Technical confusing problem

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Technical confusing problem

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Nov 17, 2007
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confused with my punto mk1, at first it was overheating as there was not enough coolant in it, because of the lack of coolant the fan wasn't coming on either as it obviously wasn't circulating.
So i just filled it with water and let it run to see if the fan would come on, and it did. Only thing now is i'm unsure if the temperature gauge is reading right, as it didn't even reach the middle and the fan was coming on and off, i would've thought the fan only would've come on when the needle was starting to move towards the red,

hope someone gets this and isn't confused themselves :)
 
that's right, coolant was pretty much non existant and temp gauge rose almost into the red, now the needle goes to just above 1/4 and the fan comes on and off

edit: to save making a new thread, the car makes a weird noise sometimes when shutting the door, it's like a metallic humming noises that resonates through the car, can't really pinpoint it

thanks
 
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at first i thought the thermostat was faulty but i took it off and tested it and it works fine, yeah ideally i want the cars temp gauge to reach the middle, seems a bit odd that it isn't and the fan is either kicking in too early, or the temp gauge is inaccurate, i guess i could just live with it, but not sure if it'll affect the engine in the long run
 
My temp gauge only just gets above the quarter the the fan kicks in, so maybe thats normal?
 
yeah it could well be normal but this engine's been so badly maintained i'm replacing quite a few things anyway, although thermostat appeared to be working fine the amount of rust/limescale deposits in it were dire when i put it aside a new one
 
Clean the cooling system internally with radflush solution. But watch out for any leaks it uncovers when sludge is washed out of any corrosion holes. Annoying, yes but better than having the crud fall out on the motorway, lose your coolant and overheat the engine.
 
yeah i bought some radflush the other day as i suspect the block and rad to be dirty, i think i'll do that tomoro before i fit new timing belt, water pump and thermo, save the new parts from getting filled with crap
 
i've just come in from using radflush, i think my radiator must have been 90% rust,
no need to drain coolant by removing the bottom hose as its currently peeing the coolant out as i'm typing this, can't pinpoint where from, i think it might be more than one place but a rad's not too much expense, just need to add it to the never ending list of parts for the engine
 
thanks for that, hopefully the block is solid, it's just the rad that's turned into a sieve... hopefully :eek:, i've read around and some nutters say to avoid flushing the rad as it can cause leaks,
would rather have a new rad with no holes than one full of holes plugged with rust
 
Dead right!!!

I always say flush the system especially when the coolant has dropped for no obvious reason. If in doubt on an old car just swap the rad anyway. Its only £30 and RadFlush is £15- though TBH I would swap the rad and then RadFlush it to clean the block and not have the stuff overloaded with rad gunk.
 
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