Heater Core

[DereksNissan720]

i got a 86 720 but there is no heat. and i don't know exactly what i need to make it work. can someone post a thread explaining how and what to do. pictures help out alot.

[breadbox]

First things first, make sure it hooked up. there are two lines on the firewall passenger side, are they connected? Next put a new thermostat make sure yours is there and not stuck open.

[DereksNissan720]

okay i do know what your talking about, but what do the hoses need to be hooked up to?

[dayid]

Where does your thermostat read when the vehicle is warmed up?

Also, does the fan work just with no heat, or what?

[DereksNissan720]

thermostat i dont have one in the dash i think but yup just blows but no heat

[dayid]

Are parts of your dash missing or what then? No temperature gauge? Probably the truck just isn't warming up enough to give heat - unless you're loosing coolant or can verify that the heater core is leaking...

[DereksNissan720]

there is a temp gauge sorry, but i dont think the hoses are hooked up to anything. so im asking what does the part look like that these hoses need to connect to. these are 2 big hoses coming through the firewall. the truck warms up but the module blows air just not heated air

[86 720]

take a picture of the hoses to make sure everyone is on the same level.

One of the hoses should make an immediate turn and connect to the rear of the engine block. The other hose should connect to the water outlet neck near the water pump.

If these are hooked up, and your truck runs normally, chances are your heater core is clogged and needs to be replaced.