 Vaughn
"11th Year" Gold Supporting Member
Posts: 13560
Loc: Colorado Springs, CO
Reg: 08-08-04
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05-28-12 11:10 AM - Post#2230774
In response to chengny
Put the vacuum pump on the vacuum canister reservoir only. Disconnect and plug any other vacuum lines coming out of the vacuum reservoir.
Pump the reservoir down with your vacuum pump. IF it leaks down, even after a few minutes, replace the reservoir.
Check any vacuum valve for leakage. Keep in mind that some valves can be one way (only single input and single output), so test both sides. If it can't be pumped down one way but can be pumped down the other way and hold vacuum - it is OK.
Replace any valves that leak or don't function. You can determine what most valves do by where they are located - if the valve is sticking out of the thermostat housing, it probably changes as motor temperature rises. IF it is on the carb (for instance), it probably moves a linkage when vacuum is applied.
This is essentially the same advice as above, just simplified.
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drtyler (4)
