Small thread here but figured id document how i ran My coolant lines to the heater core in my swapped z3
the input and return lines on the z3 require 1 inch hose to the actual heater core piping The hoses i Ran from the input of my v8's intake manifold and return from the water pump were 3/4 inch so i ran 2 reducer elbows which can be seen in this photo here
as far as a shut off there are a few option i didn't opt in for an electric shut off valve or anything at least yet as the weather doestn typically fluctuate where i live so i have an Inline shut off valve just like seen in this photo
essentially it just cuts off the feed line to the heater core so if i determine its not going to need flow i just turn the actual valve and it shuts off flow to the heater core as opposed to attempting to repurpose the OEM unit
the input and return lines on the z3 require 1 inch hose to the actual heater core piping The hoses i Ran from the input of my v8's intake manifold and return from the water pump were 3/4 inch so i ran 2 reducer elbows which can be seen in this photo here
as far as a shut off there are a few option i didn't opt in for an electric shut off valve or anything at least yet as the weather doestn typically fluctuate where i live so i have an Inline shut off valve just like seen in this photo
essentially it just cuts off the feed line to the heater core so if i determine its not going to need flow i just turn the actual valve and it shuts off flow to the heater core as opposed to attempting to repurpose the OEM unit
