ive had just about every problem imaginable with my 5e build im now on my 2nd engine running 4efte sump with 5e pickup and no washer in the relief valve, i have also ran a 1mm thick washer in the old 5e and shortly after the oil pump failed and spun all 4 ill let you know how i get on with the new setup running stock 5e pistons(new) 5e head with 4efte valve springs thick 5e rods (same as fhe) on td04l, athena 1.9mm head gasket. hoping to run 1.2/1.4 bar ive done my research and there's no real reason why it cant be done?? Dean