Question about 2002 Mazda 626

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Knocking sound I hear a knocking sound which appears to be coming from my engine. Could it be coming from my lifters?

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I'm actually at the replair shop right now and they are replacing both my CV joints because i'd heard the knocking sound and let it go too long.. It ended up wearing all the tread off my 2 front tires and exposed the metal. It seems to be relatively unexpensive from what i've been reading. DEF change your CV joints STAT!

Posted on Feb 27, 2009

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My solution to you is ask some one to check out your cvc joints cause once cvc joints go bad it starts to sound like your engines knocking but its the joints that are right next to the tire on the axel get under your car and look right behind the tire if there is a rubber here's a image of what the rubber on the axel should look like if its ripped or torn or even shredded thats your problem

Knocking sound - ts?t=15705397540890858194&pid=23104&ppid=18

Posted on Feb 03, 2009

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Is the oil level fine? if it is... then it could be the valve lash. see valve lash specs and adjust.

Posted on Feb 03, 2009

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1 Answer

2003 deville engine knocks at idle but when u drive knocking goes way down almost cant hear it


The knocking sound that you hear may be coming from lifters, crank bearings or piston slap. How old is the oil change, is there enough oil inside the engine, and is it due? How many miles are on this engine? All of these suggestions are normal with higher mileage vehicles. The only one that doesn't involve rebuilding the motor is the lifters. A lot of times replacing the hydraulic cams will fix lifter noise. I hope this is what you were looking for please write back. If you have any questions, let me know, good luck.

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I hear a knocking in the motor


not very specific, however, if it really loud, that may suggest internal engine damage...not good. also, if it sounds more like clicking which gets faster/slower depending on the speed of the engine, that would be you lifters = check oil = ensure correct level. or, switch to proper grade of oil if you have deviated from what the manufacturer recommends. it would help if you could tell me exactly where the "knocking" sound is coming from and what the vehicle is doing when you here the noise. oh, if it makes a knocking/pinging sound when you are under heavy acceleration or going up a steep hill (high load) check your spark plugs and try using a little bit better gas....

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It sounds like the lifters are draining down over night. When was the last time you changed the oil? A fresh oil change may do the trick, if not try some hydraulic lifter additive ( you just add to the engine oil)

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Knocking noise


If it is coming from the top of the motor, I would say it is a lifter tapping. If the sound is coming from the lower end of the motor I would say you have a rod knocking. If it is alifter you can replace just that lifter, if it is the rod I would consider a rebuild.

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Sounds like a lifter noise. worn lifters can't keep oil in them anymore so over night the oil leaks out. when you start the vehicle, you will hear a ticking noise or knocking noise till the lifters fill with oil again. only remedy is to replace the lifters.
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