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Post Info TOPIC: Radiator expansion tank or not


CALLANDER, ONT

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Radiator expansion tank or not
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I topped up the rad apparently forgetting that there's no expansion bottle and ran around town for a while. When I shut it off at home the coolant ran out the tube made a small puddle then stopped. Now I'm thinking I should order one of them long shinning tubes to stop this. My question is are they really necessary or has my rad adjusted itself to a level  it needs to be at? I ran it a few more times since and this hasn't happen again but I cannot see my coolant level and that bothers me. 

I'm sure it's simple to some but hey if I was 100 % percent sure on there purpose I wouldn't ask 



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St THOMAS, ONT

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You can use anything for a container, so it doesn't need to be one of the fancy ones , if you don't want. Take a hose, and connect it to the overflow line, and run it to the container. If you run it in the top of container, allow it to go inside to near the bottom, so it can suck the coolant back into the rad when it cools down. Rads with overflow cans run a different rad cap from a regular rad.

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CALLANDER, ONT

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I do appreciate that
The cap is 15 psi right now so do I get one for less pressure ?
Thanks

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BARRIE, ONT

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if you leave it as is it will find its own level in the rad with out the barf can. Usually an inch or so from the top.

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CALLANDER, ONT

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I just might but gonna watch the temp for few runs and see if it runs warmer then normal
Thanks

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BARRIE, ONTARIO

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I put over flow tanks on my stuff . Just pick a spot to hide it . I like to use bottles that have a viewing slot or tube so you don't have to pull the cap off to check the coolant and you can see the level hot cold idling etc

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WEST PERTH, ONT

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Water boils at 212 F. Every pound of pressure (cap) increases that by 3 degrees.
So a 15 pound cap will increase that boiling point from 212 to 257.

Your thermostat stuck ?

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CALLANDER, ONT

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I don't believe so as it holds steady on hwy and comes up in city traffic like it should. It doesn't jump around.
At the show this weekend talked to a few guys that had them and feel that this is the way to go
Like the site tube idea.

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Senior Member

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Was towing the other day...An all of a sudden The gauge hit 235. an could not stop nor slow slow down!!!
Thought that was it for sure! (engine time)
Much to my surprise That 30 year chevy took all it got dished out to it.
Yeppers dam stat Hard to buy GOOD ONES anymore!
Funny thing The plastic factory over flow tank did errrr job ,Not a drop on the Ground.
Was she really boiling ...? Once stopped didn't seems to be... Cause she was also low on coolant as it was Last topped up with water which does boil off.

Thought I'd share the experience .Maybe we can learn something...HaaaaaaHaaaa Haaaaaa

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