These two Bank 2 Cam/Crank correlation codes seems to be returning in various forms(active, pending, history). I found evidence of sludge on that bank just from peeking inside the valve cover. In order to fully inspect the VVT Oil Control Solenoid’s some decent disassembly is needed.
My question is this, should I be concerned about a mechanical timing issue(jumped chain Etc...) or could these codes just be a result of the sludge? How would you go about diagnostics? Would you tear down everything and inspect the soleniods right away or do some other tests first?
I would start by checking oil level and condition I don’t think I’d consider jump time as of now I would follow what service info states for these codes I would probably rec oil change maybe with a flush detergent and quality filter clear codes and see if they return before disassembly if I can remove an actuator to test on bench and see visually I would
Thanks Justin, yea man sorry I forgot to mention I did the flush and cleared codes already. Guess I was thinking should I go through the trouble of comparing scope patterns or just dig in?
Before an extensive tear down you should check cam/crank correlation on both banks with a lab scope. The real issue would be finding what a known good looks like... One would think this should be included in service information by now for all makes. It certainly would make diagnosing cars much easier.
Definitely scope out cam/crank correlation first, it’s the quickest way to tell if a chain has jumped or if there is a trigger problem and if you can’t find known good then in cylinder compression waveforms comes in real handy. There is a pressure waveform overlay program on google play that helps with that. All makes and models have service information on valve timing degrees and so you should…
Relative compression test with a synch, should rule out jumped cams. Also look in the data list for desired and actual cam positions, before using the scope.
I didn't see where you listed mileage, but make sure of oil pressure before selling anything as complicated as chains and phasers only to find out when engine warms, oil pressure drops and cam movements don't respond.
See these codes all the time in the hyundai 4cyl almost always oil level or oil quality related
Yes, you should be concerned about mechanical timing. That engine had timing chain rattle issues on start up due to faulty tensioners that may have stretched the chain, or caused CVVT's to shear dowel pins from the camshafts. I believe there are several TSB's about this. I know Kia has several. There is not likely any cheap way out of this.
Thanks everyone you saved me from tearing off the intake and valve cover. Honestly, I was thinking I should scope from the gate but I’m not so familiar with interpreting scope patterns and mentally somewhat intimidated by them. So I needed a push from you guys. It was pretty easy to get the data the pcm sits in the engine bay right by the air cleaner. From the patterns it seems that Bank 2…