sounds like the piston rings are worn.
When Exhaust brake is on squeak noise comes from the engine?"
Engine exhaust.
exhaust
No, the engine exhaust is what comes out of the tailpipe.
The strokes of a four stroke engine are intake, compression, power, and exhaust. The engine takes in the fuel, compresses it, uses it for power, and then the excess fuel comes out the exhaust.
It comes out of your exhaust, in the engine it combusts making your car propel forward, the vaporized gasoline exits your exhaust.
The black gunk that comes out of the exhaust pipe when starting the car is probably carbon buildup within the exhaust system. Carbon buildup happens when the engine is not burning fuel as efficiently as it can.
blue smoke comes out the tail pipe when your engine is burning oil caused by a worn engine.
It is in the exhaust pipe where it comes off of the engine on the passanger side.
if the noise comes from the front end while you rev the engine, and not alot of sound comes from the tailpipe, check the exhaust from the front back for cracks or breaks. it sounds like an exhaust leak to me.
engine coolant is getting into an engine cylinder , from a bad head gasket , warped or cracked head
The answer probably depends on what particular engine is being referred to, but the exhaust pipe comes to mind.