motor mount washers - which way round?

[vreference]

Originally Posted by kodioneill

factory mount

Wow - really? I would never have guessed that; apparently, neither would the last people who dropped my engine. It actually does make perfect sense though; convex sides in gives you a progressive spring rate.

[pete917]

Has anyone got the TBS or excellence article referred to?

[DRACO A5OG]

I would say on the gear box orient the washers like this ( - ) to keep the shifting precise

On the motor mounts ) - ( to lessen the engine vibration.

Gear Box is more important for precision shifting.

If you don't like it, re-arrange. This will not harm anything, matter of preferrence but PAG designed it with this configuration ) - ( in mind.

[rokemester]

I will be putting drive train back in my car in a few weeks if all goes well. This is a great thread and I appreciate DRACO’s final word on this. I had my transmission mount washers oriented () and engine mount washers (). On my reinstall I’m going back to factory )( washer orientation. Also thinking of welding small 12mm nuts to bottom of engine cross bar to ease installation.

[HaroldMHedge]

Here's the TSB on the mounts.

[rokemester]

Nice post! Thanks!!

[fred cook]

Originally Posted by RWebb

here is the gist of it:

placing the washers with concave sides facing away from each other,
like this: ()
- results in better shift quality but more vibration.

placing the washers, concave sides facing inwards, like this: )(-
- gives the smoothest configuration but the shifting under load is not
as nice.
__________________
Steve Weiner

concave sides facing each other ()
convex sides facing each other )(

An easy mistake to make!

[Walt Fricke]

I remember that service bulletin. My '77 had them the old way )( --. The first time I had the engine and transmission out I reversed them. I wanted the mounts stiffer, though of course I couldn't tell the difference after I changed. Same with the stiffer Porsche mounts.

[generalsmirnov]

Thanks for this info and the TSB is super clear. I recorded a video of replacing the mounts as per TSB:
https://youtu.be/5ciEh9n06tY