The complete automotive resource for buyers, sellers, and owners like you.
Car, Truck and SUV Forums at Roadfly
+ Bentley Forums
+ BMW Forums
+ Cadillac Forums
+ Chevrolet Forums
+ Ferrari Forums
+ Jaguar Forums
+ Lamborghini Forums
+ Lotus Forums
+ Mercedes-Benz Forums
+ Maserati Forums
+ MINI Forums
+ Porsche Forums
+ General Discussion
+ Marketplace Forums
Re: 86 735i: what pump(?) is this?... (archive)
[ Follow Ups ] [ 7-series (E23) Message Board ] [ Msg. Board FAQ ]
Posted by demet on November 13, 2000 at 11:04:29:

In Reply to: Re: 86 735i: what pump(?) is this?... posted by Hanif on November 13, 2000 at 03:16:18:

HVAC = Heating, Ventilation and Air Conditioning system. The pump supplies vacuum to the HVAC and stores it in the vacuum reservoir located under the front cowl. If any hoses, vacuum motors, or tee connections are leaking then the pump will run more often trying to supply the system with the necessary vacuum. The best online source for information on the HVAC is Callan's site, see link below.

demet

It is your HVAC vacuum pump. You have a leak somewhere if it runs more than 45 seconds. Look for the leak as the pump will burn itself out if left running to long. This pump is quite expensive and sometimes hard to find.


It is definitely running more than 45 seconds. This is a bit of a new adventure for me, so I would appreciate some input. What kind of leak am I looking for? What does HVAC stand for, and what does it do? I would appreciate some tips on how to diagnose the this problem...

Thanks,

Hanif.




Follow Ups:


[ Follow Ups ] [ 7-series (E23) Message Board ] [ Msg. Board FAQ ]
Questions, comments, or problems, please visit the Roadfly help desk.
Roadfly.com Logo © 1997 - 2009 Jump Internet Inc. All rights reserved.