[Healeys] Oil Pump

[Alan Seigrist]

Jonas -

The rotary vane is superior for a normal use vehicle, and is far less prone
to wear than the gear pump.  Low pressure is likely caused by a worn relief
valve spring or crud around where the pig sits in the block.  My guess is
replace the spring.  Even if worn, the oil pump will still produce
sufficient pressure, it just will take a tiny bit longer build up head in
the system.

Alan

On Thursday, March 6, 2014, Jonas Payne <jpaynepbr at cox.net> wrote:

> We are rebuilding the engine from a '61 AH 3000.
>
>
>
> While the tolerances on the old pump check out (per my machinist) , the
> owner of the car was complaining of low oil pressure (40 psi running, 20
> PSI
> at idle).  There was nothing on the top or bottom end suggested major
> problems to the main or rod bearings nor the typical rockershaft issues.
>
>
>
> Effectively, the cam and lifters failed and the valves and guides were shot
> on the motor.
>
>
>
> All of that said, there are some options for the oil pump as follows:
>
>
>
> Replace with new gear type - readily available.
>
> Replace with original style vane type - on backorder with all known
> suppliers with no delivery date in site.
>
> Re-use the old pump as is
>
> Obtain a re-built pump (I have no idea where I'd have this done)
>
>
>
> I was told that the gear type makes pressure at high rpm and the vane style
> at low rpm - if this is true, given this owner's driving style, I'm not
> sure
> that a high rpm pump is the best way to go.
>
>
>
> Jonas Payne
>
> PBR Consulting Services, LLC
>
> 702.882.6711
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