For BPU what is recommended PHR modified or OEM?
Based on the below, will PHR modified Pump just cloak the fact you have an issue with your pump wear? due to the larger Drain hole preventing the pressure from building up behind the FMS
Originally Posted by Tricky-Ricky
OK in simple terms,wen the oil pump wears, especially on the front spigot area, it allows oil past into the very small void behind the FMS, this area has a small oil drain hole, which as std is not up to the job, the consequence of this is oil builds up at higher RPM and due to pressure overwhelms the oil seal,
The seal will very often look fine, all you will find is that the spring that is in the oil seal is displaced, but believe me it is almost always due to the oil pump.
http://www.mkivsupra.net/vbb/showthread.php?t=190940&highlight=fms&page=3