Suzuki Samurai 1986, Service Manual

Page: 190 / 482

[Bi-metal vacuum switching valve (BVSV)]
NOTE:
For the rough check of the operation, BVSV
can be checked by warming up or cooling down
the engine without being removed from the
intake manifold.
The check procedure is the same as the follow-
ing except item 2) and 5).
1) Drain cooling system when engine is cold.
2) Disconnect vacuum hoses and remove BVSV
from intake manifold.
3) While keeping BVSV cool (below 53°C
(127” blow nozzle “3”. Air should not
come out of nozzle “4”.
1
2
I
II
Fig. Checking B VSV
4)‘While keeping BVSV warm
1.
2. Cool water
3. Blow air
(nozzle)
4. “No air”
(nozzle)
5. Thermometer
(above 65” C
(149°F)) in hot water, blow nozzle “3”.
Air should come out of nozzle “4”.
6
Fig. 5-3-54 Checking B VSV (2)
EG R modu latorl
1) Check filter for contamination and damage.
Using compressed air, clean filter.
1. EGR modulator
2. Filter
Fig. 5-3-55 Filter of EGR modulator
2) Remove EGR modulator and plug nozzle
with your finger. Blow air into another nozzle
and check that air passes through to air
filter side freely.
1. EGR modulator
2. Blow air
3. Air filter
Fig. 5-3-56 Checking EGR modulator
1. BVSV
2. Hot water
3. Blow air
(nozzle)
4. Air (nozzle)
5. Thermometer
6. Heater
5) Reinstall BVSV to intake manifold. Before
installing, wind sealing tape on its thread.
6) Connect vacuum hoses.
5-38