My D15B7 blow, so I'm swapping it out for a D16Z6. And I'm replacing the timing belt on the D16Z6, well its on the engine stand. But I can't get the crank pulley off. I tried heating the bolt that don't work....I bought a 50mm hex head crank pulley holder and took to breaker bars, plus heated the bolt first...that didn't work. Anybody have any idea's. I'm open for suggestions.