problems with 258 overheat, etc
I just bought this jeep and took it to my mechanic today. new thermostadt, radiator flushed and like new, no leaks worth noting. the engine can idle all day, but overheats quick as soon as the rpms come up. he thinks it may be a cracked block. if it is, should I just order a long block (like from rebuilt-jeep-engines.com) and have someone put it in? What else is involved?I don't know if the engine in it now is original or not. I have a 86 CJ7 with the 258. Please Help!!