A "knocking" noise sounds like a bad connecting rod bearing. You may be ready to "sling a rod". These engines are famous for it.
Yes Knocking on people's door and running is Illegal
check to make sure the belt tensioner is functional if not it needs to be replaced
You may know your belt tensioner is bad if you hear unusual noises, such as squeaking or rattling, coming from the engine area, particularly when the engine is running. Additionally, if you notice that the serpentine belt is loose or has excessive play, or if the tensioner itself shows visible wear, such as cracks or damage, it's likely malfunctioning. Warning lights on the dashboard may also indicate an issue with the tensioner. Finally, if the belt slips or comes off while driving, it's a clear sign that the tensioner needs to be replaced.
Most of them move some but if your belt is squeeling you probably need to replace the tensioner.
3 MUST haves for an engine running. #1 - Compression #2 - Fuel #3 - Spark check to make sure you have these 3 first.
Running too lean.
Unless you can feel it running rough and knocking - no.
The knocking sound in your pipes when water is not running is likely due to a phenomenon called water hammer. Water hammer occurs when water flow is suddenly stopped or redirected, causing a shockwave that creates the knocking sound. This can be caused by loose pipes, high water pressure, or faulty valves. It is important to address this issue to prevent damage to your plumbing system.
the lifters
Have it replaced.
I just replaced mine because the automatic tensioner pully locked up (which from what I've found online was actually recalled though since I got mine used I was never informed) & melted the pulley & belt. The tensioner was about $90 & belt was about $40. All in all it took about 2hrs to replace both parts & get it up & running again. Good Luck!
This game played by children (and chld like adults) has numerous names all over the world. They certainly include both Knock Down Ginger and Cherry knocking and a hundred more names as well.