Yes, 12 years ago, Peter Molloy took my pump apart, expecting to have
to flow it. He checked the tolerances, casting, maching etc etc, and
pronounced it one of the best pumps he'd seen for a production engine.
I've heard one recent report to the contrary.
As I said, my DW oil pump experience is 12 years ago. Still running
like a beauty.
Best
Chris
Sent from my iPhone
On 13/06/2011, at 2:13 PM, Bob Spidell <bspidell@comcast.net> wrote:
> Has anybody vivisected a Denis Welch pump?
>
> bs
>
>
> On 6/11/2011 10:50 PM, richard mayor wrote:
>> A few months ago I bought a brand new oil pump for a fresh race
>> motor for the
>> 2011 season. It turned out to be a "County" oil pump. The bag
>> contained a
>> flyer that said something like "do not open this oil pump - the
>> gears have
>> been carefully matched - do not disturb".
>> Last week as I was assembling a fresh race motor for my 2011 racing
>> season, I
>> opened the oil pump to pack it with petroleum jelly (so it would
>> prime faster
>> on initial start-up) and I discovered two things. First, the
>> casting was so
>> bad that there was a big glob of aluminum sitting in the bottom of
>> the cavity
>> just before the gears ,where oil should be flowing freely. Then I
>> removed the
>> gears and saw that the inside of the housing. On one side, the
>> housing was so
>> bad that it was worse than an oil pump housing that had gone
>> through a
>> catastrophic engine failure. There were huge voids in the housing
>> wall that
>> should have been smooth as glass. This was worse than an old worn
>> out -
>> severely damaged - oil pump!!! And sold as brand new.
>> Some moron (in China or India?) had assembled this piece of crap,
>> perhaps
>> knowing, or not, that it was hugely defective, put it into a
>> plastic zip lock
>> bag and then added that warning flyer to not open up this pump.
>> Most engine
>> builders do not open up oil pumps when they do a rebuild. Sadly, in
>> today's
>> world this is what we get - "County" - for our Healeys.
>> BTW, I sell ACL engine bearings for 6 cylinder Healeys. but then,
>> so does
>> County.
>>
>> Richard Mayor
>> BN7L-466 Vintage Racer
>> Portland, Oregon
>> _______________________________________________
>>
>>
>
>
> --
> *******************************************************************
> Bob Spidell San Jose, CA bspidell@comcast.net
>
> *******************************************************************
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