I would put another newer pressure gauge on and recheck. The oil pump wears at
the gear/plate interface and this extra clearance allows bypass of the
pressure. At least that is how my memory serves me in my old age. The oil
regulator is designed to relieve extra pressure when the oil is cold and would
not affect normal pressure. A warm engine will only need 10 pounds per thousand
RPM to be in top operating condition.
Ron
>
> From: lou daly <lou_daly@yahoo.com>
> Date: 2002/02/13 Wed PM 03:51:55 EST
> To: datsun-roadsters@autox.team.net
> Subject: oil pump question
>
> my 66 shows low oil perssure on the guage
> quite low say 0 at idle and 5 at 2000 rpm
>
> i've run it for a couple of hours so far and
> after the original smoke cleared there is no smoke
> noticible and the engine sounds nice and smoothe a bit
> tappety but similar to my 70 which runs well and has
> reasonable oil pressure
>
> if i look in at the rockers i see a similar
> amount oily wetness on both cars
>
> good advice has told me to put a proper guage on it
> and change the oil and filter...
>
> my question relates to the pump itself
> it looks basically robust in the diagram
> can't imagine the main parts failing
>
> but what about the valve-oil regulator
> bits (diag.6 in the parts manual)
> looks like the spring could fail
> or perhaps some blockage could occur at that point
>
> is it likely that the pump needs changing
>
> is it possible to pull the pan get at the pump
> replace it without yanking the motor?
>
> thanks in advance
> lou
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