Erratic Temperature Gauge

Submitted: Thursday, Jan 13, 2005 at 11:10
ThreadID: 19318 Views:1625 Replies:3 FollowUps:6
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Changed my top radiator hose on my 80series (1hz) after noticing it was starting to crack on the weekend.
There was a fair bit of crud around the inlet so I cleaned everything as best I could before replacing the hose.
Ever since the temp gauge is very erratic, and intermittently drops dead before flicking straight back up to just below half.
It never goes above just below half and there is no water leaking anywhere.
The thermostat was replaced about 2 years ago and I have cleaned the temperature sender.
Does any one have any ideas on what might be causing this? Is it just a coincidence that it has happened after changing the hose?
Thanks
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Reply By: Member - Davoe (WA) - Thursday, Jan 13, 2005 at 11:23

Thursday, Jan 13, 2005 at 11:23
try a can of that contact cleaner you can buy and blow out the electrical conection where it plugs onto the sender sounds like a bad electrical conection. also when it dies have you tried the old bash the dash
AnswerID: 92772

Follow Up By: Ruffstuff - Thursday, Jan 13, 2005 at 14:28

Thursday, Jan 13, 2005 at 14:28
Hi Davoe,
geez your a helpful fella!!!, youve replied to a few of my questions .
I have some contact cleaner at work so i'll give that a shot first.
Havent tried the Dash Bash yet, it happens too quickly, the needle drops for about 1 second then comes straight back up.
Should catch up some time, im near midland, where are you located?
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Follow Up By: Member - Davoe (WA) - Thursday, Jan 13, 2005 at 14:30

Thursday, Jan 13, 2005 at 14:30
umm Kalgoorlie
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Follow Up By: Ruffstuff - Thursday, Jan 13, 2005 at 15:48

Thursday, Jan 13, 2005 at 15:48
LOL
Only a short distance away!!!!
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FollowupID: 351734

Reply By: Member - Sand Man (SA) - Thursday, Jan 13, 2005 at 11:27

Thursday, Jan 13, 2005 at 11:27
You mentioned there was a lot of "crud" around the inlet.
My guess is there was also crud coating the inside of the old hose and other areas which may now be circulating though the cooling system causing problems.

Suggest you drain the system, add a flushing agent, run the engine for the recommended time as per instructions and then REVERSE flush the cooling system to flush out all foreign matter.

Bill


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AnswerID: 92774

Follow Up By: Leroy - Thursday, Jan 13, 2005 at 11:29

Thursday, Jan 13, 2005 at 11:29
Bit of that crid maybe lodged in the thermostat. Thermostats cost bugger all so I'd change that anyway.

Leroy
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Follow Up By: Ruffstuff - Thursday, Jan 13, 2005 at 14:22

Thursday, Jan 13, 2005 at 14:22
Hi sandman,
can you reverse flush the system without removing the radiator?
what is the best way to do it ?
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Follow Up By: Member - Sand Man (SA) - Sunday, Jan 16, 2005 at 13:37

Sunday, Jan 16, 2005 at 13:37
Ruffstuff,

Reverse flushing is merely pumping water in via the bottom radiator hose, unitil the dirty water comes out of the top water inlet.

I think, when done by a Radiator SHop, they also use air pressure, but someone will correct me if I'm wrong.

Reverse flushing circulates the water in the opposite direction, hopefully dislodging particles sticking to the inner water jacket surfaces, that may be out of the way of the normal water flow. (e.g. behind blind ledges & corners.)
Bill


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Reply By: Member - Jeff M (WA) - Thursday, Jan 13, 2005 at 16:53

Thursday, Jan 13, 2005 at 16:53
Ruffstuff, yeah my surf did EXACTLY the same thing. However it was doing it just after I was playing around under my dash. And the BANG BANG seemed to fix it! LOL
It was a very freaky thing though, makes you kind of think WTF as you see it cut out and go back up again out of the corner of your eye...

It was doing it for a couple of weeks and then settled down, touch wood, hasn't done it for months now.
AnswerID: 92842

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