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Coolant cap wont come off

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Old Aug 19, 2009 | 02:18 PM
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Default Coolant cap wont come off

So i've got a small leak coming form my coolant overflow, so i'm going to fix that today but i cant get the cap off so i can add coolant later.

how do i get the cap off lol, I tried one of those rubber jar openers it didnt work.
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Old Aug 19, 2009 | 02:21 PM
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big hammer
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Old Aug 19, 2009 | 02:24 PM
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Originally Posted by schpenxel
big hammer
lol, i dont want to destroy it, i want to unscrew it
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Old Aug 19, 2009 | 02:34 PM
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Originally Posted by Tikiman12
lol, i dont want to destroy it, i want to unscrew it
Those can be very tight. You need more clamping & twisting force to remove it.

If a piece of rubber and your hand grip are not enough, try a large set of channel lock type pliers.

Easy with the pliers - insulate the teeth of the pliers with the rubber jar lid remover.

Turn counter-clockwise to remove.


-
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Old Aug 19, 2009 | 02:35 PM
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Mine was extremely difficult to undo as well. What worked was to use 2 hands and back it off a little at a time. If I tried to unscrew it all at once it would not budge.
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Old Aug 19, 2009 | 02:37 PM
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NVM i found my oversized plumber wrench and got it lose, thanks for looking guys

and thanx for the help

Last edited by Tikiman12; Aug 19, 2009 at 02:50 PM.
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Old Aug 19, 2009 | 02:54 PM
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Originally Posted by Tikiman12
NVM i found my oversized plumber wrench and got it lose, thanks for looking guys

and thanx for the help
With the cap off, examine the threads on the neck of the tank. Since it's plastic, they can get crossthreaded, which makes the cap very difficult to put on and take off. Don't ask me how I know (happened on another GM vehicle I used to have).
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Old Aug 19, 2009 | 04:48 PM
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If it was that hard to get off, then it was probably put on too tight to begin with.
The cap has a rubber gasket, so it only has to be snug. I don't tighten mine much past when the gasket first touches.

Also, if you have a cracked reservoir, you are probably wasting your time trying to repair it. Best just to replace it with a new one.

Last edited by TEXHAWK0; Aug 19, 2009 at 08:44 PM.
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Old Aug 19, 2009 | 09:40 PM
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Speaking of coolant tanks. Mine has a small leak where the low coolant level sensor plugs into the plastic tank. I've cleaned it off, had a little gunk on it. Should I replace both or just the sensor portion. DEoes anyone else have a simplier fix? Thanks!
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