answersLogoWhite
Car Sounds
Chevy Blazer

Is it normal for a car to make a knocking sound from the engine when idling?

167168169

Top Answer
User Avatar
Wiki User
2016-08-19 17:46:44
2016-08-19 17:46:44

No. It is not normal at all. Go to a mechanic and get their opinion. Engine knocks usually signify severe damage, and driving with it will cause even more damage. Always check your oil as well. Make sure it is clean and topped off. knocking can also sometimes mean you have the wrong octane but most of the time it means your tie rods or connecting rods are worn

A knock at idle however can only be bearings, it would be beneficial to get things looked at right away,

1

User Avatar
Wiki User
2016-08-19 17:45:27
2016-08-19 17:45:27

1

Related Questions

User Avatar

an idling diesel engine or snoring :]

User Avatar

NO it will not. If you have a knocking sound then you have trouble inside of the engine.

User Avatar

When the fuel in an engine cylinder ignites prematurely or unevenly to cause power fluctuations and a "knocking" sound. usually occurs when an engine is very how or improperly timed.

User Avatar

Engine knocking can be caused by numerous things. Having the incorrect spark plugs, carbon deposits on the cylinder walls, and being low on engine oil may all cause a knocking sound.

User Avatar

Mine did the same, mine was a motor mount.

User Avatar

can you elaborate? engine noise? stationary/moving? ticking, tapping or a definite knocking?

User Avatar

if the engine is knocking really loud you probably need to overhaul the entire engine or get a new or used engine because loud knocking is not good

User Avatar

The first sign that your engine has thrown a rod is a knocking sound that comes from the engine when it runs. if you pay close attention, you will notice that the knocking sound is rhythmic and increases or decreases in accordance with the engine's revolution per minute (RPM).

User Avatar

You'll most likely hear a knocking sound or squeaking of some kind

User Avatar

This is petrol to which tetraethyl lead has been added to reduce knocking in the engine. Knocking is when combustion happens at the wrong time in the engine cycle giveing a kind of metallic "ping" sound.

User Avatar

When you accelerate. you are putting presure on the main engine barrens. if they are going bad. You will hear this knocking sound. I don't know how many miles you have on this engine. But that's what it sounds like. But that's not all that can make this sound. You will have to tell more about it and when it started. Did it just start all at once? or did it start and then get louder?

User Avatar

Could be a rod knock. Your bearings slipping in the engine.

User Avatar

The Hummer H2 is a 2005 SUT with the 6.0L Vortec and a Magna Charger supercharger. It runs great with plenty of power, but I'm concerned about some noise I'm getting out of it. When I first start it up, everything sounds fine. After running a mile or so, I start to get a knocking sound. I only notice the sound when idling, not when running.

User Avatar

Locate the sound, if it is high up on the engine it will most likely be the lifters, pretty common with the 4.0, you can quiet them down by using oil additives, but if it is low it may be a wrist pin knock, this will also happen and get louder when driving, and should be dealt with immediately.

User Avatar

Mine and everyone I have hears makes a knocking sound at idle, I wouldn't worry about it unless it does it through the whole rpm or is really lowed

User Avatar

Depends on the sound of the knock. Could be main bearings or rod bearings.

User Avatar

The combination of fuel still being pumped into the engine and air

User Avatar

A loud knocking noise in the motor of a car at high speeds is most likely the engine. There could be another issue with the transmission if the knocking only happens at high speeds.

User Avatar

Mine was making a knocking sound and I filled it up with premium gas. Sounds crazy but it actually stopped the valves from chattering. Might try it on your next fill up. 93 Octane.

User Avatar

A hole in the muffler would cause a knocking sound in your muffler. A loose exhaust pipe can also cause a knocking noise.


Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.