air pump????
06-12-2010, 03:43 PM
#1
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air pump????
Was looking at a 2005 today and upon start up, I noticed an air sound. The source was what looks to be an air pump -driver's side, front of engine, runs off drive belt. Is this stock or is it after market for some reason? Truck has a pacbrake exhaust brake if that helps. Any ideas?
Andy
Andy
06-12-2010, 04:15 PM
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As far as I know, Pacbrake has an electric pump, not belt-driven. That sounds like the pump for a Jacobs exhaust brake. Sounds like maybe the previous owner mixed and matched parts to me.
06-12-2010, 10:18 PM
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It is a vacuum pump. The Jacobs brand runs off vacuum instead of air pressure. Those little vacuum pumps are spendy, make sure it is operating properly before you buy the truck......
06-13-2010, 12:38 AM
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06-13-2010, 05:31 PM
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