HELP!! 1994 360 - She keeps running Hot!
I'm new to the Forum and would love some expert advice on what to do next. I have a 1994 5.9 that has me completely baffled. This engine was completely rebuilt for me by a company back in 2005. It ran great for <50,000 miles till the truck was wrecked (not by me). Kept the engine to put in another truck as it still ran great & I had too many $'s invested. It set up for close to 3 years before I got it put in another truck. Fluids had been drained during storage as the radiator was history in this front end collision that had taken place. From the time it was re-started I had a problem with it running hot. I replaced the water pump, fan and thermostat with no change. It would produce a hissing sound at idle (like a vacuum leak) and would die unless you pumped the accelerator. I was told that gaskets can dry out when an engine is stored with no fluids and it could be the head gaskets. I pulled the heads - took them to a machine shop to be checked for cracks or warping and was told they were good. After reassembly with new gaskets, torqing specs and all - I cranked it up yesterday only to hear the hissing again. When it recovered from that - I watched the temperature gauge move slowly up to every bit of 250 degrees! The engine sounds great but, why is it still running hot and hissing? What am I missing here? I haven't questioned the radiator because it was working fine on the previous engine. I took out the block plugs and totally drained it before adding new antifreeze. Someone out there has to have a simple solution for me. I've worked my ____ off. This is a really good sounding 360 and obviously, this piece of Dodge is in my heart. HELP - - Please! Debbie