Prius (2004-09) :: Loud Knocking Noise When ICE Running And Car Is In Drive
May 5, 2014
I recently bought a 2007 Prius that is making a rather loud knocking noise that has me a bit perplexed. I know the noise is not normal as my 2005 does not do this.
The noise only happens when the ICE is running and the car is in drive
If the car is in park and you rev up the ICE the noise is not present. With that said I do not think the noise is isolated to something in the ICE as I think it would be present when revving the engine in park.
However is you put the car in drive and step on the brake (to keep the car stationary) while lightly revving the ICE the noise is present. The noise is present every time the car is in drive and you accelerating, even with the lightest of throttle.
It does not need to be under excessive load and with that said I am certain it is not spark knock/per-detonation of the fuel nor does it have the "pinging" sound like a spark knock.
If while driving down the road and the ICE shutdown down while driving at lower speeds the noise disappears. When the ICE starts back up the noise reappears.
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I have an 06 Beetle 5 cylinder, and just the other day, after getting a new battery and they installed it, when I'm driving and step on the gas into overdrive, it gets really loud, almost like a knocking or loud muffler that has a hole it it. However, it doesn't do this when I'm in park and step on the gas. Only in drive. It still has great power, but is loud now. I'm worried that the shop did something to mess it up, but they won't check it. There is enough oil in the engine.
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We have a 2000 Saturn SL2 (120,000 miles). Last night we drove to L.A. and back (from San Diego) , so about 250 miles round trip. For the last 45 miles or so we had the radio on quite loud. At some point in that 30-45 miles the engine developed a very loud knocking noise - like rocks being spun in a tumbler - which we noticed when we got off the free-way and turned down the radio.
This noise did not effect the way the car handled as I did not notice anything when the radio was up. We have been listening to a lot of sounds and I am concerned it could be a Rod Knock - it sounds a lot like this [URL] ... from inside the car, outside it was more of a constant pinging/thunking noise - less gravel sound.
So my quandary is this, our mechanic is not open Sundays so I cannot ask him, but when we take it to him tomorrow, do we drive it or tow it? If the rod is starting to go I do not want to inadvertently do more damage by driving it. The mechanic is 8-10 miles away. We can get their either on the freeway or through surface streets.
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Just had my 2010 F150 in for a loud knocking noise when the truck has warmed up in drive and rpm up to about 800. I can't hear the noise when I disconnect the passenger side vtc selonoid. The Tech who worked on it has recommended replacing the motor. His troubleshooting on the ticket says he removed the coil from the number 4 cylinder and the noise he hears goes away. I just can't see that the motor is bad.
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It sounds like it is coming from the Hybrid Drive. It is really loud. I can hear it as I drive down the road. The best I can figure out from reading forums is it might be some time of coolant pump the drive uses. It starts as soon as I open the door before I start it and it will keep doing it after the car is turned off.
I've posted a video with audio on youtube....
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5.4. So I have a 2004 F-150 that just passed 80,000 miles and a month ago it started making a very loud noise on startup, but only cold startup, meaning if I haven't used the truck in about three hours. Now I went on youtube to research and found a video of a truck making the exact same noise! Here is the link:
2004 f150 cold start knocking noise - YouTube ....
Need to verify what this is??? Some people are saying cam phasers and some are saying I'll need a brand new engine!
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When you turn the interior ac temperature from cool to warm there is a loud knocking noise coming from under the dash. I am new to working on explorers but it seem like its coming from the black box nearest the firewall above the transmission tunnel. When you turn it to cold the noise almost completely goes away. The noise gets even louder when you mess with the selector for "max ac" "head and feet" "feet" etc.
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So my 2012 plugin was parked for about 3 days, and when I turned it on, heard loud knocking and the check engine light came and stayed on.
When switching the car on or off, I'll hear two taps/ticks that were not there before. Loud knocking is not there now.
What can the issue be? It was very cold and snowing.
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I have a 2006 f150 it was making a knocking noise after the engine oil temp reached 160* and made the noise to 1700rpms. I thought it was the cam phasers so I replaced them. The truck is still making the noise and running rough and stalling but not as bad and not as often. Before it did it all of the time. The truck is timed properly. I had a new cam sensor and tried it but that did not work. I watched vct on the scan tool and both cams are in sycn.
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For the past few months I've been hearing a loud fan-like buzzing noise coming from the passenger side of the front of the car. I don't know that much about cars, but it almost sounds like the engine is racing or something is spinning too fast. It has gotten increasingly worse, and seems especially loud at high speeds on the highway.
It is not the heating/cooling fan - the noise is present when the heating/cooling system is turned off.
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it was warmer the day than it usually was so it dosnt make the noise as bad however there is usually a lot of clatter/knock from the engine when cold. does it at idle and while accelerating. it gets less once the engine warms up but has been doing it for a while. car has 93k miles and synthetic oil is used. there is also a metal rattle sound almost like a heat shield that is loose. idk if that is part of the engine issue or not. but it only happens in winter or when temps fall below 60 degrees. kinda hard to hear on the vid but its there.
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My car is making this noise. Its only at idle. Doesn't affect fuel economy, just alarming.
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To make a long story short, after replacing the timing chains, guides, and tensioners, the right side cylinder head began running very loud. Think of the usual chatter associated with these engines and multiply it. It was constant, from start up to shut down, and it increased with rpm. Thought at first it may be caused by debris in the oil clogging the lifter(s). After changing the oil multiple times along with different additives and driving roughly 600 miles, the noise persisted. Taking a look down the oil filler tube with a flashlight and with the engine running, the head looked dry. Safe to say at this point I was starving the head of oil.
Removed the valve cover. Removed the rearmost camshaft cap. Sure enough, the oil passage was completely blocked. Inspected everything and there was signs of running dry (minor discoloration, dried oil spots... but no real damage and no play anywhere. Put it all back together and the truck runs quieter than the day a bought it.
Here's the camshaft cap:
This is exactly what it looked like after removal. The material blocking the passage is hard and bridle like plastic.
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I recently changed my oil, transmission fluid, and both coolant systems. I have a 2008 Prius, and I can hear this noise coming from the engine when I accelerate between 50-70 MPH or have the cruise control on.
I had low coolant in the ICE system earlier (didn't know there were two separate systems) and I had the red triangle light up for a moment and "Problem" appear on the LCD screen followed by an orange thermometer. I pulled over and let it cool down, and babied it home and added coolant.
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We have an 07 Prius with around 150,000 miles on it.
A couple of weeks ago I noticed a slight knocking noise coming from the passenger front wheel area mainly when I was turning toward the right.
Question.......So when turning to the right, it first seemed to me that the right side would experience a heavier load. However, after further thought and applying some physics the inertia of the car would actually be putting a heavier load on the left side during a right turn. Which is correct?
Just trying to troubleshoot the noise/problem.
#1 when I apply the brakes, the noise doesn't change. I don't think it's brake related.
#2 the noise speeds up with speed, meaning that it's rotational.
#3 The noise does get louder when I am turning right but has know progressed into a constant noise going straight. During a left turn it subsided.
#4 I did take my floor jake and jaked the pass. front wheel up but didn't see anything broken or damaged. I couldn't rotate the tire though.
#5 I also had the tires rotated today and the noise got worse.
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I have a 2011 Kia Optima I went in for a routine oil change. a week later there was a noise a loud knocking noise and oil spilling from under my car I took it into the shop where I got the oil changed and they told me I thew the connecting rod in my engine.... Is it possible the oil change has something to do with this problem?
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So, I am driving, engine starts to knock, i stop, check oil, there is none.... I drive to nearest gas station, put in 4 quarts, still knocks but quieter. Drive back home 75 miles, knocking is incredibly loud. Had oil changed 2500 miles ago, no signs of leaking (Did they put oil in after draining? Hard to prove they didn't) By the time I got home, new oil was black. Is this an engine replacement or can it be fixed?
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I've got an 02 passat 1.8t that started knocking on me but its not all the time its only after it gets up to running temp. it will sit there an idle with no problem and run smooth. when you rev it up it starts to flash stop oil pressure. i have been running engine cleaner through it under a belief that it has become built up with sludge or carbon.
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Lately it has been in the 20's in my area and I've noticed on the first start of the morning the engine sounds very loud and produces a "knocking" noise that lasts a few seconds and then goes back to its normal loud idle. This only happens on the first start of the day...all subsequent starts in the day are fine. (mine is a 2007 model with the FSI engine)
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My car has 63 000 km and engine is making loud knocking noise all the time. Dealer took a quick look and he asked head office. Now he wants to run some tests to see which valve is bad. He's hesitating between repairing or replacing the engine. I'm really disappointed of Hyundai quality. I really hope that I get new engine instead of poor repair job.
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I recently started having a very loud knocking noise in my engine and I can't place it. Mostly due to my lack of car knowledge I can only trouble shoot so far. The following conditions are what I can really only go from:.
- when I'm in park or neutral the knocking happens in about 5 beats per second.
- while idling in gear it almost goes away.
- while driving it increases in frequency and intensity the higher the rpms, until it switches gears, then its dull until I get closer to topping out another gear.
- No real functionality of the car has changed.
- I tried doing a mild brake torque, in both drive and reverse, and the engine did not move.
- the knock is pretty hard to locate exactly but seems to come from the passenger side.
I'm hoping it's not to serious because I just filled the gas tank.
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