Sunil D Austin , TX November 02, 2020 Appliance: General Electric Dishwasher GSD4020Z07BB Ge Dishwasher Gsd4020z07bb: GE dishwasher leaking from under the unit during drain cycle. How to replace Valve Body Gasket. Googled a few possible causes of the leak and headed to appliancepartspros.com. The DIY videos here have always been spot on. I replaced the gasket insert and valve body gasket, but the unit still leaked. This time, I watched the dishwasher drain and traced the leak from the solenoid assembly. A search on this site, said a small washer WD8X181 (AP2038837) needed to be replaced. Waiting to receive the part and try again this weekend 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours