It might be the supercharger going bad.
The supercharger has a little coupler that is located in between the supercharger nose and the main body. This coupler is located inside and once it starts to wear out it will start making a clunk sound. You can replace the coupler, replace the nose, or rebuild the whole supercharger. Thank you, From www.SuperchargersOnline.com
My 2000 Grand Prix would have a low-speed knocking noise coming from the drivers side as the CV axle was failing. The loss of lubrication in the CV Boots allows the joint to make a knocking/tapping sound at a low speed. If the knocking is coming from the engine compartment, then it could be an entirely different problem.
rear shock absorbers are a common fault
I found my noise wasn't something loose. It was the rear strut was bad. Was more of a load squeak that sounded like something knocking.
If you have knocking from the engine and smoke from the exhaust then you have far more problems than the car just not starting. Sick professional help immediately.
Having a bad rod bearing could cause a truck to make a loud knocking noise and shake when driving at high speeds. The engine having a coolant leak or an engine timing problem could also cause the knocking noise.
Internal knocking inside the engine is almost always a sign of worn bearings. Crankshsft, or rod bearing would be my guess. The fix, if it is internal, is overhaul. Before opening it up, make sure the knocking is indeed coming from inside the engine.
== == I do believe if you hear a knocking noise that your crank shaft could be failing. Which means you will need a new engine. Have it checked out. Replace the harmonic balancer they will make a bad knocking noise. When you start it and the oil light goes out and it knocks, this is what is wrong with it.
Noise coming from engine in Oldsmobile Cutlass could be as a result of an oil leak in the rear of your engine. This makes the gears to wear off leading to severe knocking noise.
it sounds like you have a major problem if the engine knocking is coming from the oil pan that could be a rod knocking. that means having to pull engine and spend a lot of money. good luck you may need it.
Macbeth wishes the knocking at the gate could wake Duncan from his sleep after he murders him, so he could continue to act innocent.
check heater blower motor blower wheel could be broken off The knocking comes from an Acctuator that has stripped out in the Hvac case. You Have to replace the acctuator to solve the problem.
if youre getting alot of white smoke from your tailpipe and if you hear a knocking noise coming from the top end of the motor could either be a rocker arm or a valve if it is knocking and the valve is bad the knocking will speed up as you accelerate valve are cheap and easy to replace anymore questions email me at utcbass_man@yahoo.com