It's not a bad job, about 100.00 in parts. You need to drain antifreeze. Pull line going to tanks 1st and check for oily residue. If oily, rings are bad and time to exchange. Yes the compressor gets it's air from the head, when under a load you are losing boost through compressor and Unloader valve will let it escape through purge valve. Good luck.
W900 air leak only when driving
Discussion in 'Kenworth Forum' started by redgod7, Feb 2, 2015.
Page 2 of 2
Page 2 of 2