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by Longnails - 15th May 2025 12:16pm
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Joined: Mar 2004
Posts: 187
Enthusiast
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OP
Enthusiast
Joined: Mar 2004
Posts: 187 |
my saphire keeps overheating carnt put it through mot
i have changed the fan moters
fan switch
thermostate
its not losing water under normal driving but if sat idleing it overheats
any ideas please let me now
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Joined: Nov 2004
Posts: 7,238
Wiki Addict
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Wiki Addict
Joined: Nov 2004
Posts: 7,238 |
How is it running?? It may be running lean (too much air not enought fuel) causing it to run hot.Or it could be a blockage in the cooling system.Do the fans run? You say uve changed the bits but you dont say weather they come on or not?
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Joined: Nov 2003
Posts: 2,899
Forum Master
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Forum Master
Joined: Nov 2003
Posts: 2,899 |
Ok back to basics, Does it have Water AND Anti-freeze? You need antifreeze especially in the winter but many people dont realised it contains anit-rust agents AND doesnt boil at 100degrees, When water boils it has airbubbles in it which do not help the cooling and less water it physically in there. Remove thermostat completely (You dont need it unless your a jessy in the cold weather  ) - This removes one possible fault, It sounds like you may have a blockage OR airleak. Feel all hoses once engine is 'hot' and you will be able to identify a blockage. Airblock - Turn heaters on full whack, remove cap off headertank, locate the top radiater hose and squeeze release squeeze until you see bubbles appear in the header tank Or check the sponserslink 
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Joined: Mar 2004
Posts: 187
Enthusiast
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OP
Enthusiast
Joined: Mar 2004
Posts: 187 |
im not stupid daz and scoop the fanns dont kick in but work when linked straight to a battery
cheers boys ile try the blockage thing then get back to you
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Joined: Nov 2003
Posts: 2,899
Forum Master
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Forum Master
Joined: Nov 2003
Posts: 2,899 |
Try the fan sender then, only about £3 and are common to go!
Simple job too, the sender its self is a 12mm
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Joined: Nov 2003
Posts: 5,327
Forum Veteran
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Forum Veteran
Joined: Nov 2003
Posts: 5,327 |
Remove the wiring plug from the Thermo-Switch (Fan Switch) and bridge a piece of wire across the two contacts with the ignition on, if the fans kick straight in then the Thermo-Switch is faulty. If the fans dont kick in then check the fuses.
Let me know what the result is.....
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Joined: Mar 2004
Posts: 187
Enthusiast
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OP
Enthusiast
Joined: Mar 2004
Posts: 187 |
cheers jay ile try that and let you know
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Joined: Dec 2003
Posts: 5,683
Wiki Guide
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Wiki Guide
Joined: Dec 2003
Posts: 5,683 |
Water pump? Not only overheat-age but also seizure and knackered engine.
"C20 LET bang"
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Joined: Mar 2004
Posts: 187
Enthusiast
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OP
Enthusiast
Joined: Mar 2004
Posts: 187 |
im pretty sure its not the water pump becouse the car would not have run for the past 6 months if the water pump had gone thanks any meik
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More Bins
by diggingdeeper - 19th Jul 2024 11:05am
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![[Linked Image]](http://www.cruisewirral.com/gallery/members/0312/cruisewirralsignature0312.jpg)
![[Linked Image]](http://img.photobucket.com/albums/v624/scoop2004/hasssitesig.jpg)
