B40 oil pump flow

[dougc]

I understand the pump is not a pressure pump but a sump scavenger, but I'm not sure how much flow I should be seeing. Its returning oil to the tank ok and plenty is getting to the rockers, but when I look in the tank there is just a constant dribble from the vertical return pipe. I've taken the pump apart and it looks to show no signs of abnormal wear. I'm spending a lot of money on new big and small ends, so I need to be sure they are going  to receive sufficient oil flow. anyone any ideas on how to check and test oil pumps?

[rhyatt]

Once the scavenge side has emptied the oil in the sump, it will constantly pick up a mixture of oil and air , hence the intermittent flow when you look in the tank.
There will be a solid flow from cold as it empties the oil that has dribbled down overnight , but once that is back in the tank , you will get intermittent again.
You're getting a good flow to the rocker banjo feeds , so must be plenty returning.