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How does the thermostat work?

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Old 15 July 2003, 01:49 PM
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magnet
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my93 leggy turbo?
& whats the pointy bit on the top for that spins about 90 degrees?

Cheers
Old 15 July 2003, 07:06 PM
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Leviathan
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Thermostat is shut when cold, stopping coolant going through rad.
When coolant reaches a pre determined temp, the 'stat opens letting the coolant into the rad to regulate temp.
If it jams shut, engine overhearts.
If it jams open, engine will not reach normal opperating temperature.
Hope this explains abit.
Old 15 July 2003, 07:10 PM
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Leviathan
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Dont know what the little disc is for, probebly somthing to do with the stats construction or something.
There filled with some sort of wax wich expands when its gets hot and so pushes against the spring, opening the 'stat.
Old 16 July 2003, 08:36 AM
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magnet
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cheers
Just replaced the thermostat..
still running too hot, hope its just an air lock.
Heater ran hot twice only after i replaced the coolent and thermostat.

Old 16 July 2003, 08:41 PM
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Fuzz
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Not sure if I'm thinking about the thing you're thinking of but...]

the little rotating bit in a hole on the stat is to prevent the hole from "furring" up and blocking. The hole is there to allow air to escape when filling the system (to get rid of air locks)
as the stat will be in the "closed" position.

My tuppence worth.

Andy
Old 16 July 2003, 11:55 PM
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David_Wallis
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think you may be right andy as it is me that removed dan's (magnets) thermostat..

David
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