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2001 cr125 antifreeze in engine

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So rode today and bike was running fine until I shut it off and tried to start it back up. The bike would not kick over no matter what. So I thought to check and see if I fouled a plug and when I pulled the plug it was covered in antifreeze so I took off the exhaust pipe and it was full of antifreeze does anyone know how this would happen.

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i just replaced my seals on my impeller for the water pump. i have a cr250. if your weep hole is sealed somehome i think that could do it. or it is probably a gasket somewhere. im kinda just winging it...

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I will check the gaskets when I get home, and no the bolts aren't torqued to specs which I should have done when I rebuilt it. How would I know if the cylinder or cylinder head isn't warped?

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Torque your bolts to spec first. Cylinder head and base nuts are gonna be 20 ft/lbs. It's not so much as to ensure everything's tight, but mostly to ensure even pressure all around. You did use new gaskets when you rebuilt it right?

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Yes all gaskets are new the do I need to pull the engine apart to get the radiator fluid out I also have extra gaskets should I replace them while I have it apart

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The last time I rebuilt the engine I used heat resistant silicone could that have anything to do with it?

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