Somerset Regal L4-151 2.5L (1985)
HAND-HELD VACUUM PUMP
2.
Use hand-held vacuum pump to apply 15" Hg (51kPa) vacuum to the vacuum break, (Figure 2) .
A.
The vacuum break plunger should move full travel. Apply finger pressure to plunger to see that it has moved through full travel. If not,
replace the vacuum break and adjust to specification. The labor operation time for replacing the vacuum break unit includes adjustment.
B.
The vacuum break diaphragm should hold vacuum for at least twenty seconds. If it does not, replace the vacuum break and adjust to
specification.
REMINDER:
The carburetor vacuum break is covered under the Five-Year/50,000 Mile Emission Control Systems Warranty. Refer the "Buick
Service Policies and Procedures Manual."
