Got a Camry 2005 4 cyl, with 140k miles on it. Seeing blue smoke at cold start lately (not always),…

Got a Camry 2005 4 cyl, with 140k miles on it. Seeing blue smoke at cold start lately (not always), but the car is perfect otherwise. Did the BG EPR/MOA cleaning, and then changed the PCV valve, but the problem is still there. Is it the stem valves? In that case, since it is a very hard DIY, should I sell the car or keep it running for another year or so until it dies on me?

Thanks.

just keep it running, you'd have to really rebuild the engine to fix that and they can still run years that way, being a toyota

false