http://www.cartechautoparts.com/brake-vacuum-pump/ Tech info and suppliers database for auto parts and car accessories. Tue, 25 Oct 2011 11:10:57 +0000 hourly 1 http://wordpress.org/?v=3.3.1 http://www.cartechautoparts.com/brake-vacuum-pump/comment-page-1/#comment-3009 bernard kelly Mon, 07 Feb 2011 14:09:36 +0000 http://www.cartechautoparts.com/?p=71#comment-3009 i have a volvo s80 2.5 diesel (2000 model). when idling it makes a knocking noise, like there is no oil in it but when i step on the break it stops. after a few seconds it begins slowly but knocks at the same speed as the revs. the car has sufficient oil and fluids, it runs perfectly but naturally i want to stop the knocking before it gets worse. anyone have any suggestions??? i have a volvo s80 2.5 diesel (2000 model). when idling it makes a knocking noise, like there is no oil in it but when i step on the break it stops. after a few seconds it begins slowly but knocks at the same speed as the revs. the car has sufficient oil and fluids, it runs perfectly but naturally i want to stop the knocking before it gets worse. anyone have any suggestions???

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