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Car question using a coolant hydrometer

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By (user no longer on site) OP   
over a year ago

Any mechanic types here?

I bought an hydrometer and in the instructions I have to take expansion lid off then run engine to temperature first

Can't I just use the hydrometer on cold engine coolant as it sounds dangerous otherwise

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By *rafter69Man
over a year ago

upminster

No doing it hot is to allow any combustion gases to be present in the coolant system

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By (user no longer on site) OP   
over a year ago


"No doing it hot is to allow any combustion gases to be present in the coolant system"

Yikes.. okay.. better get some gloves

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By *rafter69Man
over a year ago

upminster

Sorry dude if its just antifreeze do it cold thought you was checking for headgasket leak-mis read it after a few pints ??

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By (user no longer on site) OP   
over a year ago


"Sorry dude if its just antifreeze do it cold thought you was checking for headgasket leak-mis read it after a few pints ??"

Ah right lol.. thanks for the advice. I'll get round to doing it sometime this week cheers mate

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By (user no longer on site)
over a year ago


"Any mechanic types here?

I bought an hydrometer and in the instructions I have to take expansion lid off then run engine to temperature first

Can't I just use the hydrometer on cold engine coolant as it sounds dangerous otherwise "

Don’t do this… you will realise why if you actually do

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By (user no longer on site)
over a year ago

There's nothing dangerous about those instructions, if you run it up to temp with the cap off there will be no pressure build up.

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By *inballs99Man
over a year ago

Blackheath

Test it cold buddy I was a senior technician at mercedes for 15 years

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By *ranny-CrumpetWoman
over a year ago

Crumpet Castle

Make sure you listen to me first though. I used to work in Jacob's biscuit factory and my father never repaired a car in his life. xxx best of luck xxx I've pushed a car up a hill.

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By *UGGYBEAR2015Man
over a year ago

BRIDPORT


"Make sure you listen to me first though. I used to work in Jacob's biscuit factory and my father never repaired a car in his life. xxx best of luck xxx I've pushed a car up a hill. "

Is that a metaphor for life Granny.

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By *erry bull1Man
over a year ago

doncaster

During my time in the army when stationed in Germany , we always checked the coolant with a hydrometer when the engines were cold , the instructions were to keep the coolant based at -21 , the reason being was to take into consideration the chill fracture when driving in winter conditions

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By (user no longer on site) OP   
over a year ago

Thanks for all the replies everyone

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By *ools and the brainCouple
over a year ago

couple, us we him her.


"Make sure you listen to me first though. I used to work in Jacob's biscuit factory and my father never repaired a car in his life. xxx best of luck xxx I've pushed a car up a hill. "

Your the best Granny

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