Making knocking noise - 3Com Computers & Internet

A knocking noise coming from the rear roller of a Urevo treadmill can be caused by several issues. The following are some troubleshooting steps you can try:

1. Check for loose bolts: Make sure that all bolts and screws that hold the frame and the roller in place are tight and secure.
2. Check the belt tension: Ensure that the belt is tight enough. If the belt is too loose, it can cause knocking and other noise issues.
3. Check the rollers: Make sure the rollers are not worn or damaged, as they support the weight of the belt and can affect the alignment of the belt.
4. Check the deck: Make sure the deck is not damaged or worn, as this can cause noise issues as well.

If the noise persists after trying these steps, it's best to stop using the machine and seek assistance from the manufacturer or a professional repair technician. Using a machine that is making a knocking noise could potentially be dangerous and lead to further damage.

It will make the engine run rough and shake which could make noise in the hood area. A true engine knock usually is related to a bearing that is wearing out causing a noise. An engine will knock , spark knock, if the fuel is not of the correct octane or the timing is too far advanced. If a piston collects to much carbon from running too rich then that carbon can come in contact with the cylinder head causing a knocking noise.

Knock Sensor contains no moving parts and can not make any noise. It only detects noise in the engine block to allow the engine control computer to make adjustments as needed.

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Based off what you have described your Frigidaire refrigerator's icemaker is making knocking noise. This could be due to your water valve or motor. Since it is difficult to pinpoint the cause of the knocking noise I would suggest having a professional technician out to perform an accurate diagnosis. This will help you avoid any unnecessary part purchases. Good luck. -Matt

have the timing checked if its off it could be pre-ignition which some people describe as a knock. if its a heavy knocking noise it could be a piston noise or it may even be a bad crankshaft/connecting rod/bearing. have the oil pressure checked this may help to know what to do. some people describe a rocker noise as a knock but its more like a ticking noise at the top end in the area of the valve covers.

knocking noise as in rod knock? or knocking noise from a fan blade hitting the fan shroud?

Listen to the engine, if the noise is down low it is rod if it is up high it is valves. IF it is rod knock it will eventually throw the rod.

I have the same car, but my engine makes the knocking noise after I turn it off for about two seconds. Has this happened to anyone else? Dealership says it's normal. All this cars make this noise.

No it isnt a knock sensor the knock sensor job is to detect a knock noise and ****** timing. The knock that it is looking for is from octane or fuel or pinging that creates N0X s. A pollution gas. The knocking noise that you are hearing is different. If it is a multiple noise ar a rattling sound that will be the valves. There are other noises like a piston knock this knock is a sharp metallic noise, If the knock occurs only on acceleration that noise is a crankshaft noise. You need to check you oil level and make sure it is corrects. Look at the oil condition do you see silverish or whitish condition,is the oil deep black.

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