Coolant routing question

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

May 19, 2012
Hey there, on my 69 FJ40, I want to pull the heater core from under the dash and save it until I get around to fixing the blower one day.

I was examining the tubing system, and found that the core appears to be supplied from the intake manifold, and returns to a connection at the lower radiator hose. (Pictures below)

My question is, when I remove the heater core, can I simply plug these two passages, or do I need to run a hose that connects these two points.

By the looks of it the supply line has a needle valve on it which might allow one to turn the flow of coolant on or off which would lead me to assume a connection to the lower hose is not necessary?

Any help anyone could provide would be greatly appreciated.


You CAN cap them off, but it is usually easier to get a no-leak seal if you just put a piece of copper tubing between them and a couple of hose clamps.

Users who are viewing this thread

Top Bottom