Aluminum engine mount failure! Pics inside.

[IsaacHayes]

bzopi: I do have a scanner! Tomorrow I will set it up and scan the spare one! I don't have a caliper so you'd have to measure the thickness of yours.

Any idea why there is that depression in the center?

[Azrael]

Interesting...my air filter has started to hit my strut tower again after I thought a poly insert fixed it. I better check to see I don't have this problem too. Even if I didn't break it, having a strong billet piece would be good insurance.

[IsaacHayes]

Azrael: Maybe your transmission mount is shot on that side? That would make more sense. That or the torq strut is shot.

[z34phoenix]

why would GM make a mount out of a metal that can fautigue so easy. atleast steel would have bent. guess they figure the rubber will wear first. but still all it takes is a small scratch for and vibration to get that scratch to propogate into a crack

[mcgavinz26]

Light weight. GM's about the only company that is still using iron blocks on the V6's, gotta make up the savings somewhere else.

[IsaacHayes]

The new mounts on the timing covers on the newer engines looks like the timing cover has a thin aluminum piece that you put 2 bolts in directly... If that breaks it's a lot more involved to replace!! Like here.

[mcgavinz26]

I was looking at that on mine and wondering how in the world that thing is "good" enough to be the engine support bracket. Either way, I won't be using it, so no worries here.

[IsaacHayes]

Going with the old 3100 style mount or some other lower mount for the Fiero?

[IsaacHayes]

Not sure if not having the crack there or the fact that the top rubber mount I put on is in better shape, but the car has NO slop. Before you'd feel it a little when you hammered it. Now it's smooth, you can lock it in 1st and accelerate and let off and not feel anything. And the car feels really fast, probably because the big rain we had washed all the ice melting chemicals off the road. Last night was the first time I saw the roads dry in a long time!! (ice melting chemicals draws moisture out of air and becomes slimy slick snot).

Brad I'm scanning the mount now. I will try to email it to you.

[tractorman]

If breakage became a real problem, it'd be easy to make a steel one.

[IsaacHayes]

New mount is holding up so far....

Brad did those scans work ok?

[ForcedFirebird]

If you have a big enough scanner, take your spare one and scan it in and save it as a PDF. Then email it to me. I can then recreate it as a CAD drawing and send it on to FF. I can also verify I have the right dimensions by going out and measuring the one in my car.

I believe that the Mastercam 8.1.1 I have can convert it. That would make production much easier

What is the file suffix?

[bszopi]

Yeah, they worked, but I just haven't had a chance to draw it up yet. I'm heading out on a business trip today, so I'll have some free time at the hotel tonight to go it.

As far as the file extension, it will be DWG unless you want something else. But I've messed with Mastercam before (v9 IIRC) and it was able to convert DWG files.

[bszopi]

Well, I don't have anything here at the motel (in NM) to verify measurements to, but here is a pretty picture for you to look at...

[IsaacHayes]

Hahha nice! The depression isn't needed BTW.. No idea why it's there.... Not having it wouldn't cause a problem and is less machining...