so, went to adjust the valves on an 88 325i and much to my chagrin discovered that the exhaust side #1 cylinder head bolt head has snapped off. Proceded with the valve adjustment, it went OK, better than it was (the valves). Question is, has anyone succesfully easy-outed just one snapped bolt and replaced or do I have to take the entire head off to replace? So far no other damage or coolant issues; these are the original hex-head bolts and the car has 165K miles on the engine. I did remove the snapped off head and washer of course. Thanks for any insight...I am not sure what to do with the car now...may be more effort/expense than it's worth...thanks