Thanks. I was wondering if the chain could be stretched. I hate getting back into it but guess I will. From what i have read crank is TDC then intake is at 2 and Ex. is at 10. Is that correct? its a 2.4. Thanks for the reply
there are a few YT showing how to find tdc if you take the top off and then go for tdc the front right cam closes to the chain is the intake and both lobes will be pointing to the down position and the piston will be at the top. but do some YT to find the procedure. also when and if you take the timing chain cover off look for busted guide parts and if you find any more than likely you will have lots of them stuck in the oil pickup tube. been there found them that requires removing the oil pan. so you need sealer for that or it will leak so if you go that route get some motorcycle case sealer. if you get into this let me know i have all the locations for parts. cloyes has the timing sets for both engine types so make sure you pick the correct one or you will not get the engine to turn over by hand. when you put the timing set in you have to rotate it just to make sure it rotates with out any restrictions the wrong cam phasers will make the valves hit the pistons you will know if that happens.
p0016-17 YT
changing the timing set
this one does not have the variable phasers but the procedure is the same
well tech showing how to figure out the codes
another one showing how to replace the timing set
you do not have to lower the engine it can be done thru the top real easy
another one replacing the timing set from cloyes
https://www.cloyes.com/gm-2-0-2-2-2-4l-timing-replacement-cloyes-9-4201s-9-4202s/
the case sealer this is what i used and it works good Permatex 29132 MotoSeal 1 Ultimate Gasket Maker Grey got it from ebay but any motorcycle plasce will have it don't skimp i did and had to take it off and get this also be careful of the oil dipstick tube that can cause a big leak btdt
this is about all i can send you now watch that one for figuring the codes p0016-17 they show scanning and the results and it was the timing set. good luck