I have a 1990 firebird 3.1L V6 and Im having trouble finding the heater hose diagram/routing. The previous owner removed the heater hoses and valve to bypass the heater core. I am in the middle of replacing the heater core and adding a heater valve. Can someone please provide a hose diagram or photos where everything goes. Im pretty sure the connections are different from that of the V8 engines. Thanks.

 

Do you have hardline heater tubes or were they removed? They would be attached to the passenger side frame rail. There are several different routing options.

 

They were removed. I've seen in some photos online that the heater valve is just below the alternator (between passenger wheel well and alternator) I would want to run in pretty much in the same factory location. The lines were removed from heater core. I was looking for a 3.1L V6 hose diagram online but couldn't find one.

 

Is this the one you saw? This is from 92 Camaro manual but I assume it is similar...

 

Its close but it's missing the heater control valve near the alternator. I have the vacuum line that comes from the interior heater control switch secured where the original heater valve is supposed to be located.

 

Here is another pipe stup which is probably what was there...

The diverter attaches right above the 3 way pipe section there.

 

 

That's it. Thank you for your help