Big Cam I 400 replacement oil pump

N-14’s , I was told when I had one, were described as a

“Low pressure, high volume “ oil system.

Is the 400 the model before the N-14?

@OLDSKOOLERnWV , @wore out .

 

They dropped the pressure with the BIG CAM 3. Oil pan, cooler, regulators and such all changed at the same time. I always put them back like they came unless I was using an older block to replace a 3 or 4 and then it had the entire updated oil system.
Those old regulars and by pass valves in the cooler are not going to work properly at 35 PSI.

 

You don’t want the old style high pressure pump…!

They did away with it for a reason.

Which oil pan you have, cast aluminum or stamped steel??

 

4 models before I thank.

 

He has done those things so listen to him. He is still running one!

 

They lowered the oil pressure on these engines due to “bearing wash”. The later models run at 40 psi and idle at 20 psi.

As far as helical gear teeth, even the early N-14’s had helical teeth, I own one. So all the pumps including the early N14 will work with matching components.

With the cast aluminum pan you should have a large suction hose from the pump along the outside of the pan to the pick up at the bottom of the sump. If memory serves me correctly you can unbolt the fitting on the pump “2 bolts” to allow the suction hose to hook up to the pump.

I use lubriplate No:105 to fill the cavity of the pump around the gears, will help the pump pick up the oil quicker…..