Cooling System; Check Of The Cooling System - Rotax 912 Series Maintenance Manual

3) Cooling system

3.1)

Check of the cooling system

Usually inspect all coolant hoses for damage by heat, cracking, wear and
evidence of leaking. Inspect all connections on cylinder head top- and bottom
side and on the water pump. Inspect expansion tank for damages. Inspect
protection rubber at bottom of the tank for tight fit.
Inspect the gasket of the radiator cap and check the pressure release valve and
return valve for proper operation. Refer to Chapter 12-00-00, para 3.4.
Inspect coolant with densimeter or glycol tester. If necessary, replenish with
coolant of same composition. Remarkably discoloured or thickened coolant
must be replaced.
CAUTION: Use only coolant according to the current Operator's Manual.
WARNING: Never open radiator cap when the cooling system is hot. For
WARNING: Always allow engine to cool down to outside air temperature
Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL
safety's sake, cover cap with a cloth and open slowly. Sudden
opening of the cap would provoke exit of boiling coolant and
result in severe burns.
before start of any work.
Severe burns and scalds may result if this is not respected.
12-00-00
page 14
Rev. 1, Jan. 01/2002