How cold does it need to get before the water in an engine block freezes...... - VW Forum - VZi, Europe's largest VW, community and sales
 


     
 

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Old 29-10-2008, 12:49 AM   #1
Mr Big
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Default How cold does it need to get before the water in an engine block freezes......

I've just realised the VR6 I bought earlier in the year as a project is sat outside in this lovely weather and I have no idea if it has any antifreeze in it The front end is right up against the house so it might keep a bit of warmth into it.

If there was no antifreeze in it, how cold you reckon it will have to get for the water inside the block to freeze. Cracked waterways is not something I fancy.

Should I just go outside and dump the water out of it onto the drive?
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Old 29-10-2008, 12:51 AM   #2
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er 0C as thats when water freezes?
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Old 29-10-2008, 12:52 AM   #3
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I'd say the water needs to be about 0 degrees C!.
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Old 29-10-2008, 12:54 AM   #4
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Yeah thanks for that useful info

Its not like its water sat on the ground though. Its inside the engine block which is inside the car, so its going to be insulated from ambient temp.
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Old 29-10-2008, 01:03 AM   #5
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Just take the lid off the reservoir , that way if it does freeze it will just expand out the reservoir and no damage will be done.
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Old 29-10-2008, 01:04 AM   #6
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anything down to -4 or -5 and you should be OK. After that, well you are on your own. Just 1 or two litres of cheap anti freeze would protect you from freezing in this country
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Old 29-10-2008, 01:07 AM   #7
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With my limited mechanical knowledge, I'd say this... find an all-night garage and buy some antifreeze.
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Old 29-10-2008, 01:10 AM   #8
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throw an old blanket under the bonnet too
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Old 29-10-2008, 01:13 AM   #9
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Quote:
Originally Posted by Mr Big View Post
Yeah thanks for that useful info

Its not like its water sat on the ground though. Its inside the engine block which is inside the car, so its going to be insulated from ambient temp.
How so? If the air temp. is 0 degrees then the block will be as cold as anything else in the vicinity. You'll blow the core plugs first even if you do remove the rad/reservoir cap.
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Old 29-10-2008, 01:17 AM   #10
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Fook me its cold out there! Just been out to pull the expansion tank cap off, push it right up to the house and drop an old blanket under the hood.

Hopefully it will be ok until tomorrow afternoon when I can pick up an antifreeze tester. Cooling system is full at the moment so cant top it up with antifreeze. And its pitch black outside so I cant find the bottom hose to drain some out.

Its not in use at the moment anyway and its supposed to be going in for a coolant flush and refill next monday. Just wish i'd remembered when it was a bit lighter outside.
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