Toyota 4-Runner 1985 Repair Manual page 160

EC-60
COLD
HOT
Vacuum
EMISSION CONTROL SYSTEMS (CARB.) - Auxiliary Systems
EC3521
INSPECTION OF BVSV
CHECK BVSV BY BLOWING AIR INTO PIPE
(a) Drain the coolant from the radiator into a suitable con-
tainer.
(b) Remove the BVSV from the intake manifold.
(c) Cool the BVSV to below 55°C (131°F).
(d) Check that air flows from pipe
J
to pipe
L.
(e) Heat the BVSV to above 74°C (165°F).
(f)
Check that air flows from pipe J to pipe K.
If a problem is found replace the BVSV.
(g) Apply liquid sealer to the threads of the BVSV and
reinstall.
(h) Fill the radiator with coolant.
A03078
INSPECTION OF DIAPHRAGM
CHECK THAT CHOKE LINKAGE MOVES IN ACCORDANCE
WITH APPLIED VACUUM
If a problem is found, replace the diaphragm.