Matthew,

Please be sure to post up the results. I have changed just about every other single item concerning the cooling system (radiator, water pump, clutch fan, hoses, etc.).

I didn't even think about the collateral effects (misfires, transmission shifting issues - which, btw, when I put in my performance tune - the trans seems to shift not quite right. I suspect the performance tune "enhances" the issue. In fact, as "rough" as the truck runs - it is considerably worse with the performance tune.

Of course, I have the factory tune in the truck until I chase this down.

I just spoke to a mechanic friend of mine who stated if I could reach the CHT w/o removing the intake manifold I should just go ahead and attack it anyway as it removes one more variable.

He stated he has enough 18mm wrenches that I could certainly find one that would work. If nothing else it's still 20x's LESS expensive to buy a wrench and alter it like you did than pay a dealer/mechanic to do this "buy the book".

I'll be watching for an answer Matt, as I'm looking to do mine the following weekend (when I get back on my feet)!!

Thanks guys!

 

FF, how long did that job take? You can break it down by the job itself plus the wrench mod!! haha!!

 

The job itself isn't very time consuming it's more frustrating then anything until you actually get the sensor out turn a little at a time.

To break it down.

1.) Remove Battery cables. (I do so when ever I work on something electrical just in case)

2.) Remove or loosen alternator enough that you can get sufficient room to get in to the sensor itself.

3.) Once you have sufficient room to get the the sensor then it's time to bend and cut the wrench, I used the 3/4 even though it calls for an 18mm, it didn't fit was snug as I like.

4.)

If you're not sure of the location this is where your sensor is located. (Take note it shows the intake and all removed, you DO NOT have to do this if you have some patience.)

There really isn't much to explain, if you have any questions I will PM you my cell number and try my best to answer them. I've done just about everything imaginable to this truck that you can think of.

I'll try and get out in to the garage tonight and look around all the tools I made for different things and see if I can get a picture of the wrench for you, so you have an idea of what it looks like.

 

Awesome! I intend to remove alternator and feel for it. I have a mirror to reach under there if need be.

In addition I have my 12-yr old assistant since my hands do not lend themselves to fitting in small spaces!! He is really good at getting to places just like this!!

Thanks!!

Pics of the wrench would be great! I'm thinking an 18mm stubby might do the trick.

 

Btw, Matt, sorry to hijack your thread but sounds like this might just help you as well!! Thanks!!

 

Not sure why the picture turned in to a drum brake? But if you need the picture I had posted let me know I can e-mail it to you.

It's not hard to find at all.

If you feel like it, make a trip to PA I'd gladly help ya out.

 

you didnt hijack this is good info and I will be trying this aswell

 

I replaced this sensor today when I got off work only took a half hour. Took some pics on how I did it and will post them on here soon.

Not totally sure if it has fixed my problem, I read, or was told that it may take a couple drive cycles for things to clear up...Is this TRUE???

 

Everything I've read on here says that the computers "learn". They learn your driving habits, etc. I have always been advised to disconnect the battery for about 10 minutes to allow the computer to clear.

However, I just disconnect the battery whenever I'm working on something like this so when I hook it back up I expect it to be reset.

Have you noticed any improvement at all? Did you have to modify a wrench to get in there as FF did??

Btw, I crack up b/c every day that pic changes!! I DID see it the first day when it showed the location of the sensor.

Overall, Matt, was it a hassle for you? Looking to do that this upcoming week.

 

In my case it did not fix the problem. overall was not hard no tool modification was needed with what I used. A 20 buck sensor was worth a shot and I can add that to the list of new stuff on here.

 

disconected battery, pulled the belt off, 3 10mm bolt for the alternator and moved it out of the way, took my tool and and set it throught the opening next to the throttle cable. Broke the sensor loose and pulled the rest out by hand. put the new sensor on as much as I could do by hand and took a wrench to tighten it up a little more. Used my tool to finish up tightening and put it back together. Like I said it only took about an half hour. I dont know how he did it with a bended wrench but as long as it gets done who cares. It would only let me download these two pics so I hope they help.

 

OMG, you mean I FINALLY have a reason to use those Crowfoot wrenches that came in my toolset???? Haha!! Yeah, I'll spend 30 minutes to see if it helps!!

I'm just realizing, however, that you both have the V-10's... Mine doesn't look like your pic. I would have to go UNDER the crossover tube b/c it's against the manifold (which is plastic!)...

Well post after I try it!!

 

I have never had a reason to use those wrenches either and if it wasnt for them being on the seat of my other truck that I took to the parts store I would have never either thought of it.

 

Well, I finally got the opportunity to replace the CHT sensor. Once the alternator was removed it was clearly visible though still not easily accessed. I only had up to an 18mm crowfoot. It needs 19mm, btw...

However, I did have a 19 12-point boxed end offset wrench. I could get it on there but had so little room for a sweep that I couldn't even get it 1/12th of a turn. I did what FF did and heated that wrench, hammered it a few times and my new custom wrench did the job!!

Thanks for my son for helping me with his small hands to get back in there!!

The result: it did NOT fix my problem!! AT ALL!! I was 100% convinced this was the issue to my false overheat!!!

When I called a while back for this part the parts guy at Ford (this guy has been there for a LONG time) stated there are TWO coolant temp sensors on this truck!!! So I need to call tomorrow morning and find out about where the other one is and if they have that part in stock. I believe one is this CHT and I don't remember what he said about the other.

And looking at your photo above, Matt, it looks like you have a secondary coolant sensor next to your thermostat housing!! I have one in the same spot but I added it with my gauge! Yours looks factory.

I am still 100% certain that this IS a false overheat. But in addition my truck is throwing multiple misfires and running like a P.O.S. right now!! BUT....one thing at a time!!

I am growing ever more frustrated with this thing... Things that should be simple are ridiculously complicated. Btw, I saved at LEAST 5 hours of work replacing this sensor (according to the book which states to remove the intake manifold)!!

 

On my 99 there is a 2nd coolant sensor right next to the thermostat housing which I had also replaced along with the CHT sensor.

Did you do this yet?