We had the chance to work on a EJ257 recently that needed a bunch of help in the way of oiling modifications and overall clean up with updates on parts.
This assembly is featuring a set of Pauter rods, CP pistons (101mm), Darton Sleeves, ARP case bolts, SCE Gaskets & M14 Headstuds.
We started in by milling the case set to reset the main housing bores as they were severely out of spec. We then surfaced the case sets as this assembly had head gasket issues with not sealing to the Darton sleeves. After indicating the case sets in we could see the gaskets were not touching the middle of the bores which is why this assembly failed so soon. Next up was to pin fit both rods and pistons to gain correct pin bore clearance for the engine so it won’t gall the pins under load especially since this engine will see upwards of 800HP.
all aluminum parts were vapor honed in house using our VHT cabinet. We also did extensive oiling provisions to the case set and cylinder heads to aid in oil distribution as well as oil flow.
Everything went together really well and we love the final product!
