swesna

did you snap the bolt when removing or putting it in? i am assuming when you put it in but just want to make sure bc I just took my motor mounts out. if it was in, then I need to be very careful with the torque.

thanks,
Steve

swesna

forgot to add...congrats on getting that out.

RayB_911

When I put it in with the torque wrench. The bolts must not have been as good as I thought and I may had had it set to high since I didn't find 1 torque recommendation for those. Easy to find for the 19mm nut. That was in my workshop manual. So I am thinks I went to far and bolts were 22 years old?

boxsey911

The two small bolts are only to keep the mount in place so there is very little torque needed. Just nice and firm or 23 nm as suggested by Thomas is plenty.

RayB_911

That's what I did. Car handles great

Glad we have this forum so I could learn about the mounts. What would I be doing if this site didn't exist? I know I would be driving this car with poor shifting or pay a pile of $$$ or €€ or ££ to have it worked on.

Thanks again everyone!

crg53

Take a good look at the bolt in post #10, it is easy to see that it was partly broken/cracked already, it was ready to let go.

RayB_911

Good eye. Makes me feel a little better.

ja78911sc

Ray,
I noticed in your pic that you used the OE 964 metal triangular tabs (washers). They fit in the OE 964 mounts but do not fit in the 993C4 mounts. I ground off the corners so they would fit in the 993 mounts. My guess is the washers are designed as a locking washer because they fit down in the grove not allowing the bolt to rotate.
Jim

RayB_911

Thanks for idea. I didn't want to use a different thickness and I didn't expect them to not fit. I did have to use washers on one for the LHS since the triangle wouldn't fit. I kept the spare triangle. I like the idea of making them fit. Never considered modifying them but I will likely do that now.

ja78911sc

Ray, pic of my modified washer, Jim

RicardoD

I did not use the 964 washer when I changed to 993 mounts. Oh no!

abarthguy

Same here when I changed to 993 mounts.....
Found a set of hardened thick washers in the drawer from a Fiat 600 headbolt. Works perfect and the car now has some Italian race parts !
;^)

RayB_911

Thanks for pic.

ja78911sc

Totally unacceptable

MOWMOW

Well, I just joined the club. I snapped the inner bolt on the right side MM. Happened on reinstall. 1/4 drill and #2 easy out plus 1 center punch and 2 beers later....
I thinks those M8 x 40 bolts develope stress cracks. I broke mine just hand tigthening.