I bought a 92 YJ and drove it home 20 miles with no problems. Heat worked great and the engine temp was fine. Checked all fluids and topped of the engine coolant. Drove it for the second time today and got smoke coming from the defroster vents. Cooland was leaking out of the heater onto the floor. Checked under the hood and it was dry. There must be a break in the line inside the cab??? Help. I am new to the YJ
Yes you can bypass the heater core. Just connect the to hoses together with a piece of pipe and take a couple of nylon ties and tie the hose out of the way. Tie it to the grill brace rod to keep them out of they way. You will need a small piece of pipe, I think the hose is 5/8 id.
Nothing is foolproof to a sufficiently talented fool.
When I replaced my heater core there were two sizes for the piping. I think that was so you could not reverse the flow into the core. When you decide to replace the core make the job a lot easier by removing the passenger seat. It will save your back from looking like a pretzle. Good luck with the repair.
Yes use regular coolant. If you use already prediluted 50/50 mix you do not have to anything else but if you use straight coolant you have to dilute it. Make sure it is green and not the red extended life.