Macaulay Culkin's dad desperately wanted to reconnect with his estranged son -- according to sources close to the family -- and even took steps to end their feud ... but now Kit Culkin is fighting for his life and it may be too late.
Sources tell us Kit -- who suffered a massive stroke in Oregon Tuesday -- told family members he wanted to repair his relationship with Mac ... which soured back in the 90s during a nasty custody battle with Macaulay's mom.
We're told Kit was trying to get Macaulay's number --telling family members to pass the word on to his son -- but they never connected.
Macaulay's been traveling with his band lately, and we're told he's out of touch with most of the family -- so, they're just hoping he gets to visit his dad ... before it's too late.
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