okay my friends teg gsr has a built head, type r pistons from all i know what he told me thats is. but his vtec dont engage, he has no oil pressure after and before a new oil pump, and also when he starts the car you can hear a little knock for a few seconds then goes away? what is this i know the motor has been rebuild and ACL bearings....could it be the bearings or the rods not being torqued to spec, he said they are but..... let me know guys thank you..