[Healeys] Parts from UK BJ8

Wed Feb 22 09:42:24 MST 2023

Word to the wise.
I recently installed a new County oil pump in my AH 3000. The
engine builder took the brand new pump apart to inspect and found a
significant amount of flashing from the housing casting inside the pump.
The pump housing was cleaned up with a small die grinder and reassembled.
The flashing was both impeding flow and could have easily come loose at
some point.

Oil pressure on the finished engine is good. Whatever pump you buy, take it
apart for inspection first.

Harold

On Wed, Feb 22, 2023 at 8:30 AM Kees Oudesluijs via Healeys <
healeys at autox.team.net> wrote:

> You do not want a higher than standard oil pressure for normal use but
> extra oil flow is never a bad thing in a hot engine. If you fit a high
> volume pump you will get a higher oil pressure and you have to reduce the
> oil pressure to standard by fitting a weaker spring or adjusting the spring
> tension if possible.
>
> Failing to do that may lead to the earlier mentioned damage to the cam
> wheel and perhaps some other parts.
>
> Kees Oudesluijs
>
>
>
> Op 22-2-2023 om 16:14 schreef Simon Lachlan via Healeys:
>
> I fitted the Welch “High Capacity” pump some years back. Gained some psi
> across the range. Only fitted because it turned up brand new and v.cheap on
> eBay.
>
> Anyhow, I dug up the attached which is rather long and rather above my
> technical skills or interest….I’d imagine it’s been around the block a few
> times so most of you will have it filed away.
>
> Simon
>
>
>
> *From:* Healeys <healeys-bounces at autox.team.net>
> <healeys-bounces at autox.team.net> *On Behalf Of *Bob Spidell
> *Sent:* 22 February 2023 14:08
> *To:* healeys at autox.team.net
> *Subject:* Re: [Healeys] Parts from UK BJ8
>
>
>
> This was news to me (from Roger Moment's new book; 'engine' section):
>
> "I have found new gear-type pumps to have one gear a few thousandths of an
> inch taller than the other, and neither with the proper clearance to the
> bottom cover plate. This required finding someone with a grinding table who
> could make the gears identical, and then also machine the bottom of the
> pump housing so that the proper end clearance to the cover plate would
> result." I would at least check this on a gear-type pump.
>
> The only knock on the vane-type pumps that I've aware of is that the
> resistance was so high it would cause the cam gear driving it to wear and
> eventually be stripped. I think this was addressed by adding an extra tooth
> to the pump driveshaft driven gear, hence lowering the torque on the gears.
> I have no supporting evidence offhand, but I recall reading this somewhere
> (now if I could just remember where I put my keys).
>
> FWIW, I have about 7K miles on the 'upgraded'--presumably
> rotary-type--pump from DWM in my BJ8 and my oil pressure is stable, and no
> metal in the oil. I believe the gear-type pump's gears are made of sintered
> iron; which I recall from long ago caused problems in some aircraft piston
> engines--Lycomings* IIRC--and I've never really trusted them since (though
> my Mustang GT with 475HP has a pump with sintered gears with no issues that
> I know of, but aftermarket vendors offer ones with machined gears for
> boosted engines).
>
> Side note: When my dad was a factory rep for Ford back in the sixties, he
> said owners would bring their cars in because 'The oil pressure drops at
> idle.' Possibly one reason why manufacturers went to idiot lights, though I
> suspect cost was the major factor.
>
>
> *
> https://www.knr-inc.com/shop-talk-articles.html?id=101:200110-lycoming-oil-pumps&catid=25
>
>
> On 2/21/2023 11:18 PM, Alan Seigrist via Healeys wrote:
>
> As I understand it, the rotary vane was much better for maintaining
> pressure at low rpms, which is good for a road car.
>
>
>
> On Wed, Feb 22, 2023 at 2:18 PM Ricchardd Mayor <boyracer466 at gmail.com>
> wrote:
>
> The rotary vane pump was used in the 100/6 - 26D - engines.  It caused
> many problems.  It is not suitable for any use, contrary to what someone
> may be trying to sell you.
>
>
>
>
>
> Richard Mayor
> boyracer466 at gmail.com
>
>
>
> On Feb 21, 2023, at 7:35 PM, Alan Seigrist <healey.nut at gmail.com> wrote:
>
>
>
> As I understand it, the rotary vane pump is superior for road
> applications, gear pump superior for racing applications.
>
>
>
>
>
> On Wed, Feb 22, 2023 at 11:32 AM Ricchardd Mayor <boyracer466 at gmail.com>
> wrote:
>
> Bob,  The brand name is “County” ….. not “Country”.  Whatever brand you
> buy just be sure it is the gear style oil pump.
>
>
>
>
>
> Richard Mayor
> boyracer466 at gmail.com
>
>
>
> On Feb 21, 2023, at 6:49 PM, Alan Seigrist <healey.nut at gmail.com> wrote:
>
>
>
> Not sure why but Longstone Tyres in the UK has crazy good shipping rates.
> It's not the same with anyone else.
>
> Generally speaking when ordering parts from the UK, it seems to add about
> 30% to the total price.  I have had better luck with DHL or Royal Post
> shipping for reliability of delivery in the past... seems customs works in
> concert with USPS & DHL (Deutsche Post) to protect USPS, so FedEx and UPS
> sometimes can get hung up in customs.  It may have improved, not sure....
>
>
>
> On Wed, Feb 22, 2023 at 3:31 AM <rfbegani at gmail.com> wrote:
>
>
>
> I have decided to replace my oil pump and my rear bumper.  I remember you
> all seem to say that Moss pumps are from country and are not satisfactory,
> and we should buy from the UK such as Dennis Welch.
>
>
>
> Also, have decided to replace my original real bumper because it is
> scratched and blackened in places.
>
>
>
> Also, as the pound is 1.21 to the dollar the parts from DM are almost ½
> price from Moss and others.  My experience with UK on buying Michelin Tires
> was great because freight charges via HM Post is very inexpensive and
> direct to my door.  Is DM freight similar?
>
>
>
> Bob Begani
>
> 67 BJ8
>
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