Quote:
Originally Posted by 745 TurboGreasel
Strange then that the greenbook would be so specific about the hole being installed pointing up?
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Interesting, I never looked at the book about this before, but I just did. As far as I could find, the book doesn't have anything about a t-stat bleed hole. It does instruct you to install the thermostat with the
"arrow" pointed upwards. IIRC I have never bought or removed a t-stat for one of these that had an arrow on it (or a bleed hole). Without a bleed hole, hard to imagine why the orientation would matter much either. Perhaps they got rid of the arrow sometime during production when they figured out that it was pointless... wouldn't be the only running change made, the last run of water pumps Volvo dealers sold came without guide flanges on the side of the pulley so evidently there were revisions happening right up until the end. At any rate I don't mean to argue the point, but unless I'm looking in the wrong place I'm not seeing any mention of a hole.
I always just install them with the bridge running horizontal.