Hello
I have found out that the pulley circumference on the very early C-series
engines is larger. It was changed soon after the first six-cylinder BMC cars
were released on the market. The engine fitted to our car is within the first
1,000 C-series engines built and was supplied to the Donald Healey Motor
Company for their attention.
Believe me I would have preferred to rebuild the original pump, but a new
impeller could not be found. If someone has one I would be very interested.
Hoo Roo
Patrick Quinn
From: Chris Dimmock [mailto:austin.healey at gmail.com]
Sent: Wednesday, 1 March 2017 12:27 PM
To: Simon Lachlan
Cc: Patrick & Caroline Quinn
Subject: Re: [Healeys] Water Pump Pulley Circumference
Very comprehensive article Simon!
I bought a new pump back in 1998 when the car was rebuilt. When it failed in
2013, I dug out the original pump and rebuilt it, following the Mike Salter
instructions.
I found a NOS bearing, and used a modern seal. The critical dimension is the
impeller to body clearance of 20 thou.
Best
Chris
Sent from my iPhone
On 28 Feb. 2017, at 10:08 pm, Simon Lachlan <simon.lachlan at homecall.co.uk>
wrote:
Good idea, assuming it?s the press-on type.
Certainly, I?ve been led to believe that the County pumps are pretty awful and,
when my pump started to play up, I went the rebuild route. Didn?t seem worth
putting in a suspect part, especially one that is so vital.
Interestingly, when I was looking for pump bodies/pulleys that I could rebuild,
I was given a couple by a friend. Both were County; he?s on his third now.
I wrote an article for our local club?.waste of print as few, if any, of them
lift a spanner. However, I attach it herewith. You?ll see that I rely heavily
on Mike Salter?s good offices ie for info and for parts.
NOS pumps go for a fortune over here, unless you get one for a Wolseley or
Westie or the like. Then just swap the pulley. See article for more on
that???but I?d guess both of you are pretty skilled at scavenging from those
old BMC saloons that our American friends wouldn?t recognize if they were
parked on their lawn!
Simon
From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Chris
Dimmock
Sent: 28 February 2017 09:53
To: Patrick & Caroline Quinn <p_cquinn at tpg.com.au>
Cc: healeys at autox.team.net
Subject: Re: [Healeys] Water Pump Pulley Circumference
Hey Patrick, why don't you press the pulley off the old pump and reuse it on
the new pump?
The only repro water pumps I've bought are the BJ8 ones. They have a pulley
that just looks totally wrong. Too big & square sided.
Use the old one.
Best
Chris
Sent from my iPhone
On 28 Feb. 2017, at 5:32 pm, Patrick & Caroline Quinn <p_cquinn at tpg.com.au>
wrote:
Greetings
Today the new six-cylinder water pump for the BN3 arrived from AH Spares.
I have noticed that the ?within-the-groove? circumference of the new pump is 11
? inches, while the ?within-the-groove? circumference of the old (original)
pump is 14 inches.
Apart from the pump running a little faster I can?t see that it will make for
any other differences.
Does anyone have a pump they can conveniently measure please? Plus any comments
would be appreciated.
Many thanks
Patrick Quinn
Blue Mountains, Australia
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