[Supras] Vibration

[Jeff]

Maybe a bad wheel bearing?


----- Original Message ----- 
From: "Hacker J" <jonbhacker at yahoo.com>
To: "Bob" <bob at hairballcreations.com>; <supras at supras.com>
Sent: Monday, September 10, 2007 2:27 PM
Subject: Re: [Supras] Vibration


>
> There are couple of (long-shot) possibilities I can think of, although the
heat related part leaves me confused.
>
> 1) A broken motor mount might cause a weird vibration.  Easy enough to
check.
>
> 2) Bent halfshaft, or bad halfshaft CV joint
>
> 3) Loose or broken bushings in rear knuckle . Especially check the no.1
arm ball joint.
>
> 4) The pressure plate diaphragm can shift on a hard launch and knock it
out of balance. This is really only likely if you drag race or drive like a
maniac on the street! :)
>
> Jon
> 90T
>
>
> ----- Original Message ----
> From: Bob <bob at hairballcreations.com>
>
> Yep that is the one. I haven't pulled the front of a 7m down in years
>
> I still have to decide what maintenance to do.  The timing belt or keep
> chasing a vibration.
>
> Has anyone noticed a heat related vibration associated with the clutch?  I
> can make the clutch shutter a bit if I don't let off the clutch smoothly
but
> generally it works fine.
>
> The vibration appears above say 50 mph and is pretty bad around 70 mph but
> only when the car is warm.  Engaging or releasing the clutch doesn't
change
> it.
>
> I've considered the fan clutch but it is tight and it feels fine.
>
> I can shut down the motor and the vibration doesn't change noticeably. I
> guess I could remove the fan clutch for a short time to test this.  The
only
> problem is that I'm in Miami and it won't be until mid winter that I would
> feel comfortable that the car won't overheat.
>
> I know it isn't the driveshaft or carrier bearing, tires, rims or brakes.
>
> Any Thoughts or suggestions would be appreciated.
>
> Bob
>
>
>
>
>
>
>
>
>
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10:17 AM
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