27/3 test a pass or fail [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: 27/3 test a pass or fail


LbZ1031
03-29-2009, 11:52 AM
Just did a 27/3 test it is 53deg.out it failed right off the bat.. then to see what it would do when i took it inside. The oil that showed up went away. Now is it a pass or fail or a false reading... it was just a test to see what would happen. What do yens thank

Ace_of_Chaos
03-29-2009, 05:17 PM
A 27/3 test should be done with all components around 70 - 80deg, including ambient temperature if possible. Too cold, and you will get an immediate fail, too hot and it may pass when it shouldn't.