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My 1997 900 started making some odd metallic vibrating noises over the past couple of days, especially while letting out the clutch or making right-hand turns, which reminded me of the noises it made the last time the right-hand engine mount went out.
When I replaced that mount a couple of years ago, Orio was selling ProParts mounts since the original German supplier has apparently stopped making them. They've since stopped selling even those, presumably because they're such low quality. In the time since I installed the ProParts mount, I found a NOS Saab OEM mount on eBay and had kept that around for the inevitable day when the ProParts mount would fail. That day came, but it failed in a way I hadn't seen before.
Typically those mounts sag and the bolt in the center disappears from view. In this case, the mount was still holding up the engine just fine, but the welds that attach the round metal part that encases the rubber to the bracket that bolts onto the chassis had all failed. The center section was free to rattle against the bracket. Due to the way the bracket was bent on the edges, it didn't seem like it could come apart, but it definitely made some noises. Interestingly, ProParts also changed the shape of the mount slightly, but for the worse, of course. It's much more difficult to get in and out of position, even with the engine lowered all the way onto the subframe. The OEM mount pops right in. Another interesting thing was that the bolt in the center of the OEM mount sagged down immediately after I removed the jack supporting the engine. It looks like ProParts used stiffer rubber in their mount that can better support the weight of the engine. Could this have been the one rubber product of theirs that was actually engineered well, but let down by lousy quality control? :roll:
When I replaced that mount a couple of years ago, Orio was selling ProParts mounts since the original German supplier has apparently stopped making them. They've since stopped selling even those, presumably because they're such low quality. In the time since I installed the ProParts mount, I found a NOS Saab OEM mount on eBay and had kept that around for the inevitable day when the ProParts mount would fail. That day came, but it failed in a way I hadn't seen before.
Typically those mounts sag and the bolt in the center disappears from view. In this case, the mount was still holding up the engine just fine, but the welds that attach the round metal part that encases the rubber to the bracket that bolts onto the chassis had all failed. The center section was free to rattle against the bracket. Due to the way the bracket was bent on the edges, it didn't seem like it could come apart, but it definitely made some noises. Interestingly, ProParts also changed the shape of the mount slightly, but for the worse, of course. It's much more difficult to get in and out of position, even with the engine lowered all the way onto the subframe. The OEM mount pops right in. Another interesting thing was that the bolt in the center of the OEM mount sagged down immediately after I removed the jack supporting the engine. It looks like ProParts used stiffer rubber in their mount that can better support the weight of the engine. Could this have been the one rubber product of theirs that was actually engineered well, but let down by lousy quality control? :roll: