Try replacing a few more random parts and see if that helps.
Or you could get a thermometer and see if the gauge is accurate and if the engine is actually overheating.
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| getting overly hot but no idea why https://www.ausmini.com/forums/viewtopic.php?f=2&t=86773 |
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| Author: | wallie [ Wed Aug 06, 2014 6:37 pm ] |
| Post subject: | getting overly hot but no idea why |
my mini's temp gauge rises to above normal operating temp when driving or even just holding on the accelerator idling as soon as i let it idle it drops right down to normal temp. ive replaced radiator, waterpump, hoses, thermostat & radiator cap so im thinking electrical, so could my sensor be nackered or the wire probably touches the alternator, its got me stumpped as there's not much else to replace |
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| Author: | Mick [ Wed Aug 06, 2014 7:04 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
It will be your voltage stabiliser, its rising and falling with the line voltage. |
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| Author: | wallie [ Wed Aug 06, 2014 7:18 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
that's annoying, i replaced that less than 6months ago lol |
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| Author: | Morris 1100 [ Wed Aug 06, 2014 7:23 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
Try replacing a few more random parts and see if that helps. Or you could get a thermometer and see if the gauge is accurate and if the engine is actually overheating. |
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| Author: | Mick [ Wed Aug 06, 2014 7:23 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
Have you made one using Wombats design? A few bucks and quite good. |
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| Author: | wallie [ Wed Aug 06, 2014 7:28 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
nope i havent seen wombats design but sent him a PM. where would the best place to check the temp from be and what sort of range, considering how fast it rises then drops i dont think its over heating as it takes less than 2 sec's to rise then about that again too drop back down to normal temp position on the gauge |
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| Author: | Mick [ Wed Aug 06, 2014 7:33 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
Actually, Wombat used to sell them on here. I thought there was a design in the How-To, but there's not. Drop him a PM. They'll be a little more robust than a 40 year old one. I'll have a search around for the design all the same. |
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| Author: | Mick [ Wed Aug 06, 2014 7:46 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
Here you go. Hop to it!  http://www.britishv8.org/articles/mgb-v ... ilizer.htm You need an MC7810 Voltage regulator from Jaycar, and maybe an LED and 1000 Ohm resistor if you like LED lights telling you its working. Edit: Jaycar don't have MC7810, but there's three ways of doing it with just two more 1/4 Watt resistors, A 240 Ohm and a 1.6k Ohm (1K6 in Jaycar) and either a LM317 or LM337. Don't screw them down onto metal. Might be time for a How-To. 
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| Author: | drmini in aust [ Wed Aug 06, 2014 8:10 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
I found my standard old [1970 vintage] voltage stabilizer was prone to vibration when moving. The faster I went, the lower the fuel gauge would read. Then when you stopped at the lights, you could watch the needle come back up!  But, if I ran the car up on stands at 80 or 100 kmh, it didn't do this. I then flung it away and fitted a wombat special, it has been fine ever since. 
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| Author: | drjbeam [ Wed Aug 06, 2014 9:12 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
wallie wrote: that's annoying, i replaced that less than 6months ago lol Join the club but my parts are 12 months |
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| Author: | wallie [ Thu Aug 07, 2014 9:49 am ] |
| Post subject: | Re: getting overly hot but no idea why |
drmini in aust wrote: I found my standard old [1970 vintage] voltage stabilizer was prone to vibration when moving. The faster I went, the lower the fuel gauge would read. Then when you stopped at the lights, you could watch the needle come back up! But, if I ran the car up on stands at 80 or 100 kmh, it didn't do this. I then flung it away and fitted a wombat special, it has been fine ever since. yea i was having fuel gauge issues then replaced it which fixed, il take it all out & check it hasnt wobbled out least taking the gauge cluster out is an easy job. |
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| Author: | Diesel27 [ Thu Aug 07, 2014 6:22 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
I enjoy watching the fuel tank gauge rise when the engine temp increases. |
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| Author: | Mick [ Thu Aug 07, 2014 7:25 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
I emant to drop by Jaycar today but I forgot. I'm going to make up the how-to this weekend. I've got a spare voltage reg here I'll gut to fit it all in. |
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| Author: | drmini in aust [ Thu Aug 07, 2014 7:58 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
Wombat's later version had no tin can, the regulator chip just had 3 flying leads with spade lugs soldered onto it. I just tucked it up into the wiring loom, it doesn't get hot. |
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| Author: | wallie [ Mon Aug 18, 2014 4:52 pm ] |
| Post subject: | Re: getting overly hot but no idea why |
ok bumpity up, ive replaced the voltage stabilizer, and discovering my cluster broken circuits.... ok then, i chucked in a spare i have and temp gauge is still rising, next will be too test the temp, what sort of temp range idling would i be looking at? the chances of 2 dodgy gauges seems a little unlikley but as this 1 dosnt have working indicator or hi beam lights its possible |
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