Jabo

Ive been working on my heater this evening and have found that Im not getting flow to the heater core at all time.I chaged out the radiator last week to a open loop radiator but now no flow .What do I need to do to get water to flow threw the heater core

prerunner1982

Depending on the year there should be a vacuum operated valve on the passenger side that controls flow into the heater core. There are 3 or 4 heater hoses coming out of it. The valve should also have a small vacuum line from the top going into the fire wall. If not, locate it and reattach.

I am having a problem with mine as well. Not sure yet if it is a vacuum problem or what, but as of yesterday I was finally able to get heat and with it being in the mid 30s in the morning that was a good thing. Now I just wont touch it again until it warms up.

Jabo

The valve shows to be swithching.