Heater Hoses, what to do with them?

[Miata Master]

Ok so I yanked out all my vents/controlls/blower the hoses that would go to the heater core are now useless. Can I just cap/clamp each hose or do i need to connect them? thanks

[Ramius83]

Although I did retain my heating system, it is a "flowing" system. I would definitely connect the two together. I think that by capping the outlet heater hose, it may create some back pressure and cavitate the water pump more so than usual. But that is just my thinking behind it. Maybe Jon will chime in.....

[BoostFab]

just loop them, let the coolant system circulate

[420_240]

weird... when i pulled my motor from the clip.. the hoses were looped... now that it's in my car and hooked up ... i still have no heat

[JonPowell]

weird... when i pulled my motor from the clip.. the hoses were looped... now that it's in my car and hooked up ... i still have no heat

Stop thinking man. It's detrimental to your survival. If the hoses are looped how can the coolant reach your heater core? How can that heater core get hot? How can your blower motor push air over the hot fins of the heater core, warming said air, and pushing it onwards to your ice cold feet?

Although I did retain my heating system, it is a "flowing" system. I would definitely connect the two together. I think that by capping the outlet heater hose, it may create some back pressure and cavitate the water pump more so than usual. But that is just my thinking behind it. Maybe Jon will chime in.....

just loop them, let the coolant system circulate

Correct answers!

[420_240]

that's the thing... the hoses aren't looped anymore... they're hooked up to the heater hose ports on the firewall... still no heat

[goofynick6]

Is that weird little mechanism in place with the cable on the hose that comes from the firewall? It is like a shutoff valve for the heater core, could be switched shut.

Nick

[JonPowell]

that's the thing... the hoses aren't looped anymore... they're hooked up to the heater hose ports on the firewall... still no heat

Remove that valve completely, check your thermostat....make sure that everything is hooked up to your AC controls & boxes under the dash.

[lyon23]

Is that weird little mechanism in place with the cable on the hose that comes from the firewall? It is like a shutoff valve for the heater core, could be switched shut.

Nick

check this valve like nick says and check the cable and the motor that pushes the cable.. I had a friend that had a broken cable and it did not push the valve in either direction.

[420_240]

i've inspected this valve before but never really got a closer look at it... should it easily be opened by hand? I don't think i ever got mine to open... is this the valve i should remove completely?

[goofynick6]

Yes, I found I wasn't getting heat either, turns out I'd accidentally hit it during install and it shut and didn't open back up. I don't know really what it is for, but other cars don't have them, so I'd assume they can be nixed.

Nick

[240sxed]

People really should be having issues with the ac lines... not the heaterhoses, they're just plug and play, if they're switched, just switch them (flow in/ flow out). Heat is essential to defrosting, and keeping you warm, plus if your car ever starts to overheat, the heater can actually help you limp it to the gas station etc.

[Slo_240sx]

Either that valve is shut closed, you have an air pocket in the heater system (cooling system related), or a blend air door is bad.

[JonPowell]

Or bad thermostat.

[Slo_240sx]

It would overheat or atleast run very hot.

[goofynick6]

Remove that valve completely, check your thermostat....make sure that everything is hooked up to your AC controls & boxes under the dash.

I'm contemplating removing this valve...any input on what it actually does? I'm thinking it prevents things from getting too hot? Or maybe helps heat things up faster when the engine is cold?

Thanks

Nick