[TR] TR4 Motor Mount replacement and potential redesign

[Darrell Floyd]

The TR4 motor mounts were indeed a problem.  When we took the 63 motor out we
noticed that the fan extension had a nice groove in it about 3/4 " wide and
3/8" deep.  It was So perfect that it looked machined into it.  Appears that
the motor had dropped and the fan extension had been riding on the steering
rack!  I am told that this was fairly common with the Fours.
Darrell

Sent from my iPad

> On Mar 20, 2014, at 2:27 PM, Will Daehler <will.daehler at gmail.com> wrote:
>
> So my eight year old motor mounts failed after just eight years. Getting
> the replacement (TR4A style) ones installed was such a bitch! It was
> awkward to line up the studs into the holes, and even more awkward to get
> the nuts started. I swore many bad words. And certainly don't want to ever
> do that again.
>
> I had time to look at the failure mechanism of the old motor mounts. The
> construction consists of an upper metallic piece, a rubber mid-section, and
> a lower metallic piece.
>
> It seems like the weight of the engine puts the rubber into sheer, and the
> mount tears apart. Looking at the failed mounts from the side, the upper
> stud no longer is in line with the lower stud. They are now laterally
> offset. Still parallel though.
>
> The improved design (in my head) is to box in the rubber on the two open
> sides with more metal. That way the rubber would have to fight harder to
> sheer itself to death.
> Comments?
>
> Will Daehler
> 63 TR4 Powder Blue
>
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