New hours at the diner will be 7 a.m. to 9 p.m. daily, starting Monday, Aug. 14.
It also will serve lunch as well as dinner, a telling sign for the up-and-coming neighborhood.
Also: The P.J. Clarke's bar-restaurant set for the Curtis Center has been delayed till early 2018.
"He fought a heck of a battle," his daughter, Audrey Onorato, said.
"Most founders end up leaving the companies they sell," Jeff Benjamin said. "Now seemed like the appropriate time."
The Chestnut Hill chef was not formally trained but learned his craft in the "school of hard knocks, man."
Carerina Ho, a home cook from Jakarta, is in the kitchen.
Co-owner Michael Welsh confirmed the shutdown, declining to elaborate.
A P.J.W. rep said a new venue is on the way, declining to provide specifics.
Cicala's departure, announced to Le Virtu staff Thursday, follows a posting on Instagram Tuesday by his wife, pastry chef Angela Ranalli Cicala, that she had departed from the restaurants with a "semi-heavy heart."