Most tubes are soft steel tube & bend pretty easy, inspect yours first & see if there is a "near-kink" bend that could be straightened, I've had them in here where the owner removed the bolt from the tube support to access the spark plugs & never returned the tube support bolt & fought it every time until I simply replaced the bolt. Dipstick & tubes come in a variety of lengths & shapes you need to be carefull here. If confused send me a couple pics of what you have.