Is this a two part sensor with the posts coming out? I need the pipe/hose that goes to the temp sending unit, 1 goes to the firewall & 1 goes to the throttle body.



My truck is gushing antifreeze. Mechanic said it was coming from this, but he didn't know what the part was. I'm not having any luck finding it at a parts store.

 

It looks like the COOLANT TEMP SENSOR (CTS).

 

what is the hose or pipe that plugs into it?

 

Heater hose tube
https://www.dormanproducts.com/p-106386-626-589.aspx

 

what is the pipe just below the sensor? That's where the hole is.

 

CLICK HERE - https://www.dormanproducts.com/p-106386-626-589.aspx
And you will see the actual service replacement part (tubing and sensor) ...


Why would the sensor be an actual part of the tubing (if it is) and not be able to be serviced separately? ($$$)

EDIT -

Something is not right here (other than myself). Is there a provision in that tube for a separate CTS? I don't have cataloging for this period but something ain't right.

1997 F-SERIES 5.8L engine?

 

You need to order the correct part. The dorman one above is for a F150, and you probably need one for an F250.

https://www.dormanproducts.com/p-124912-626-570.aspx

 

I think that threaded fitting is for screwing it into the intake manifold; it's not a temp sensor. On a Windsor engine, the big threaded hole that it goes into is near the thermostat housing.

And yes, you do need to get the correct part, or it may not have the correct routing for the hoses it needs to connect to.

That nipple below the sensor in the highlighted red square may be a fitting to route coolant line to some other component. In my 87 Mustang, it feeds the EGR plate to help cool it. The plate has an exit port that is connected to a hole in the back of the intake manifold for coolant return.

 

Yeah, I finally found a partial photo of the install -





The coolant sensor is mounted on the tube manifold assy and is separate. That is what was confusing me, not that it takes all tha much.

 

OP, There are two engine coolant temperature sensors:

A). The ECT you pictured is for the PCM / ECM, depending on what you have. It is a ‘two wire’ sensor. If replacing you will find two styles of this sensor listed online; Round with round pins, and Rectangular with flat pins, make sure you order the correct one. Yours is round.

B). The second ECT is located on the intake manifold is for the dash temperature gauge, and is a ‘single wire’. Located near the forward left hand corner of the lower intake manifold.


The heater pipe assembly in the picture houses the PCM ECT, feeds coolant to the heater core and to the throttle body.

There are two versions of that assembly for the 351w, regardless of model.

1995 - 1997. Motorcraft KT-84 (Doorman 626570), press in manifold fitting.
1994 and earlier. Motorcraft KT-81 (SKP: SK626589), fitting is attached.

The issue I’ve run into is the KT-84 has a separate fitting the assembly presses into. The fitting corrodes internally on the sealing surfaces and is no longer available, I’ve yet to find a new one. Junkyard fittings may not be any better.

The earlier version fits, and the fitting is not a press in fit. I’ve used the older style KT-81 in place of the newer KT-84. You will need to move the heater hose slightly, and use different mounting points if going this route. It is an easy ‘mod’.

Both early and late versions install in the same intake outlet, using the same size and thread. There is no difference other than the fitting style. Several threads out there with leaks on the newer style press in fittings.

Unfortunately, It looks like Motorcraft has discontinued both of them. You can find Doorman / SKP on Rockauto under the ‘Heat and Air Conditioning’ section, then under ‘Heater hose’ section.


Early KT-81 on left, Late KT-84 on right.


KT-84. 1995 - 1997, this what yours should be. Heater hose outlet is behind egr, mounted on rear egr mount stud.


Earlier style: 1994 and previous, KT-81, heater hose outlet is ahead of egr. The mount needs to be slightly modified to mount to the forward egr mount stud.


Another view of the KT-81.

 

NOW THAT POST WAS EDUCATIONAL