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I've replaced mine twice.... Posted by MI-Roger [Email] (#882) [Profile/Gallery] (more from MI-Roger) on Mon, 9 Nov 2009 05:05:49 In Reply to: What makes it so hard to replace the center pulley?, B Millar [Profile/Gallery] , Sun, 8 Nov 2009 23:09:48 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Two issues make replacement of the center idler difficult:
1) No space in which to work. The head of the bolt is scraping the car's body as it releases the final thread when being removed.
2) You are working blind when installing the new pulley and bolt.
My local Indy sort of stated they hate replacing this pulley when I last had my car in for suspension work. I think they were surprised to learn I had done it myself - twice.
The pulley rides on a bearing which slips over a boss cast into the timing chain cover plate. This boss needs to be machined to the proper bearing ID, and then drilled & tapped to accept the pulley bolt. These machining operations would have to have been performed at the engine factory for a "short belt" car to be converted to a "long-belt".
Eliminating these machining operations while Saab was building "short belt" versions would have saved money and scrap, but resulted in an additional service part to manufacture, catalog, and stock. Maybe all engines can be converted, maybe not.
posted by 198.208.15...
_______________________________________ Saabs owned: 2008 9-5 Aero Sedan, sold at 227K miles 2006 9-3SC 2.0T - Wife's daily driver 2000 Viggen Convertible - Sold May, 2022 1964 Quantum IV Formula Car - Retirement project 2000 9-5lpt Sedan, sold at 318K miles
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