Oh yeah I've been down that road several times if you reflect back in the thread 3 thermostats high volume pump high Flo thermostat cured it for a while I think the problem now making it hot is a head gasket that's why the hoses are hard as soon as I start it. I don't really care about that at this point I'm wondering about it acting like it's running out of fuel. Because I don't want to have that problem with the new motorHave you tried flushing the system out? Mabey a good fush with one of those kits that ties into the heater hose and a can of radiator flush would help, provided the rest of the system is good thermostat, fan ect.
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