I always wondered about this 'fix' & agree with others that it does....nothing. It ignores a fundamental law of physics: fluid pressure can only be generated/maintained in a system if the pump pumps against a restriction. If one of the passages connected to the system is 'open'....no oil going into it...then the pressure would drop.
Pretty sure this 'fix' was used for big blocks as well.
Pretty sure this 'fix' was used for big blocks as well.