What would cause an engine to make a loud knocking sound once every 3 seconds while in park or neutral?
The failure to step on the brake pedal
or if manual the failure to step on the clutch
The transmission or gearbox is not working properly
What would cause a loud knocking noise coming from the engine at 70 mph and make the truck shake very badly?
It may be map sensor but engine knocking cause of another reason. You should check your spark plug , I.S.C valve , Injector and engine Compressor. thanks It may be map sensor but engine knocking cause of another reason. You should check your spark plug , I.S.C valve , Injector and engine Compressor. thanks
Low oil or low oil pressure, bad oil pump, clogged or gummed up lifters or even thin oil can cause low oil pressure. All the possibilities mentioned can cause the engine to be starved of lubrication. Which in turn creates friction that heats the metal engine part so that their tolerances change. Change in tolerances between two parts can cause knocking with increased heat from this friction.
Engine oil does not cause a engine knock. It is caused by pre-ignition, which can have many causes, including the wrong grade of fuel octane. Make sure that you are choosing the correct fuel for your vehicle. You may want to take the vehicle to a mechanic, as engine knocking can seriously damage your engine.
Will your engine knock if your try to drive it and you have a blown piston ring on a 1988 Chevy Silverado?
A bad ring would probably chatter in the cylinder and cause serious oil consumption. Knocking would most likely be either bearings (typically rod) or piston slap which is a common trait of a 350. Piston slap isn't serious as long as it clears up within a few seconds of starting the engine. Rod knocking means you get to rebuild/replace the engine or wait for a rod to go through the side.
Not sure what your asking exactly. But I will tell you this about knocking in Montanas. I have seen a few of them that will start sucking oil into the combustion chamber through a leaking intake manifold gasket. The motor goes dry enough to cause a knocking on the lower end of the engine. End of motor! Check your oil!!!
1999 Chevy blazer there is a knocking coming from the engine when it is in idle and when you accelerate the knocking gets louder and faster. What could cause this to happen?
they are the same thing. "knocking" in an engine is the fuel igniting from the heat of compression of the fuel and the air together. in a desel engine this is how it is suposed to work because it has no spark plugs so the only way to ingite the fuel is by compressing the fuel and the air by a ratio of about 22 to 1. in a gas engine the fuel is ignitied…
Heat shields often corrode and become loose but they usually cause a tinny rattling sound. Eventually they fall off as witnessed by the dozens of them found along highways. Mechanics often remove them (with your permission) if they are loose, because they serve no purpose other than to protect the technician from a very hot catalytic converter that he/she knows not to touch anyway. A "knocking" sound, however, is more likely caused by a worn…
What would cause a knocking noise from the top of the engine on a 1996 Mitsubishi Eclipse and how do you fix it?
What is the cause of a knocking from the front end of a 2000 Pontiac grand prix when driving at low speeds?
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.
== == 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.