1991 Cadillac Seville - 1998 Cadillac DeVille - 2013 Cadillac XTS4
So, I have this very nice 1991 Seville with the 4.9L and of course, it has the infamous Main Bearing Thump. I have read so many differing opinions on this, so I stopped in at the local Cadillac stealership and talked with their 30+ year veteran service manager. He was more than familiar with the problem and basically told me to save my money. The so-called "fix" bearing that Cadillac came up with really does not correct the problem. He said that if I'm not going to change out the crank as well, I will be wasting my time and money. Does anyone have any first hand experience with this and should I just turn up the stereo and live with it? The car is nearly pristine and the engine runs very good, so I wouldn't mind putting some money toward this if it would indeed correct the problem.