Can you please explain your seft in more detail...
what causes aknocking sound on mazda T35 engine when its running
counterbalancer is bad
Mine did the same, mine was a motor mount.
The engine crackle sound in a car is typically caused by unburned fuel igniting in the exhaust system. This can happen when the engine is running rich or when there is a misfire in the combustion process.
could be the sound of the air being drawn in that's different ie carb'd systems with no airbox or if they are flat side carburettors, the rattling sound alone is enough to tell you its got flatsides or the engine is damaged.
the high pitched sound which I'm guessing is the whirring sound from the engine's turbocharger/supercharger. the sound comes when the impeller blades of the TC/SC rotates at very high velocity.... it's very similar to the sound of a jet engine but only on a small scale.
A restricted exhaust, possibly a plugged cataylitic converter.
Your engine probably has a vacuum leak
that's just the sound of the steel bits cooling down
Normally loose tappets will cause a ticking sound in the engine. Depending on if you have mechanical or hydraulic tappets you may need to have them replaced or simply adjusted.
If the sound lessens as the engine revs up, it could be the harmonic balancer. The rubber around the pulley could be bad. This is quite easy to see from underneath the car.
The combination of fuel still being pumped into the engine and air