Originally Posted by brad97
If it has overheated to the extent that is boiled out the coolant you may be in big trouble. Drastic overheating on a northstar engine will pull the head bolts out of the block. To repair this problem is a major and expensive job. The bolt holes have to be drilled out and threaded inserts installed. The engine/ trans should be dropped out of the car to do this. A mechanic will probably charge $2-3K to do this. You best hope this has not happened. The symptom is that on a long uphill climb all the coolant boils out.
You are responding to an 8 year old post.