Tarantino admitted two weeks ago that he had known about Weinstein's alleged conduct for decades.
"I knew enough to do more than I did," the Oscar-winning filmmaker told the New York Times, citing several episodes involving prominent actresses.
"There was more to it than just the normal rumours, the normal gossip. It wasn't secondhand. I knew he did a couple of these things."
The director's ex-girlfriend, Mira Sorvino, told him Weinstein had made unwanted advances while another actress made similar allegations years later, according to the Times.
"What I did was marginalise the incidents," Tarantino said. "Anything I say now will sound like a crappy excuse."
Weinstein and Tarantino have worked closely for decades since the producer distributed Reservoir Dogs, in 1992.
The pair also collaborated on Pulp Fiction, the Kill Bill films, Inglourious Basterds and The Hateful Eight.
Bourdain has been a forceful critic of those he has deemed complicit in the Weinstein scandal. He has called such people "nauseating chicken-hearted enablers".
Previously he slammed James Corden for being a "pandering tool" after he unleashed a series of jokes about Harvey Weinstein.
Bourdain also went after Hillary Clinton after she condemned Weinstein's behavior. The food and travel journalist characterized her response as "disingenuous".