air pulsing back out the air filter hsg

[dieselbeef]

when its running I feel air coming back out the filter thru the little rubber duckbill looking thing. revs go up so does airflow. oils good.coolants good...tight valve? talked to a guy who messes with antiques and he said the 3 cyl dzls do that unless its really bad its ok...

that sound right..runs fine...should I lash the valves...got 3400 hrs

 

[DLTTrekkers]

That duckbill thing is doing its work the right way !

 

[Doc Snerdley]

All diesels have what is called reversion, that is the intake air pulses and blows back. As previously stated the rubber one way valve is doing exactly what is intended and dumping dirt from the air cleaner back out of the housing.

 

[dieselbeef]

thank god for that..i kinda had that idea but talked myself out of it...thanks guys....super good news! gonna repl the radiator and probly lash the valves anyways..likely never been done