A way to mitigate against this sort of problem is 'give and take' I've been successful with this strategy many times. People are more amenable to your suggestions and criticisms when it's two way. So I would ask questions and advice when I got a chance and take their answers seriously. (To be honest sometimes I already knew the answer, but you never know, I've also learnt some cool things that way as well.)
Eventually you build a rapport where you support each other and things go a lot better in many ways. And if he's got 15 years experience, I bet there is a lot he could tell you that's worth knowing.
I wouldn't worry about him and his cold shoulder, that is normal enough after what happened. In all likelihood he will have taken your input onboard and is being careful around you, and you probably have upset him a bit. But it's not a popularity contest, so unless he gets out of control over it, give him some space. Remain friendly and supportive and he'll come around.