Hey,
I'm putting in a fuel pre-heater and was wondering if anyone has done this before. On top of the C2223 motor just off to the right of the thermostat housing are two hot water heater hoses that go to the heater core. There they attach at the firewall.
Anyone have an idea which is the send or receive? I want the hot water from the motor to go through the fuel preheater FIRST somehow and then continue on to the heater core.

Second question: I saw a heater core for sale on ebay for a NA 2223 diesel engine in a pickup truck some time back and in examining the photo of it, noticed it had a mechanical cut off switch. I think it's the same heater core as in the trooper, so if I assume correctly, this cuts off the hot water to the heater core if the heater controller on the dash is set to cool only. If this is the case, do I want to attach my send and receive for the pre-heater to the heater core hose? Wouldn't the heat to the heater core(and the preheater)stop if the dash setting was set to cool?
Is this making any sense?
Regards,
Jess
studio53@optonline.net