Does anyone know what is normal vacuum for a gear driven pump on a 6.2? I checked mine and it read 6 in. Hg. at idle and revving, no difference. ?
Enthusiast
Vacuum Pump vacuum
Does anyone know what is normal vacuum for a gear driven pump on a 6.2? I checked mine and it read 6 in. Hg. at idle and revving, no difference. ?
Diesel Junky
I think it's around 20 but I can't swear to it. I can say 6 definitely sounds way low.
1886 M1008 CUCV
GM4 Turbo,DB24911 turned up.
Raptor 100 lp.
NV4500(the way they should have come)
5 inch Redneckmaster Ex
Autometer Fullsweeps
Serp Belt conversion. HO WP. Dmax Fan
Previuosly owned:
2000 K3500 6.5TD
1993 K3500 6.5TD
1983 K5 6.2
1998 GMC Suburban 2500 6.5TD
1991 GMC Jimmy 6.2
1989 GMC Vandura 2500 Hi Top 6.2
1983 GMC K2500 6.2
1999 Ford Suerduty 350 7.3PS
1983 Ford E-350 6.9
1982 VW Rabbit Diesel
Administrator
It should be 20-26" at any RPM at the inlet port. 6" is a bad pump, or you have leak(s) between the pump and your test point.
Enthusiast
I have one with a speed sensor on top. Can I just replace the "pod" or do I have to get the whole thing? Is there any difference with a federal emissions "pod"? I don't see any california emissions "pods". It looks like you have to buy the whole deal for a california emissions one. Thanks for your help.Originally Posted by DmaxMaverick
Administrator
The pod isn't serviceable. It's replaced as a unit.
Enthusiast
I'll order a new one and replace it. Thanks for all your help!
Enthusiast
I got a rebuilt vacuum pump "pod" and installed. Now I have vacuum around 22 in.hg. Do I need a check valve on the hoses? This one didn't have any check valve. Also the pod I ordered, delphi #1696 was supposed to be for a pump with a speed sensor. The inlet pipe interfered with the speed sensor so I had to remove my old one and install it. Not too hard. Any comments?
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