North American Turbocoupe Organization



What is this switch and hose?...
Kuch Offline
Member
#1
I am going through my 88 TC doing the turbo swap and while wrestling with every rusted on bolt, I busted a switch that is on the heater core outlet hose. What is this? Have to get a new one, but not sure what it is. Also, the orange colored hoses for the turbo coolant are not looking good and I want to replace them while I have access. Is this a special silicone hose for hi temp areas? Should I replace it with ordinary hose or does someone know of a factory type replacement? Thanks for the assistance.
1988 Turbo Coupe, Black/Black, 5 Speed, Moonroof, T3/T4 50 trim, 255LPH, BBK AFPR, 3" DP dual 2.5", MGW shifter, K&N, Gillis valve, RR cam
1964 Ford Galaxie 500XL, 390 6V, 4 Speed, Vast and fast
1960 Ford Starliner, 292 Y Block, 3 Speed, slow and low
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Jeff K Offline
Administrator
#2
I assume you have EATC. That thing in the heater hose is a low coolant temp lockout switch that inhibits the blower motor from running with coolant temp under about 100 deg F when the EATC is in heat mode. The switch hasnt been available for many years.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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Kuch Offline
Member
#3
Yes, I have EATC. Bummer it hasn't been available in a while. Just the plastic busted off of the top part, I should be able to still hook the wires up. At least I know what it's for, maybe some other year Fords used the same thing, a lot of vehicles use that type of heat. Thanks for the quick answer. So now, has anyone replace the coolant lines with straight brake lines with a flare adapter in the block instead of a hose?
1988 Turbo Coupe, Black/Black, 5 Speed, Moonroof, T3/T4 50 trim, 255LPH, BBK AFPR, 3" DP dual 2.5", MGW shifter, K&N, Gillis valve, RR cam
1964 Ford Galaxie 500XL, 390 6V, 4 Speed, Vast and fast
1960 Ford Starliner, 292 Y Block, 3 Speed, slow and low
Reply

Jeff K Offline
Administrator
#4
Could always buy a temp switch that trips around 100 deg from Digi Key, Me Master Carr, etc and adapt it to fit the fitting in the heater line.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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anasazi4st Offline
Senior Member
#5
I searched and searched for such a switch, using Ford’s part #s from the shop manuals. Using Ford’s part description from the manuals, I searched Google and Google Images. I had several auto parts stores search through their catalogs as well.

Not available. If you could find a salvage TC with its engine still intact (usually one of the first things to get sold), you could scavenge from that.

LIke you, I was upset that it wasn’t available. I want everything to work properly in my TC!

But that’s all that switch does—like Jeff said, it would not allow cold air into the passenger compartment until it was warm, so you didn’t have cold air blowing on your feet and legs. It’s more of a luxury item.

Where I am (Phoenix) it rarely gets below 40 in the winter...even when I travel into the mountains and freezing temps, I just start the car and let it run until the heater warms up.

Problem solved.
Another proud dues-paying member.

1987 Turbo Coupe w/T5OD, 8.8 axle, grey smoke; most options. Got it in 1991 with 41K miles: 3 turbos, 2 heater cores, 1 T5OD full rebuild, 5 clutches, 1 head gasket, 2 Teves II ABS units, etc. later....
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