Best vacuum for troubleshooting light system
06-10-2019, 09:03 PM
#1
Intermediate
Thread Starter
Best vacuum for troubleshooting light system
I want to troubleshoot the vacuum system on my 75. Lights don't retract.
What is the best vacuum to buy?
What is the best vacuum to buy?
06-10-2019, 09:23 PM
#2
Le Mans Master
Member Since: Aug 2006
Location: mount holly NC
Posts: 6,987
Received 1,244 Likes
on
965 Posts
C3 of Year Finalist (appearance mods) 2019
06-11-2019, 06:52 PM
#3
Melting Slicks
Member Since: May 2015
Location: Cape Girardeau Missouri
Posts: 2,365
Received 427 Likes
on
377 Posts
The hand vacuum pumps are all you need. Do not use a motorized vacuum pump of the sort used for HVAC as they are FAR too powerful and can damage the rubber diaphragms and other LOW PRESSURE vacuum components!
06-12-2019, 06:56 PM
#4
Race Director
What about a vacuum cleaner? Lots of flow but less inches of vacuum.
06-12-2019, 07:32 PM
#5
Melting Slicks
Member Since: May 2015
Location: Cape Girardeau Missouri
Posts: 2,365
Received 427 Likes
on
377 Posts
Good luck making a leak-free connection from a vacuum cleaner to the system ;( Beyond that a vacuum cleaner is a high volume low pressure device. The vacuum system in your Corvette is low volume and low pressure. The difference between those systems is huge!
06-12-2019, 11:59 PM
#7
Le Mans Master
06-13-2019, 12:36 AM
#8
Team Owner
If your engine is operational, that is the best source for vacuum. The hand pumps and most mechanical pumps don't have the capacity of producing continuous vacuum level needed to diagnose these complete systems. The hand pumps are only good for detecting leakage in one [plugged-off] component at a time.