Engine Oil Dipstick Tube

The dipstick tube is the lower portion of the dipstick access tube, where it seals to the engine block. Being in the so close to the engine, the dipstick funnel is subject to extreme temperatures and can often crack or break when removed. Don't take the chance of a broken funnel dropping plastic debris into your oil pan, not to mention losing the ability to check for a proper oil level, and replace it now.