I am new to this forum and thinking about buying a 1990 or newer 4runners (4x4) for my son. We looked at 2 1990's yesterday. One was at a dealer and looked like it had some overheating issues in the past with only 87k miles, (supposedly). The other was private party, with 240 K miles, and said the engine was rebuilt 55k ago. He added that he was a mechanic and that the older 4 runners has issues with the headgaskets. He used Felpro headgaskets during the rebuild. He is only asking about 3k for that one. Question is, if I buy one of these older 4 runners, am I looking at a lot of repair and maintenance issues? Should I look at another year series? I believe these two were 6 cylinder engines.