Giant Cedar Tree Splitting Trunk

[JRoth]

Hi all! I have a big beautiful cedar tree on my property and it’s splitting directly down the center of the trunk. The split is getting noticeably deeper down the trunk, over about a year. What steps should I take to care for it and prevent it from getting worse? 

thanks in advance for your help! 

Edited January 19, 2020 by JRoth
Pictures added

[Khriss]

2 hours ago, Gary Prentice said:

Would I dare do that?

Can't help myself from preaching can I?

...yea n look wot hapned to John the Baptist mate, got his head chopped off with a salami  ! K

Edited March 20, 2020 by Khriss
Sorry- just been reliably informed it was the exotic dancer 'Salome' who initiated the deed ?