Guinness
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| posted on 28/2/08 at 04:11 PM |
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Erratic Temperature Gauge
Last night I fired up the Indy, after it's winter hibernation and went down the pub to meet the NE7ER's. Checked the oil and water levels
were OK before I set off, and the battery was full of electricity.
On the way home the temp gauge was acting irratically.
Usually it goes from cold up to 80C, occasionally 90 or 100 in traffic or on the track.
Last night it went from cold to 80, then to 70 then to 110 then to 120, then back to 70. It did this for about 5 minutes and then went full
deflection off the scale at 130C for the rest of the journey home. No signs of obvious overheat (steam, leaks etc) and the fan didn't come on
automatically (but I did use the override switch just in case).
Wondering what could cause this?
Loose wire somewhere?
Damaged sender from winter storage?
Air lock near sender (it's at the top of the thermostat)?
Knackered water pump?
Mike
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RazMan
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| posted on 28/2/08 at 04:23 PM |
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After a period of hibernation I would first look at an airlock.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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Mr Whippy
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| posted on 28/2/08 at 04:32 PM |
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just corrosion, wiggle the connections
an airlock usually make the temp drop like a stone and the heater go dead if it's running normally then no real prob
[Edited on 28/2/08 by Mr Whippy]
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nitram38
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| posted on 28/2/08 at 04:46 PM |
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Also a possible sticky thermostat
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02GF74
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| posted on 28/2/08 at 04:46 PM |
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dunno but how quickly did it change?
a repsonse of about 1 second = very quickly would indicate electical fault.
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r1_pete
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| posted on 28/2/08 at 07:13 PM |
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are you using a voltage regulator on the +ve feed, could bo dodgy.
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snapper
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| posted on 28/2/08 at 11:44 PM |
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Check the obvious first, corosion on the conections, check a good earth to the block for the sender.
Don't forget to look at the oil temp and oil presure.
If the water temp is eratic and the oil temp is fairly constant then it is the water temp sender or guage.
If oil temp rises and oil presure drops then you have a serious heat problem
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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