Oil Pump Priming

[johnbron]

Wouldn`t adding the new oil over the top of the filter instead of through the dip-stick hole during an oil change prime the pump just the same as squirting oil into the primer holes with the small plugs . The primer plugged hole by the filter cap seems to open into the same oil galley that you can see inside top of filter housing. Just curious cause I just added 3-quarts over the top of the filter and got to thinking this would have the same result as pumping with a squirt-can in the prime holes.

[Ron L]

JB. When I rebuilt my '48, I pumped oil through that hole and she primed just fine.

[johnbron]

JB. When I rebuilt my '48, I pumped oil through that hole and she primed just fine.

Im sure that it will prime just fine using the prime holes but I am curious as why shouldn`t you get the same result by my previous question.

[Ron L]

I'm talking about the hole inside the filter cavity. So, as long as the oil doesn't just pour out the bottom, you could get prime by doing what you said as long as the oil found that hole!

[johnbron]

Oh!! OK Ron, I thought you used the outside plug holes. I had the filter cavity full to the top a couple times so some must have run into that top hole. It might not even need priming but I have never started it yet and I dont know how many years it sat not running.

[Jim Becker]

Putting the retainer bolt in the filter housing should slow drainage back to the pan. I would think filling the housing clear to the top a couple times would get as much oil into that passage as a lot of pumping with an oiler would.