Broken Timing Chain Guides - Leave in Oil Pan? NO!

[Strife]

I read on another board where a very tenacious 420 owner replaced his timing chain after discovering broken guides. There were still pieces in the engine. He started it up and the pressure was low. He dropped the oil pan and sure enough, there were pieces at the pickup. I know people have done this in the past with the 116/117 engine, but apparently, this is NOT a good idea. Worse, the problem seemed to come and go.