Zenith ZPP 416 - Checking Coolant Leak; Radiator Cap Pressure Test

GENERAL EM -11
CHECKING COOLANT LEAK
1. Wait until the engine is cool, then carefully remove the
radiator cap.
2. Confir
m that the coolant level is up to the filler neck.
3. Install a radiator cap tester to the radiator filler neck
and apply 140 KP a (1.4 kg/cm², 20psi ) pressure.
Hold it for two minutes in that condition, while check-
ing for leakage from the radiator, hoses or connec-
tions.
NOTE
1. Radiator coolant may be extremely hot. Do not
open the system because hot, or scalding water
could gush out causing personal injury. Allow the
vehicle to cool before servicing this system.
2. Be sure to clean away any moisture from the
places checked completely.
3. When the tester is removed, be careful not to spill
any coolant from it.
4. Be careful, when installing and removing the
tester and when testing, not to deform the filler
neck of the radiator.
4. If there is leakage, repair or replace with the apropri-
ate part.
KD
PC001F
RADIATOR CAP PRESSURE TEST
1. Remove the radiator cap, wet its seal with engine
coolant, then install it on the tester.
2. Increa
se the pressure until the gauge stops moving.
Main valve opening pressure :
83 ~ 110 kPa (0.83 ~ 1.1 kg/cm², 12 ~ 16 psi)
Vacuum valve opening pressure :
-7 kPa (-0.07 kg/cm², -1.0 psi)
3. Check that the pressure level is maintained at or
above the limit.
4. Replace the radiator cap if the reading does not re-
main at or above the limit.
NOTE
Be sure that the cap is clean before testing, since rust
or other foreign material on the cap seal will cause an
incorrect reading.
Adapter
ECA9090A
ZENITH POWER PRODUCTS - 416