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Discussion Starter #1
Hiya!

I just changed my thermostat housing, flushed out the old coolant and put in some new coolant. I went for a little drive and noticed my temperature gauge didn't move at all - it stayed in the position it's in when the car is off.

Any idea's on why it's not working now?

Thanx heaps. :)
 

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Discussion Starter #3
Do you mean the device which is bolted on top of the thermo housing which has a wire connected to it? I'll have to see if I plugged it in properly...what does that wire do anyway?

Thanx :)
 

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wires

Those are your temp probes one goes to the temp gauge and the other goes to your ecu, of you do not connect them sometimes you will get a check engine light along with no reading on your temp gauge.

HTH

Michael
 

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It does sound that the sensor wires weren't plugged back in, or are only partially plugged in and not making contact. However, if it is indeed plugged in properly, you may have air in the system. In any case, burp your system no matter what whenever you change your antifreeze! You'll end up with all sorts of expensive problems if you don't, like blown head gaskets!
To burb your system, park the vehicle on a steep incline or drive the vehicle onto some ramps (I use the plastic ones made by Rhino from the parts store). With a cold system, open the radiator cap, turn your interior heater all the way to hot, then start the vehicle. Let it warm up, while watching the flow of fluid in the radiator cap. Top off if it is low, turn the car off then reinstall the cap and take it for a drive.
If you're afraid of gettin' sprayed with hot antifreeze from the radiator(which WILL happen with stuck thermostats!), keep the cap on, but not locked. One click open will do it for ya. Follow the same instructions as above.
Let us know what it turns out to be!
Chris
 

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Discussion Starter #6
Thanx guys...I'm about to try to correct the problem now. (I just woke up - it's morning here lol)

Chris - my driveway is a bit steep so maybe I can just park it there to try to get the air bubbles out. I think there is air bubbles in there because as I went for a drive I heard a "gurgling" sound from the engine...I assume that's the coolant. I'm a bit scared at the idea of taking the radiator cap off and running the car...eep! Isn't the radiator cap supposed to work under pressure or something? I'm not going to have to dive for my life if I do this...right? lol :shock:

I may have just plugged that wire in the wrong way...

Anyway, I'll fiddle around with it now and give you an update... :wink:
 

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Nights,

Do exactly as Chris has told you. If the car is cold, there is no danger of exploding hot antifreeze. Just take the cap off, turn the car and let it idle. You won't have to worry about antifreeze bubbling out unless you are really goosing the throttle to speed the process up, which by the way I would NOT recommend doing from under the hood if you aren't really familiar with this process.

Also, trust me, I have 2 83's, you can't get the nose up in the air too high.
I have a very steep drive and I usually point it nose up put chocks behind the rear wheels and then jack the front end up with my shop jack another 3 foot and then use a ladder to be able to see into the radiator.

The only time you should see any bubbling of the antifreeze is when an air bubble is coming out. Some times really big pockets of air can surprise you.

If you have an air bubble trapped on the back side of the T-stat, you will most likely get no reading from the temp sending unit even if it is plugged in properly. The unit can't read air temp, it can only read liquid.

When you put the thermostat in, you did make sure to put it right side up? In other words, the diddle valve is straight up and not down or on the sides is it? If so, it will be almost impossible to get all the air burped out. Also did you cut the diddle valve off and drill out the hole a little bit? That makes it much easier to get the system to fully burp.

Just be patient and as Chris already said, make sure you have the windows down or the doors open and the heater set to blow at highest heat and high speed fan. Depending upon your altitude, this can take awhile. I live just over 6.000 ft. and it takes me well over an hour to burp the system after a coolant or T-stat change.

Remember not to have any pets around while you are doing this as antifreeze tastes very sweet to them but is deadly.

HTH

Leslie
 

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Discussion Starter #8
Hmm...I checked the wires, they seem to be connected ok. I just did the "burping" of the cooling system as well...but still the gauge doesn't work. Argh! :(

What shall I do now?

In regards to the wires, there are two sets I'm not sure about. On top of the thermo housing there is a blue one...and right under the thermo housing there is a brown one. Which one does what?
 

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Same Problem here only it was intermittent........The gauge would bounce around though............especially after it was warmed up. I'd stop to get gas or whatever. pull out,and the needle would be pegged hot. then bounce around like it had loose connection. then it would settle down back to the middle and stay there...........I guess i'll purge the system and clean the contacts to the sensor and see what happens.

I just bought some Rhino Ramps from PepBoys Auto, 2weeks ago_On sale for 20 bucks. :D ........nice and light yet strong.
 

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SupraPilot,

If your gauge needle is bouncing around, I can almost assure you that your Temp sending unit is bad and needs to be replaced. They will either go completely flat or bounce back and forth when the sender is bad.

Leslie
 

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I believe that the temp probe that sends the signal to the instrument cluster is under the thermostat housing, bolted to the block itself. Hard to see, but you can feel it (just be sure the engine is cold or you'll get burned). It has a single wire attached to it. I don't know which color that wire is, but it can easily get pulled off accidentally when doing other work in that area.
Hope that helps.
 

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You know i'll bet you're right Leslie. It would only do this also when the OAT was high.......it's cooler out latley and has not acted up yet.......
Time to buy another part.........good thing i love this car.

Intis
 

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Discussion Starter #13
Ohhhh! It's that one Dean. I know it...and I think I know how it stuffed up...as I took apart the old thermostat housing, I saw that wire and the connector at the end of it was rather old and a bit corroded so I decided to lop it off and put a new connector on it...maybe I didn't put it on properly or something? I'll check it soon...I think maybe when I put the connector back on the wire might of got unattached...because I had to pull quite hard for it to reach...D'oh!

Thanx heaps...this might have solved the problem...I'll report back! :)
 

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Discussion Starter #14
Success!!

Woo hoo! It was that wire...the little connector that I put on it the other day had come off.

Dean, you said the magic words... "Single wire" and "Engine block". That just made me remember... :)

This forum rocks! I would have never guessed that wire was for the temperature gauge...how do you guys know so much?!?! :shock:

Thanx Leslie and Chris for telling me about the 'burping'...I never knew air bubbles could cause such problems...appreciate the help! Thanx to everyone else for your help also. :D
 

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Nights,

Congratulations. Doesn't it feel good when you finally get it figured out?

Glad we could collectively be of some help.

That is really what the forum is all about. Helping each other.

Leslie
 

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Discussion Starter #16
Oh yeah! It feels great when everything falls into place and works out fine...last night I began to worry because I thought I might of damaged something...but it turned out to be something simple and you guys helped me find out what it was...I would of been stuck otherwise. :)

This forum is great because unlike a lot of other forums, you guys reply right away with constructive and helpful information that is to the point. Most of the time peoples problems which are posted on here are worked out within a few posts...it's awesome! :D

P.S Your avatar is cute Leslie...I like the little trailer at the end of your car... 8)
 

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NiGHTS said:
Success!!

Woo hoo! It was that wire...the little connector that I put on it the other day had come off.

Dean, you said the magic words... "Single wire" and "Engine block". That just made me remember... :)

This forum rocks! I would have never guessed that wire was for the temperature gauge...how do you guys know so much?!?! :shock:

Thanx Leslie and Chris for telling me about the 'burping'...I never knew air bubbles could cause such problems...appreciate the help! Thanx to everyone else for your help also. :D
How do we know so much?
Well, we each know a little, due to our own experiences with our cars.
Collectively, we know a whole lot!! :) And THAT is the great thing about this forum!
 

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It's stuff like the above that really makes me happy we went ahead with this forum. Too cool - this makes me smile.

-Steve
 
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