A regular O-ring will work but makes the installation significantly harder, since a circular O-ring wants to jump out of the groove when you go to put the pump on the head unless you use some really sticky grease on it. The Volvo/Audi part has an oval shape that makes it much easier to work with.
Volvo sells the O-ring cheaply (I think $5 last time I got some?) and Audi likely stocks it too since these vacuum pumps continued to be used on gasser Audis here into the 1990s.
Volvo dealer should be able to find it for you if you call but if they have trouble, I probably have the part number somewhere too...
__________________
86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
Last edited by v8volvo; 08-11-2015 at 07:49 AM.
|