Carlos, 

those operators/observables weren't removed. Now you must import them 
manually.

import 'rxjs/add/operator/retry';
import 'rxjs/add/operator/timeout';
import 'rxjs/add/operator/delay';
import 'rxjs/add/operator/map';



this.http.post(url, JSON.stringify(json), {headers: headers, timeout: 1000})
         .retry(2)
         .timeout(10000, new Error('Tiempo de espera alcanzado.'))
         .delay(10)
         .map((res) => res.json())
        .subscribe(
          (data) => resolve(data.json()),
          (err) => reject(err)
        );

See the changelog for alpha 48 
https://github.com/angular/angular/blob/master/CHANGELOG.md

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