While surfing around today, I found the following page: http://infoweb.magi.com/~cvolvo/Repair/B28F.html Looks like it may be of some help to anyone who needs to replace the water pump. I am actually looking to find out if the B28F was ever used in any Volkswagen cars. I am told it was, but have not found out for sure what it was used in, and when.... if at all. With all of the information I have found on the PRV-6, seems like no one has anything good to say about them, including the B28F version. Oh well :(