Common questions

Why does my car engine make a loud knocking sound?

Why does my car engine make a loud knocking sound?

Almost sounds like rod knock, but I just put the engine in and its been doing it since i first started it up. Only reason I havent pulled the oil pan yet is because I bought the engine from a reputable shop, it runs real smooth and it really sounds like its coming from the torque converter or flywheel.

Why does my GMC Yukon make a knocking sound?

If your GMC Yukon runs better after it has warmed up then it is likely that it is experiencing a vacuum leak in the intake manifold gaskets. It is not uncommon for…

What does rod knock sound like when you let off the gas?

When you rev up the engine, the pitch and frequency changes. At one point, it sounds like the knocking noise nearly disappears. When you let off the gas, it continues and maybe even gets louder. This is what rod knock sounds like. It doesn’t ever get better on its own, although when your engine is cold, the noise might be lesser.

What to do if torque converter makes loud knocking sound?

Put the front of the car up on jackstands, take the inspection cover off, turn the crank with a large ratchet and check out all the flexplate bolts..Turn the crank clockwise at all times…. kidwiththelaser likes this.

What causes a knocking sound in the back of a Ford Expedition?

This is caused by a faulty blend door or blend door actuator, which changes the temperature of the air that comes from the vents, so the issue may also be in conjunction with an inability to control the air temperature for the rear vents. Replacement of the blend door actuator is typical, but the blend door may need replacement as well.

What causes a sharp knocking noise in the engine?

Cam gear noise will usually be evident at a warm idle in neutral and sounds much like a loose timing chain noise. Piston pin, piston, and connecting rod noise are hard to separate. A loose piston pin, for example, causes a sharp double knock usually heard when the engine is idling, or during sudden acceleration then deceleration of the engine.

What makes the knocking sound next to the third row seat?

Share it! Knocking sound next to third row seat. The rear HVAC unit in the Ford Expedition is known to cause a knocking, ticking or clicking sound when the rear heater or air conditioner is activated.

Why does my transmission make a clunking noise?

If your transmission mount or engine mount becomes loose or breaks, you may hear clunking noises whenever you make a sudden change in speed or whenever you shift gears, due to the movement of the unsecure mount.

Author Image
Ruth Doyle