I'm looking at a 2002 DII (124k mile) is excellent condition but overheated with the subject symptoms. Of course, the owner, sailor, has a loan and hopes to get the payoff (that isn't going to happen at $5k). I'm suspecting it has a blown headgasket but haven't been able to see the truck in person. Any ideas what to look for specifically? I'm well adept in the DI's but not the bosch powered DII's.