Leak down orfice

[pmanton]

What would happen if you grabbed the wrong leak down tester out of the tool box. IE: used the small orfice on a large engine or visa-versa?

To my way of thinking if you used the small orfice on a large engine you would possibly fail a good cylinder since the tester couldn't supply enough air to keep up with allowable leakage.

The opposite would seem to be true if you used the large orfice on a small engine. Too much air would be supplied masking a leak that should fail the cylinder/

Is my thinking correct?

Paul
Salome, AZ

 

[RV10flyer]

Sounds correct to me.

 

[Tom-D]

What would happen if you grabbed the wrong leak down tester out of the tool box. IE: used the small orfice on a large engine or visa-versa?

To my way of thinking if you used the small orfice on a large engine you would possibly fail a good cylinder since the tester couldn't supply enough air to keep up with allowable leakage.

The opposite would seem to be true if you used the large orfice on a small engine. Too much air would be supplied masking a leak that should fail the cylinder/

Is my thinking correct?

Paul
Salome, AZ

Yes..

 

[Sgtmac]

Yes to the fail

 

[BobThePilot]

I thought a leak down orifice was something else. My bad. So much to learn here!

 

[Tom-D]

Just remove that stupid orifice, and none of your cylinders will fail.