North American Turbocoupe Organization



Another mystery sensor
John B Offline
Member
#1
Does anyone know what sensor is in the heater hose going into the heater core? I’m asking because I’m going to bypass the heater core and replace all the heater hose in that area to work better with the new turbo setup.

Heater core hose sensor
88 Turbo Coupe: Front mount intercooler, MGW short throw shifter, full coilover conversion, tubular control arms front and rear, svo front brakes, vacuum assist brake swap, manual steering swap, GT35R turbo with external gate, pimpx ecu, 60lb injectors, 3 core aluminum radiator, corbeau fixed back seats, and the list goes on.
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Pete D Offline
Administrator
#2
Looks likes the sensor that keep the ATC (heater/AC fan from coming on until the coolant temp rises enough for warm air.
Pete Dunham


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Jeff K Offline
Administrator
#3
Yup, that is the EATC sensor that keeps the heater from coming on until coolant warms to around 110 deg F.
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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John B Offline
Member
#4
You guys are awesome; always coming through with quick answers. Ok so this car isn't a daily driver and I don't need heat for winter (not driven). I'm going to say that it would be alright to eliminate this sensor since I'm bypassing the heater core. Do you guys agree?
88 Turbo Coupe: Front mount intercooler, MGW short throw shifter, full coilover conversion, tubular control arms front and rear, svo front brakes, vacuum assist brake swap, manual steering swap, GT35R turbo with external gate, pimpx ecu, 60lb injectors, 3 core aluminum radiator, corbeau fixed back seats, and the list goes on.
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Jeff K Offline
Administrator
#5
If you arent going to have a heater core, the temp switch can be removed.
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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John B Offline
Member
#6
Great; thank you and since we're on the subject; what's the best way to bypass the heater core but retain a supply line for the turbo? It seems that one hose goes from the thermostat housing to an inlet on the heater core (this line also has the barb or "T" for the turbo coolant supply). The second hose runs from the water pump to the second connection on the heater core. This line also has a "T" in it that runs to a sensor on the lower intake manifold (Hose runs behind block). I'm trying to make this as simple as possible. I was thinking of linking the water pump to thermostat housing with one hose. This hose would have a "T" fitting as a supply line for the turbo with another "T" for a hose line to the sensor in the lower intake manifold... What do you guys think? Any suggestions?
88 Turbo Coupe: Front mount intercooler, MGW short throw shifter, full coilover conversion, tubular control arms front and rear, svo front brakes, vacuum assist brake swap, manual steering swap, GT35R turbo with external gate, pimpx ecu, 60lb injectors, 3 core aluminum radiator, corbeau fixed back seats, and the list goes on.
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anasazi4st Offline
Senior Member
#7
I had a leaking heater core for a time until I got around to pulling the dashboard back (**OUCH**) and replacing it. I live in Phoenix, and except for the rare times I travel into the mountains here I rarely have had a need for heat in the winters.

You want simple? Why not just bypass the heater core? When I had that problem I just put a u-shaped pipe on those hose connections—where the heater inlet and outlet pipes would normally be. I forget where I found such a pipe, I’m sure NAPA or another parts house would have such a thing...or a plumbing supply house.

Yeah, it’s not elegant. But it would work.

It’s like making a street in SimCity and not connecting it to anything (the cars just go to the end and do a u-turn)—SHOUT OUT to any other old gamers. (!!!)
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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John B Offline
Member
#8
anasazi4st Wrote:I had a leaking heater core for a time until I got around to pulling the dashboard back (**OUCH**) and replacing it. I live in Phoenix, and except for the rare times I travel into the mountains here I rarely have had a need for heat in the winters.

You want simple? Why not just bypass the heater core? When I had that problem I just put a u-shaped pipe on those hose connections—where the heater inlet and outlet pipes would normally be. I forget where I found such a pipe, I’m sure NAPA or another parts house would have such a thing...or a plumbing supply house.

Yeah, it’s not elegant. But it would work.

It’s like making a street in SimCity and not connecting it to anything (the cars just go to the end and do a u-turn)—SHOUT OUT to any other old gamers. (!!!)

Haha yeah; I mean I plan on looping the heater core but my questions is referring to the hoses coming to and from the thermostat housing and water pump. I could just simply loop those as well but that would still leave a mess of hard lines and hoses in that area. I want to clean it up and shorten everything. That's why I'm thinking a single hose from water pump to thermostat housing that has a T fitting for turbo supply and another T fitting for the coolant hose running to the intake manifold.
88 Turbo Coupe: Front mount intercooler, MGW short throw shifter, full coilover conversion, tubular control arms front and rear, svo front brakes, vacuum assist brake swap, manual steering swap, GT35R turbo with external gate, pimpx ecu, 60lb injectors, 3 core aluminum radiator, corbeau fixed back seats, and the list goes on.
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Jeff K Offline
Administrator
#9
Are you planning on keeping the oil cooler?
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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John B Offline
Member
#10
Jeff K Wrote:Are you planning on keeping the oil cooler?

To be honest, I think the previous owner removed it. I don't remember seeing the cooler when I did the last oil change but I will check. How would that affect the hose routing?
88 Turbo Coupe: Front mount intercooler, MGW short throw shifter, full coilover conversion, tubular control arms front and rear, svo front brakes, vacuum assist brake swap, manual steering swap, GT35R turbo with external gate, pimpx ecu, 60lb injectors, 3 core aluminum radiator, corbeau fixed back seats, and the list goes on.
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