Thanks, Hank. To clarify, the seal I need to replace is at the front of
the gearbox; i.e. the input shaft seal on my BJ8 gearbox. I'm pretty
sure that's the source of the leak--disappointing, since the rebuild
only a few years ago--because it smells like the MT-90 I use in my
gearboxes (I know, syn leaks, but this box probably has 10K miles on it
before it erupted). I also spent time and effort sealing the O/D drain,
since I initially assumed it was the source of the leak. Makes me wonder
if seal quality has suffered, like a lot of things. Pretty sure I
checked the input shaft for wear.
I'm about (re-convinced) to forgo a lightened flywheel, since it
apparently causes no harm (just have to remember to do it). I've heard
it can actually cause an engine to run backwards, which would be all
kinds of bad.
bs
On 6/18/2024 11:10 AM, Hank Leach wrote:
> The best way to stop run on is foot on brake, car in gear-It's not
> hurting anything and is recommended by the likes of Geoff Healey and
> others. Denotation has a worse effect on the engine.
> The downside of the lightened flywheel is a heavier clutch engagement.
> That said the heaviest part I ever picked up is a 100 flywheel. Egad,
> what a hunk of metal!
> -However the issues with the flywheel/cracked crankshaft can be traced
> to a lack of a front pulley dampener and that might be the better
> solution to the issue. It may in fact make dumping the clutch easier
> on the drivetrain, but not proven. Since your problem is with the
> front of the engine, I would address the seal replacement -felt if you
> are a purest -or yes, the modern solution fancy cover to stop drips on
> the floor. I collect my Healey oil in a small swimming pool I
> constructed to hold leaks, while in storage. Then some kerosene
> quickly cleans up the mess when the car is moved. Since they no longer
> oil the roadways, think of the benifit you are supplying to the
> asphalt in longer life. Hank-------------------
>
> From: "Bob Spidell" <bspidell@comcast.net>
> To: "Healeys" <healeys@autox.team.net>
> Sent: June 18, 2024 at 10:03 AM PDT
> Subject: [Healeys] Lightened Flywheels
> Listers,
> I know this one has been discussed--well, beat to death--but it looks
> like I'll have to pull my BJ8's gearbox/OD to replace a leaky front
> seal, so I'm thinking of installing a lightened flywheel while I'm at
> it. My main reason for considering it is to stop some pretty
> significant run-on ('dieseling,' which I get on my BN2 as well). I'm
> not totally comfortable with dropping the clutch in gear to stop it,
> and any performance improvements would be a plus. It just so happens I
> just caught an episode of 'Engine Masters' on MotorTrend TV, where
> they seriously reduced the rotating mass of an engine--an SBC, which
> is what they mostly do--and got some interesting results: more HP and
> torque, as measured on a topnotch dyno. The gains were shown primarily
> on acceleration which, intuitively I suppose, were greater when RPM
> was raised at 300RPM/minute vs. 600. Any constant speed increases
> weren't addressed as far as I could tell. The late, great Gary
> Andersen, who raced, said the main benefit was faster spin-up for
> rev-matching downshifts; anyone noted any other significant benefits?
> The 'Dyno Master' on EM said he'd seen timing chain failures with
> lightened flywheels; my main concern for both my Healeys has been
> reliability, with minimal maintenance required, but if it
> stops/minimizes the run-on I'd be happy. Anyone know how far you can
> go lightening without adverse effects? TIA, Bob
> _______________________________________________ Support Team.Net
> http://www.team.net/donate.html Suggested annual donation $12.75
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive/healeys Healeys@autox.team.net
> http://autox.team.net/mailman/listinfo/healeys Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/gradea1@charter.net
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Suggested annual donation $12.75
Archive: http://www.team.net/pipermail/healeys
http://autox.team.net/archive/healeys
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
Unsubscribe/Manage:
http://autox.team.net/mailman/options/healeys/mharc@autox.team.net
|