Dash Control and Heater Hose

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Russell J
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Dash Control and Heater Hose

Post by Russell J »

I have two questions so I'll put them in the same post to hopefully make it easier.

My truck is a 1972 F100 Styleside.

#1 - What the heck used to be here? I'm pretty sure this thing never had a second fuel tank, so what would that hole be for?
Image

#2 - Which one of these two hoses sends the hot coolant IN to the heater core. I need to install the valve and I'm not sure which one it goes on, the yellow or the blue arrow hose?
Image

Thanks in advance for any help and clarification!!
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sargentrs
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Re: Dash Control and Heater Hose

Post by sargentrs »

I like to use this truck as a reference http://www.fordification.com/70explorer_358miles.htm You can see the hose routing in one if the pics. That hole in the dash does not look original but that be about where the manual choke knob would be.
Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: http://www.fordification.com/forum/view ... 22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1987 F-150 XLT Lariat, 5.0/C6 auto.
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Russell J
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Re: Dash Control and Heater Hose

Post by Russell J »

Thank you!! Those pics are perfect!

My truck was originally a 3 speed manual, but had since been converted to automatic. Anyone know if it would have come with a choke? I'd like to put whatever control that belongs there back in place, even if it's attached to nothing.
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HIO Silver
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Re: Dash Control and Heater Hose

Post by HIO Silver »

The heater control valve goes on the yellow-arrowed hose.
70 F100 LB 2WD, 360FE, E-Street EFI, TKO-500, 76K original miles.. follow my rebuild: The Lo-Buck Bumpside
71 F250 LB, 2WD, 360FE, T18, PS, PB, D60 with 4.11s
73 F100 SB 4WD, 390FE, NP435, +4 on 35s

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Russell J
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Re: Dash Control and Heater Hose

Post by Russell J »

Hmmmm, HIO. That looks contrary to what I'm seeing here...

Image

And here...

Image

Does anyone know if it matters which hose the valve is actually on?
72BahamaBlue
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Re: Dash Control and Heater Hose

Post by 72BahamaBlue »

"Does anyone know if it matters which hose the valve is actually on?"

When I changed the heater core in my '72, I forgot which goes where, got them reversed. It seems a little hot coolant got into the core even with the (new) valve off. Switched the hoses at the core, no more constant heat.
So, yes it might matter, an easy fix if you get constant heat with the valve off.

For that blank hole, maybe a manual choke or a cargo light switch?
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Russell J
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Re: Dash Control and Heater Hose

Post by Russell J »

Thanks Bahama! So which hose ended up being the correct one?
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Re: Dash Control and Heater Hose

Post by 72BahamaBlue »

Russell J wrote:Thanks Bahama! So which hose ended up being the correct one?
Man, I was hoping you wouldn't ask that!
I don't remember...I sold the FE 360 years ago.
In the photos, looks like the FE V8's had the valve on the hose connected to the fitting on the intake.
My six cyl has it on the hose to the water pump, seems to cool down when valve is closed.
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sargentrs
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Re: Dash Control and Heater Hose

Post by sargentrs »

Looks like FE routing is control valve on the intake hose http://www.fordification.com/tech/image ... tegral.jpg
Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: http://www.fordification.com/forum/view ... 22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1987 F-150 XLT Lariat, 5.0/C6 auto.
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Russell J
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Re: Dash Control and Heater Hose

Post by Russell J »

Hadn't seen that schematic! Thanks Sargent!

So, according to all this, I should be attaching the valve to my hose with the blue arrow? Is that the consensus? It looks right to me.
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