[@breezyacresfarm]

I'm also going to check the phaser cam gear to make sure the dowel hasn't broken and shifted the cam off a few degrees. That is also possible

[@danieltoretto4932]

Im in the same boat but i have not seen a kit that comes with the phaser cams…

[@breezyacresfarm]

They have to be purchased separate

[@ralphbellstedt456]

Those tight engine bays are a nightmare.

[@donwest5387]

the chain stretches due to the tensioner?

[@breezyacresfarm]

no, I think it has stretched over the 250000 kms but the tensioner has failed as well.