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Re: [Healeys] Flywheel Timing Marks BN1

To: "'Marvin James'" <britcrs@gmail.com>, <Healeys@autox.team.net>
Subject: Re: [Healeys] Flywheel Timing Marks BN1
From: "Brits'n'Pieces \(Eric Frenken\)" <lists@brits-n-pieces.com>
Date: Wed, 10 Dec 2008 17:26:42 +0100
Marvin,

my guess is that the vibrations are not drivetrain-related. Vibrations
occuring only at certain engine speeds are more likely to be engine-related.

Eric
Heinsberg/Germany
www.brits-n-pieces.com

 

-----Original Message-----
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
On Behalf Of Marvin James
Sent: Wednesday, December 10, 2008 4:27 PM
To: Healeys@autox.team.net
Subject: [Healeys] Flywheel Timing Marks BN1

When I rebuilt my BN1 engine I used a lightened flywheel that came with the
car (basket case). I don't know who did the machining of the flywheel but it
was nice work. The 1/4 timing mark had disappeared with the machining. The
rest of the engine machining was done locally by a machinist familiar with
Brit iron and having a good reputation. He also balanced everything. Right
after he finished my engine and before I assembled it he retired so was not
available for consultation.
My question:
What was the purpose of the original 1/4 timing marks? With the flywheel
balanced, why should orientation make any difference?
My problem:
I've got an annoying vibration that comes on about 1500 RPM and I'm looking
for ideas. As soon as I convince myself it's not the driveshaft (don't think
it is), the gearbox comes out and the flywheel and clutch cover plate will
be rebalanced. I may go back to the stock flywheel. Not excited about
tearing a car apart when I don't even have it together yet.
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