this is the broken spark plug
If the head was leaking coolant into a combustion chamber you would have been seeing white exhaust smoke (at least that is what used to happen in the old days!), perhaps #3 cylinder is where the leak was occuring? If so the piston will be be discolored?the spark plug is still broke off in the [URL=https://www.nissanclub.com/forums/usertag.php?do=list&action=hash&hash=3]#3 [/URL] cylinder. I want the head off because Im hoping to replace it but prior to my spark plug incident I was putting a gallon of antifreeze in my car every 6 weeks or so
But the reason it broke is probably because of the amount of coolant burning/leaking into cyl 3...so while I agree you could *likely* clear all the debris...he has compelling reasons to remove, plane, and re-install the head (it's already leaking significantly). He needs to know if it's just the gasket, or if the head itself is cracked.The broken part of that plug could be extracted without pulling the head.
Thanks for the reply,, I was working on this head for a while before my heart attack and just now able to start getting back into it,,,those stripped hex head bolts were a nightmare to get out, in all there was three of them that were stripped.They are water passage plugs and do not come out. I looked at Rock Auto and 10 bolts in a head bolt set. So, no, they do NOT come out.