Question about 2007 Kia Optima

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Knocking Engine My engine just started to knock . What can I do to fix it?

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  • 159 Answers

Need to have it repaired asap check oil level

Posted on Dec 29, 2013

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Posted on Jan 02, 2017

cjrepairs
  • 60 Answers

SOURCE: kia sorrento is making knocking sound in engine

it may be a recent or bad fuel purchase? but get it to a good mechanic before any expensive damage is done!

Posted on Aug 16, 2009

  • 346 Answers

SOURCE: engine knock

If your engine's knocking is indeed internal damage, you have worn/damaged bearings in either the mains or connecting rods.

Repair requires engine partial overhaul, and should be performed by a qualified service technician.

Posted on Dec 26, 2009

  • 1 Answer

SOURCE: Kia sedona. Knocking sound from Engine

I assume by now you have this problem fixed, but if not, or for the benefit of others looking for help, try replacing the coil on the #5 cyl as well as the injector. Ours did same thing, except fault code was on #2 cyl, so I got the parts from local parts store for about $150 total, and completed the repairs myself on my wife's 2003 Sedona. Now i can start on the rear heater issues, the knocking sound coming from the LF tire area while in motion, and replacing all brake pads. 92,000 on the odo. I'll spend the extra $ and go with the Honda Odyssey next time.

Posted on Jan 02, 2011

  • 68 Answers

SOURCE: my 2003 kia sorento 2.5

CHECK YOUR INJECTORS. U GOT A LEAK

Posted on Jun 09, 2011

christyler12
  • 94 Answers

SOURCE: kia 2.4 optima 07 engine makes knocking noise when I press fuel pad to move..I can't press fuel pad strongly the knocking noise increases more and may broken the rings

Sound like you have spun a bearing do to a blown head gasket. Does the oil on the dipstick look almost like a chocolate milkshake in color? If so your coolant has reached the oil pan and that can definitely cause the engine to spin a bearing causing a loud knocking sound.

Posted on Apr 03, 2012

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2 Answers

Engine lock up


You lost oil pressure, either due to oil loss or oil pump failure. When this happens the crankshaft bearings lose lubrication, heat up, expand, and freeze, or seize the engine. This is called lockup. The Kia folks lied to you about the safety of driving in this condition, or they didn't understand your description of it. Loud knocking inside the engine calls for immediate shutdown to avoid catastrophic damage. You are now looking at at least and engine rebuild, if not a full replacement.

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Henry, first need to determine if it's the actual engine that is knocking. Other accessories (water pump, steering pump, etc) could cause a knock. If the ECM knock sensor picks up a knock, regardless of where it originated from, will start to make timing and fuel adjustments which may cause it to hesitate or "sputter". You can take off the drive belt and start the engine. This will be the tale. If you hear the knocking, it's obviously in the engine and could be as bad as crank bearings or even the torque converter. Have you had any work done recently? If there is no knocking when the engine is running without the serpentine belt, you should now be able to narrow down the bad component by rotating each drive pulley until you find the damage..

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Sounds like your engine is out of time. Try timing the engine with a good timing light. Also did it start knocking after fueling? If so it might be bad gas.

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Somehow or another (missing or loosened oil pan drain bolt, excessive oil usage, etc), you lost oil and therefore, oil pressure. Running a car with little or no oil, even for a few seconds, most likely ruined your engine. The knocking sound means you probably threw a rod. Unfortuneately, the only fix is a major engine overhaul or a new engine. Sorry for the bad news.

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The knocking noise has to be a deep knocking noise if its the crank bearings . If the oil is very gooey the oil was never changed properly at the mileage or months as required. Also if the oil is thick as you state it must have 15,000 miles or more on this oil. 10,000 miles the oil will still be thin if never overheated. I suggest this engine be completely disassembled and inspected if you plan to keep it. You will find wear to more to it especially the cam shaft, lifters, rocker arm as so on. for the oil never lubricated the engine enough to save this engine

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Knocking when engine gets hot and car stopped


The fan clutch can make a knocking noise when it tries to engage. At idle it will have a rhythm to it when it tries to engage. You will have an over heating condition and the air conditioning may not work properly.

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Engine knocking,1998 safari awd It's the only way to fix bottom end removing the engine or it can be done just taking the oil pan down- Any suggestions thanks Top end was strip and inspected by machin...


sorry to say knocking usually a rod knock--wrist pin-bearings-which means removing engine-also the engine cradle and front end dont let u drop the oil pan to get to the lower end of the crank shaft

Oct 30, 2009 | 1998 GMC Safari

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I have 1998 Infinti Q45t 4.1L V8, It has 202,750 still runs great except you can hear little knocking sound when idling. Is that bad if you hav knocking sound from engine?? So do you think that we can fix...


a knocking sound in an engine is never good. with a high mileage engine things start to get worn. so bearing clearances get larger and things begin to knock and rattle. i would try running a higher viscosity oil than is recommended it might help with the knock. but truthfully it probably needs to be rebuild or a whole new motor installed

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