I discovered a few months ago when replacing the pilot bearing that my engine was not sitting correctly in the motor mounts...The block on the driver's side was sitting high in the mount, so that the screw was barely holding it in the groove of the subframe. So, engine sitting too high, which I had observed before but had not removed the air filter can (ti) to see the mount. So, explained why the engine sat high. I did not obesrve any cracks on the carrier, looks like someone has beefed it up in the past.
So since the mount was crooked from sitting high, I decided to replace the mounts. I had two NOS mounts on the shelf for both sides, were probably 4 years old, never used. I replaced both sides and drove maybe 200 miles or so and then... I noticed that the mount of the driver's side has split (sheared) from the top about 2/3 of the way through the mount. Like the engine was rocking to the passenger side and tearing the mount. Is there any way to install this "incorrectly" if its sitting true in the mount and the limiter on the passenger side is set correctly? Gearbox mounts are good, no issue there.
I was unsure whether the problem is NOS item (dried out), material failure (bad batch) or my bad (incorrect install).
Since its winter in the far north and I am doing a heater box rebuild, I can take my time in fixing this, but any input would be appreciated.
Andrew