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After driving my vehicle for 5 km or more a hear a sound coming from the engine sounds more like a knocking sound

When i start it there is no sound,i drive it around maybe for 5 km then this noise starts ,at first i thought it was low on oil and i added up more oil.Will getting a service done help cause i got it last week from japan

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There are two kinds of potential noises to be concerned about here. I assume the low oil pressure warning light is not on, or at least you did not mention it. When the engine is at operating temperature and at an idle, you may hear more of a "tick" sound with a frequency of about two or more ticks per second. This is valve train noise from either a mis-adjusted rocker arm or a failing lifter. However if after warm up, the noise is more of a "knock" and occurring at a frequency of half of the rate of a valve tick, or about once per second you have a more serious problem with a main crankshaft bearing or a connecting rod bearing. If this is the case adding oil will not help - the crankshaft is already damaged and the engine will require a complete overhaul.

Drain the oil and check for metallic particles - if present then there has been metal-on-metal contact somewhere in the bottom end and the engine has been damaged.

Posted on Nov 19, 2014

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6ya6ya
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Posted on Jan 02, 2017

tripletauto
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SOURCE: Engine noise cold

these motors made some noise when cold normally due to the clearance. Is it more than that? Have you tried removing plugs and soaking pistons overnight with topengine cleaner this will loosen carbon which makes some cold noise problems.

Posted on Aug 26, 2008

fixincars
  • 335 Answers

SOURCE: Hyundai 1998 Elantra Growling sound from front

You have a bad front wheel bearing on the left side because you say when you turn right the noise goes away, because when you turn right the suspension lifts up on the opposite side and releives some weight on the bearing causing it to quiet down. No it is NOT a DIY repair unless you have some pretty extensive tools. the quickest easiest and least expensive way to fix this is to go to a wrecking yard and buy a steering knuckle for the left. it will have a wheel bearing already pressed into it and all you have to do is replace the whole thing and you are done. do not open any brake lines or hoses to do this job just gently press the brake caliper piston back about 1/2" so it will fit over the brake pads when you reinstall.
please rate this advice a fixya if you feel I have provided excellent service.
email me with any feedback at fixincars@yahoo.com Thanks,Randy

Posted on Sep 17, 2008

tripletauto
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SOURCE: car won't start wants to turn over but nothing.

sounds like you have a blown head gasket this would explain loss of coolant and running poorly excessive smoke.

Posted on Nov 10, 2008

suterman
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SOURCE: I HAVE 02 TRAILBLAZER LTZ, AND IT JUST STARTED

Hello, I see you have a trailblaber with a knocking noise. It sounds like you have an electric fan clutch issue. Believe it or not your vehicle has an electric fan clutch. It looks just like the older non-electric but if you look on the driver side of the fan shroud that is the wire connector you see. It is an exspensive part just for the clutch but thats exactly what you are describing. It doesn't get louder just fast with rpms. Please rate my answer, Thank you

Posted on Mar 06, 2009

  • 1 Answer

SOURCE: RENAULT TRAFFIC 04

hi had same problem on a 04 reanult trafic 100dci changed the EGR valve but no success then changed the fuel filter and new seals and its been fine ever since hope this helps

Posted on Jul 10, 2009

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2 Answers

My car has a knocking noise when my car gets warm and looses power whlie driving.Does not have noise at start up only when I drive about 15 km the sound comes.


You say when it "warms up". The symptoms you are stating sound suspiciously like a serious overheating issue. The engine will clack loudly and lose most of its power when the engine becomes extremely overheated.

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There is a knocking sound in my engine


sounds like a rod is knocking, check oil to make sure it is full. If it has plenty of oil then if it checks out ok, you probable need new engine.

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Continued knocking while driving. Seems to knock faster as I accelerate, but does not knock at idle in neutral, starts to knock when reviving at 2200 rpms


Well lift the car up and put it on drive wile you can hear what the knock is. See if is your engine or the transmission. And if ok check your spark plugs make sure you getting fire to them

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Meloe77, there's a high possibility you have a mechanical failure inside the engie causing the knocking sound. (Check the oil?)
The reason for shutting off is because the knock sensor can hear it, and the powertrain control module (PCM, herefore) is trying to detune the engine to eliminate the sound, (as if it were caused by bad gasoline.) The fact that there is a mechanical knocking sound, means that the sound cannot be eliminated by detuning of fuel or spark mapping, therefore it starves for fuel and/or spark causing the engine to stop running.
My recommendation: Have the vehicle TOWED to a reputable mechanic and ask him if its possible that I'm right.

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Heard a knick-knack sound and then the engine shut


knock sensor is working at least right but unfortuanantly thats all that is working

it is likely a knock isue check the motor oil it is not un usual for a nisan to knock when the oil is low but on rare ocation it will kick so hard the knock sensor will activate

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I have a 1994 Subaru Legacy and It has started making a "knocking sound". Cked the oil, it was OK


knocks when cold ( Start ), then sort of diminish or disappears when warming up ???

Knocking goes faster when accelerating when cold ???

If Yes, then Piston knocking on the wall of the cylinder . The sound disappears as the engine is getting warmer it dilates and the gap gets smaller.

If this just started,

1. Put quality oil & filter ( Mobile Full Synthetic Oil & Mobile Oil Filter or Purolator )

2. Do not put cleaning agents mixed with oil.

3. Personaly i've put "Restore" Engine Restorer & Lubricant in cars with more then 200 000 km and the results are amazing. But only "Restore". My Volvo is at close to 300 000 km, and it runs great. It's not a cleaning agent.

By experience if the knocking just started you can put an easy extra 100 000 km on the engine before a rebuilt. Quality Oil & let the engine warm up ( 3 mins ).


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no i do not think its your tran. it could be a dust shield or a heat sheld came lose. it happen to me befor .and the car was fine. ok have a nice day

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