Quote Originally Posted by yapoy86 View Post
its normal sir.. the adbv is not a check valve or one-way valve.. its just a rubber flap to regulate the oil flow back.. more likely that your engine is over filled with oil..
no sir. when i changed the oil filter after resting the engine for 12 hours, the filter is almost empty, thus, depriving the engine during start-up which is the function of the adbv to prevent the oil in the filter to go back to the sump. it is not overfilled. isuzu 4jk1-tc engine has 7 liters of oil recommended.