So the natural question arises will the previously made blog comments harm you or get your site penalized? I will not say that Google will penalize you for spamming your links on other blogs but you should be aware that links present in those blog comments will not carry any value for you in your search rankings. So if previously made comment links was in anyway lifting your rankings then you might probably see your rankings go down gradually.

However I really think Google will still value links that are present in really good comments. But my assumption is Google might think of devaluing links present in the comments area in future or don’t consider them at all probably for rankings in their algorithm just like the links present in general directories are not valued anymore. But for now let us not worry about it, its still a good practice to build links with really good comments that you can make on do-follow blogs.