B7200 antifreeze leak in the head?

[kevinwiseley]

Working on a b7200d Kubota and exhaust pipe manifold bolt was broke off flush with the head. So got a drill bit and drilled a little bit , about a half inch and stuck an easy out in there and started backing out the broken stud bolt and I start getting antifreeze? Weird I’ve done this before on different engines and I’ve never had this issue? Anybody got any advice on this?

 

[North Idaho Wolfman]

It's normal, all the engines in that series have the exhaust bolts threaded into the water jacket, just put some pipe dope / thread sealer on the stud / bolt when you reinstall.