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  #1  
Old 02-21-2008, 12:17 PM
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Default Need to drain the coolant to change thermostat??

My thermostat is malfunctioning. I want to change it. My questions is do i need to drain the coolant in order to change the thermostat or its removal(old one) and installation of the new one?

Thank you

PS. Haynes repair manual says that they drain the coolant...

Engine ATW 1.8T 2000 manual
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Old 02-21-2008, 01:05 PM
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Default RE: Need to drain the coolant to change thermostat??

It wouldn't hurt would it...Actually it would if the coolant is hot/warm
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Old 02-21-2008, 01:32 PM
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Default RE: Need to drain the coolant to change thermostat??

Drain it. Red drain plug is on the driver's side of the radiator.
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Old 02-21-2008, 02:13 PM
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Default RE: Need to drain the coolant to change thermostat??

The only way you wouldn't have to drain it is if you could hold your car upside down while changing it so the coolant doesn't flow out of the hole.

Just flush it, it's good for your car anyways.
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Old 02-21-2008, 02:16 PM
 
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Default RE: Need to drain the coolant to change thermostat??

no need to drain just replace it and bleed the system when your done
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Old 02-21-2008, 03:18 PM
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Default RE: Need to drain the coolant to change thermostat??

how do i bleed the system?
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Old 02-21-2008, 03:25 PM
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Default RE: Need to drain the coolant to change thermostat??

let the car warm up with the radiator cap off.
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Old 02-21-2008, 09:00 PM
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Default RE: Need to drain the coolant to change thermostat??

Quote:
ORIGINAL: techbod

no need to drain just replace it and bleed the system when your done
I remember having to take the lower radiator hose off of the waterpump to change the thermostat... Am I remembering wrong or will this not drain the fluid anyways?
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Old 02-21-2008, 09:07 PM
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Default RE: Need to drain the coolant to change thermostat??

sure, if i have to remove the lower radiator hose in order to change the thermostat, its clear that a drain is needed.


PS. i didnt get under the car yet. Today its -20 below...tomorrow with a 1-2C it will be perfect
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Old 02-21-2008, 09:07 PM
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Default RE: Need to drain the coolant to change thermostat??

nope, if you leave the reservoir cap on and have the thermostat facing upwards, only some fluid will leak out. when you go put the new one back in, have someone unscrew the reservoir cap while you're pushing down on the thermostat. i put mine in with the reservoir cap on and it was hard as a **** lol
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Old 02-21-2008, 09:07 PM
 
 
 
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18, a4, audi, b5, bleed, change, coolant, diego, drail, drain, empty, flush, honda, rad, replace, san, thermostat


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