Originally Posted by
LivesNearCostco
Not normal but I can't think of a likely cause beyond what you've done. Could be failing strut mount rubber or the bearing inside the strut mount. Could be failed driver's side motor mount, but then you should also get a thunk when you let the clutch out in 1st or 2nd gear, as the engine rises up and settles back onto the failed mount. Perhaps loose reinforcement plate (or one of the 8 bolts) but I assume you removed and replaced that plate when replacing your FCABs.