Thawing Cooling System; Cooling System Recommendations; Coolant Recommendations For Volvo D13 Engine - PREVOST H3-41 Maintenance Manual

SECTION 05a: H3 SERIES COOLING SYSTEM
CAUTION
Do not run engine with the "Check Engine"
light flashing.
The level probe is mounted on the front of the
surge tank.
5.3

THAWING COOLING SYSTEM

If the cooling system becomes frozen solid,
place the coach in a warm area until the ice is
completely thawed. Under no circumstances
should the engine be operated when the cooling
system is frozen, as it will result in engine
overheating due to insufficient coolant.
Once thawed, check engine, radiator and related
components for damage caused by expansion of
frozen coolant fluid.
5.4 COOLING SYSTEM
RECOMMENDATIONS
Always maintain cooling system at the proper
coolant level. Check daily.
The cooling system must be pressurized to
prevent localized boiling of coolant. The system
must be kept clean and leak-free. The filler and
pressure caps must be checked periodically for
proper operation.
The coolant provides a medium for heat transfer
and controls the internal temperature of the
engine during operation. In an engine having
proper coolant flow, some of the combustion
heat is conveyed through the cylinder walls and
the cylinder head into the coolant. Without
adequate coolant, normal heat transfer cannot
take place within the engine, and engine
temperature rapidly
therefore be carefully selected and properly
maintained.
Select and maintain coolant in order to meet the
following basic requirements:
• Provide for adequate heat transfer.
• Provide protection from cavitation damage.
• Provide a corrosion and erosion resistant
environment within the cooling system.
• Prevent formation of scale or sludge deposits
in the cooling system.
• Be compatible with the cooling system hose
and seal materials.
PA1615 Maintenance Manual All Series | Section 05a revised September 2016
14
rises. Coolant must
• Provide adequate freeze protection during
cold weather operation.
When freeze protection is required, a mixture of
suitable water and
adequate inhibitors will provide a satisfactory
coolant fluid.
Freeze protection percentage of antifreeze
down to: in mixture
-13°F (-25°C)
-22°F (-30°C)
-36°F (-385°C)
-51°F (-46°C)
5.5 COOLANT RECOMMENDATIONS FOR
VOLVO D13 ENGINE
Coolant mixture consisting of 50/50 antifreeze
and deionized water solution should be used
year-round to provide freeze and boil-over
protection as well as providing a stable
environment for seals and hoses.
When topping up coolant, use the same coolant
mixture type as the mixture already in the cooling
system. Do not mix two different types of
coolant.
Do not use antifreeze formulated for automobile
gasoline engines, these have a very high silicate
content that will clog the radiator and leave
unwanted deposits in the engine.
A decal (053487) located on the surge tank
provides information on recommended coolants.
Recommended coolants for Volvo D13
engine:
• Prevost
#685241
mixture);
• Texaco CPS#227998 (pre-diluted 50/50
mixture);
• Chevron CPS#2227805 (pre-diluted 50/50
mixture);
• Volvo
20358716
mixture);
antifreeze containing
40%
46%
54%
60%
(pre-diluted 50/50
(pre-diluted 50/50