My brother caved in the oil pan on his 3800. Drove it several miles before he realized it had happened. I helped him pull the engine to check for bearing damage. He fixed the internal damage and buttoned it up without me. A few months later it has a hideous clattering noise at idle (but not under load).
I check the flexplate on a hunch. Sure enough, the 8 bolts on the back of the crank are loose. He had assembled it without any locktite.
So I helped him pull that motor a second time. And it wasn't even my car!

That was 2015, and he's still driving it now. So the rest of his work must have been good. But that was a good teaching moment.
I check the flexplate on a hunch. Sure enough, the 8 bolts on the back of the crank are loose. He had assembled it without any locktite.

So I helped him pull that motor a second time. And it wasn't even my car!

That was 2015, and he's still driving it now. So the rest of his work must have been good. But that was a good teaching moment.