Honda Civic Wagon 4WD 1990 Owner's Manual page 94

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Condenser and Radiator
Check the engine radiator and the air conditioner condenser (in front
of the radiator) for accumulated dirt, insects or leaves. Carefully
brush or hose them off to assure maximum cooling performance.
CAUTION:
Radiator and condenser fins are very thin and easily damaged; do
not bend them with the high water pressure or brush.
Compressor Drive Belt
Check the compressor belt tension monthly, during periods when
you use the air conditioner a lot.
If the engine has been running, some engine components may be
hot enough to burn you.
When pushed with 98 N (22 Ib) of force midway between the
compressor drive pulley and the engine crankshaft pulley, the belt
should deflect about:
7.0- 9.0 mm (0.28- 0.35 in)
Have the belt adjusted whenever necessary.
COMPRESSOR DRIVE PULLEY
Air Conditioner Care
CRANKSHAFT
PULLEY