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03 Max 08-25-2010, 08:56 PM I'm in South Orange County and lookin' for a mechanic to fix what others have guessed "sounds like an air pump". I took the belt off and it went away. It sounded like the lowest pulley on the passenger side . . .whatever that drives (air -pump)? Its an 03 4X4 shorty Any mechanics in the area? Saturdays? Tolliwacker 08-26-2010, 08:09 AM That is the Vacuum pump that operates the EGR and emissions system. Easy fix, and since you live in Socialist Republic of California, you need that system. Are you getting a Check Engine Light? If not, then the pump is still drawing vacuum just making noise. DAVe3283 08-26-2010, 07:02 PM Yeah, it's probably the vacuum pump. They typically get loud long before they fail. Mine was making more noise than the engine for 20,000 miles before I finally just ripped it off. Tolliwacker 08-27-2010, 08:59 AM Mine went bad, I drove over to the Diesel Drag Race in Fountain FL 2 years back, Driving in a guy asked if I had a rod knocking, I said no that is the vacuum pump dieing......... 03 Max 08-28-2010, 02:38 PM Thanx guys, ya it s the vacuum pump. So they die slowly huh . . .good. I picked up a new pump and new belt, now i just have to get a pulley puller. What size do i need any idea? Tolliwacker 08-28-2010, 06:58 PM Use a Power steering pulley puller, borrow one at Autozone, they should have it. | ||