Recently replaced the balance shaft belt and timing belt. Now I get a distinct high pitched whine that I am sure is from the balance belt. The car was bought recently so I don't know how the B234f should sound. I've read all the FAQs and D stevens stuff on this topic(very helpful) but still not sure how tight the balance belt should be. Does the whine indicate too loose, too tight or just right? No access to the $500 Volvo tool. Car runs well.