DanielSLe

I recently put a b16 swap in my 92 hatch and when I drive, temp stays fine except when in traffic or stoplight my temp goes and starts to overheat. When I completely stop and turn off my engine I hear a boiling sound and all my radiator fluid leaks thru and covers my carpet floor. Is the heater core the only place where radiator fluid goes from the engine to the car?

macson

Sounds like it, or a broken line to/from the core.

DanielSLe

The core is inside the enginebay?

b20vteclsintegra

no its inside the dash right behind the heater controllers.

detour94civic

my heater core is just plain garbage how hard are they to change and were do i start its pretty cold here right now and dont fee llike freezing all the way to work.

thbx59

Just be sure to order the heater core online, dealership prices are insane. My heat and temp gauge went out last week but there are no catastrophic leaks so it's probably the thermostat.

strategy400

Check your radiator fan if its coming on. Also, if there's a leak in the cooling system it will lose efficiency they are designed to run under pressure (liquid under pressure has a higher boiling point).

Also check the pipes coming through the firewall into the engine bay from your heater core, they are super soft crappy metal that is easily crushed or distorted. If the hoses are stuck cut them off and replace (do NOT grab with pliers they will crush). If they somehow got distorted they might leak. You can sometimes carefully make them round again with a deep socket or something. Also you could cut the heater hoses and couple them together to bypass a bad heater core (no heater but thats better than overheating).