Vauxhall Omega Owner's Manual page 205

Anti-fr eeze a nd corrosion protect ion
Before the start of the cold weather season,
have the coolant checked for correct
concentration using a calibrated
hydrometer. We recom mend that y ou
consult your Vauxhall Authorised Repairer.
The a nti-freeze content must guarantee
frost protection down to approx. –28 °C . An
insufficient concentration will reduc e frost
and corrosion protection. Add anti-freeze if
necessary.
If coolant loss is topped up with water,
have the anti-freeze conc entration
check ed and add anti-freeze if necessary.
Coola nt level
Hardly any losses occur since the cooling
system is sealed and it is thus rarely
necessary to top up the c oolant.
The coolant lev el in the exp ansion tank
should be slightly above the KALT/C OLD
mark when the system is c old. It rises at
engine operating tem perature and drops
again when the engine cools down. If the
level falls below the mark, the coolant
should be topped up to a little over the
mark.
Allow engine to cool down before
rem oving coolant filler cap. Remove filler
cap carefully so that pressure can
escap e slowly , otherw ise there is a risk of
scalding.
Top up anti-freeze. I f no anti-freeze is
available, top up w ith c lean tap water. If
tap water is unav ailable, distilled water
can be used.
After topping up with tap or distilled wa ter,
have the anti-freeze concentration
checked , and anti-freeze added if
nec essary . Hav e the cause of coolant loss
remedied. We recommend that you consult
y our Vauxhall Authorised Repairer.
When closing , tighten coolant filler ca p as
far as it will go.
C ool ant temp era ture
For physical reasons, the engine
temperature gauge shows the coolant
temperature only if the coolant level is
adequate.
During operation the system is pressurised.
The tem perature may therefore rise to ov er
100 ° C.
If the temp erature g auge enters the red
(warning) zone or c oolant tempera ture
control ind icator W lights up, check the
coolant lev el im mediately.
z Coolant level too low:
Top up coolant. Pay strict attention to
the instructions given under "Anti-freeze
and corrosion protection" a nd "Coolant
level". Have the cause of coolant loss
remedied . We recommend that you
consult your Vauxhall Authorised
Repairer.
z Coolant level O K:
Have the cause of the inc reased coolant
temperature remed ied. We rec om mend
tha t you consult your Vauxhall
Authorised Repairer.
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