D
Group 177 Preventive Maintenance
W2001496
58
Check Radiator, Hoses, Pipes and Air Flow
WARNING
Do not remove the cap from the coolant surge tank
while the engine and radiator are still hot. Scalding
fluid and steam may be blown out by pressure if the
cap is removed while the engine and radiator are hot.
Note: This check is also considered Noise Emissions
Control Maintenance, which is required maintenance
for any Volvo vehicle. For further information on Noise
Emissions refer to “Noise Emissions” page 5.
Perform the check of the radiator, hoses and pipes as
follows:
1 Check the front area of the radiator package for dirt
and debris that hinders air flow.
2 Clean the radiator package with compressed air or
water pressure, blowing or pushing from the inside out.
Note: Air pressure should not exceed 200 kPa (30 psi)
for the radiator and charge air cooler cores.
Note: If there is damage to the cooling fins, straighten
them out so air can flow freely.
3 Check for fluid leaks on or around the engine.
Note: Inspect the mating surfaces, auxiliary component
attaching areas and hook-ups, hoses and pipes.
4 Pump up pressure in the relief valve, with the heater
controls open, to 75 kPa (11 psi). Leave under
pressure for five to ten minutes. Look for leaks, wear,
cracking and distortion on hoses and tubing.
5 Check the hose clamps for tightness.
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