Originally Posted by EagleAutosports
If the oil isn't low, then it's either gas or coolant making the smoke.
What's the oil pressure like? It can be full of oil but if it's not being pumped then it'll knock.
Did it sound like rocks in a coffee can? That'd be detonation and it's usually caused by too much timing, too low of octane, or carbon deposits.
Is it a clank/clang that speeds up and slows down with the engine? That's probably a rod knocking and if it is, you better stop driving it because you could vent the block eventually. It also means a rebuild is in your future because it's beating a bearing to death.
I guess I would need a mechanical guage to really tell if the oil pump is going out or not. Right?
The knocking is only really present when I accelerate. If I was to guess I would say it sounds like rocks in a coffee can but if it was detonation, would it still smoke like it does? Also, I noticed that while driving, when I accelerate in gear, it knocks. But if I take it out of gear and and rev it up while driving, there is no knock. Does that make sense? Is there some reason why it would not knock while out of gear as opposed to being in gear?