Originally Posted by JustN89
Originally Posted by The Critic
Originally Posted by WobblyElvis
Take it to a dealer and have it documented. Ask them to do a cold start. Hyundai is replacing some short blocks for this very problem.
Should I bother? It is well out of warranty at 113K. The current owner is the second owner and therefore, powerrain warranty expired at 60K. This car is not affected by any engine warranty extension.
Yes, take it in. The warranty is extended to 10 years/120k miles. Make sure they start it cold.
Again, not on this engine. The 10/120K (possibly longer) is on the 2.4 and some 2.0T's.
Originally Posted by Thax
I have noted that in several 2.0L/2.4L MPI engines of that vintage. Mostly in Forte's s, doesnt seem to effect drivability and goes away shortly. I wouldnt say its a normal characteristic but it doesnt surprise me either.
Thank you. The noise on this one is intermittent.
Originally Posted by MichiganMadMan
I had to replace the 2.0 in my sister's 2013 Forte about this time last year. It had a major piston slap in cylinder 3 that was alarming when cold and objectionable when hot. The engine code is G4KA and if you Google it, you'll find a bunch of videos about this issue with the pistons. A lot of them are Russian, so I wonder if it's aggravated by cold weather (my sister lives in MN).
Here is an English one:
https://www.youtube.com/watch?v=CJ0BIcc2lD8
I turned the crank until that piston was at bottom dead center and had a look with a borescope and saw the carnage on the bore walls. There was a core charge, so I didn't completely disassemble the engine.
Russian language videos:
https://www.youtube.com/watch?v=MeUhncD4WhM
https://www.youtube.com/watch?v=etfhtSjAQr0
(FYI the Russian word for piston is "Поршень" if you want to search more)
She bought it as a used car, so it has unknown history before last year. It seemed relatively well cared for (not obvious sludge or varnish in the engine, interior was mint). It seems that one common thread is long highway trips, not sure why. If anyone speaks Russian, it would be interesting if there are any clues in the videos on YouTube.
My guess is that the engine design is sensitive to viscosity, contamination, or both at the piston to cylinder wall interface. It could be that the pistons run unusually hot in this engine design and fuel contamination and the resulting drop in viscosity is enough to start the death spiral of wear. I replaced hers with a low-mile used engine of the same year, run synthetic only, and make sure I have a silicone ADBV. I also make sure that she knows the world will stop if an oil change is missed.
Before I get flamed about the recall on the machining: YES, I know there was a recall for Hyundai/Kia engines for a manufacturing issue. YES, I know they were extending warranties and replacing engines.
It was 100% a top-end, piston noise, not a bottom end bearing as in the recall. This was not covered by any existing recall as far as I can tell. It also had enough miles on it to not qualify for coverage anymore.
Interesting info, thank you. I will pass this info along to the owner.
