The crankcase breather is designed to vent oil-contaminated air out of the engine block. And when the breather in your car breaks down, the mixture will flow back into the engine directly or through the air filter. This, in turn, will spoil the optimum air-fuel ratio in the engine and lead to significant power loss.
Cross Reference For 164-6735
CATERPILLAR 164-6735 RACOR CCV55222-08 PERKINS SEV122/2
WIX WS10109 WS10117 DETROIT 2350486 DEUTZ 12300977
WAUKESHA 489605 FLEETGUARD CV55019
CATERPILLAR 275-2276 RACOR CCV55222-10