Sarah : The gears in the BN1 pump are the same as the gears in the
gear pump in the 3000 Healey which specifies radial clearance between the
gears and pump body should not exceed .00125" to .0025", and end float
between .0005" and .002". (section AAA.1). That's what I use.
in my limited experience, I have noticed that the hardened steel gears
themselves don't seem to wear much, but the die-cast housing around the
gears does.
If you're goin' racin', I'd spring for a new pump.
Jim Smith
BN1 in CT
----- Original Message -----
From: "S. P. Carr" <scvc70@epix.net>
To: <healeys@autox.team.net>
Sent: Monday, May 22, 2006 2:11 PM
Subject: BN1 oil pump
> Good afternoon all,
>
> We're in the middle of a rebuild on a well-worn BN1 engine, and are
wondering
> how to tell whether the oil pump is any good.
>
> The service manual for my MG-TD gives specs. for side and end clearances
for
> those pumps (tho' we wonder how many people have a feeler gauge that can
> measure .0056 - .0064!), but we've not been able to find anything in the
> Healey manual. Advice, please?
>
> Thanks,
> Sarah Carr
> BN1 in Pa.
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