Only one way to check this!!! Line up the Top dead centre groove on one of the pulley's and on the other one there should be an 8mm threaded hole which lines up with a hole in the engine. If an 8mm bolt goes in, your belt is fine. Might be big ends, small ends. Hard to tell really.
YesYes
Engine mounts could be loose or worn.
Several things could make a carburetor backfire. The engine could be out of time. the carburetor could have a stuck float, or the engine could have a stuck valve.
could be your crank shaft
It could be a # of things, You need to have the engine scaned with a engine scanner. Some parts stores will do that for free.
Depends entirely on who makes the engine and how it's tuned. Could be anywhere from 4 -10 hp.
A clicking noise in the engine of a 91 Ranger could indicate a problem with the valves. A valve lifter in the engine may be worn or stuck.
It could be low oil pressure. Or it could be low on oil. Or it could be running hot. Or a fuel filter may be clogged up.
makes your engine better
check oil and oil pressure if good sell 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.
The biggest engine GM makes for vehicles(gasoline) is the 572