I recently learned a little about how the VVT cams work and what you said. I also learned the damn cams aren't keyed to the pulleys that's why you have to lock them when you do the seals. I guess that's why they use adjustable cam gears from the factory
I'd bet the chances are tensioning is not as critical as volvo made it because the last retard didn't tension the belt enough and it lasted sixty thousand miles. I'll take a pic of the tensioner when I do the job to show how bad you can screw this up and have it last sixty thousand miles. I'm also amazed the original pump, tensioner and idler can last 185k. The retard just changed the belt, there is play you can feel in the idler so I stopped driving the car.
One other odd thing about the procedure is that volvo says go a quarter turn past the alignment setting and then go counter clockwise to get the marks to line back up? No one in the videos does this. I've never watched a video of timing belt jobs, unfortunately youtube wasn't a thing when I did my first timing belt, but the manual tensioning aspect with numerous positions had me worried. Normally they aren't this complex.
Last edited by free4meS60; 01-10-2018 at 08:03 PM.
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