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Loud clicking / tapping noise in rocker cover area of motor

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  • 34 Answers

What vehicle is this? Need more information to answer.

Posted on Nov 18, 2013

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Posted on Jan 02, 2017

redbeard00
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SOURCE: loud tapping/knocking noise from fan belt/rocker cover

Do a compression test first.find out where you stand with the engines condition. If you think its coming from the belt area directly, then remove the belt/s and manually spin and wiggle each pulley. Try to see if anyone of them have a bad bearing. Let us know.

Posted on May 09, 2009

  • 121 Answers

SOURCE: engine is making loud noise from rocker cover area. oil pressure

tapets or camshaft has gone, check them out before you start it again

Posted on Jun 06, 2009

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SOURCE: losing power,tapping noise in valve cover. could

could be bad lifters or loose rocker arms, bad oil pump or low on oil, possible bad cam (but not likely)
first thing i would do is check your oil real low oil will cause this
if oil is fine check for oil pressure if oil pressure is low assume bad oil pump
if oil prssure looks good look for bad lifters or loose rocker arms

Posted on Mar 06, 2011

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1 Answer

I have a 2004 ford f150 making a tapping noies can it be the cam phasers going bad


check oil level ---yes it can but tapping noise can be a lot more reasons --worn oil -low oil pressure--low oil level--rocker loose-worn or damaged lifter-worn damaged valves --timing chain --water pump--pulley --really anything can cause a tapping noise --try to isolate the area or sound and diagnose problem

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I was quoted $500 to replace all the lifters. Is this a good price?


That is a ridiculously high price to replace lifters on a 4 or 6 cylinder engine. On the Mitsubishi 4 cylinder motor, the only thing that is needed to do is remove the valve cover and remove the rocker rod. (2 rods which hold the rocker assembly.) Next is remove the lifters from the bottoms of the rockers and pop in the new ones. Be sure to soak the new lifters in oil for 24-48hrs prior to install so they are pre-filled before install. Replace the rocker assembly and torque down to specs. replace valve cover and then start the vehicle. Check that there is no loud tapping noise and do not race the engine until the lifters have pumped up with engine oil. You should replace oil and filter for this engine work as well.

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Either a load tapping or a clicking sound wen the engine is running some said it was the main bearing so i need to replace the motor but i think it might be a bent push rod my car run fine but only with...


Bearing noise will usually stop after the oil pressure builds up, unless they are really bad. And then they usually screach. You may have a bad push rod, lifter or rocker arm. Try to locate which side it is comming from and remove the valve cover. The one in question will be sloppy. You can fix the rocker arm and rod from here. If it is a lifter you have to remove the intake manifold.

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Most likely cause is a hydralic tappet. Mits are well know for top end noise. Note we are talking about a tapping or clicking sound not a knock. You can try using an engine flush product if the noise is getting bad and then changing your oil. Generally if the oil is not changed regularily eventually the tapping noise gets happens.

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What motor is it? Some of the V-6's will always make the noise no matter what you do! Gotta love GM for this!

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tapets or camshaft has gone, check them out before you start it again

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Loud tapping/knocking noise from fan belt/rocker cover


Do a compression test first.find out where you stand with the engines condition. If you think its coming from the belt area directly, then remove the belt/s and manually spin and wiggle each pulley. Try to see if anyone of them have a bad bearing. Let us know.

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Remove the valve cover and rotate the engine and check to see if all the valves are opening the same amount. If not, you have either a bad lifter, bent pushrod, or cam going flat. Check your valve lash with the valves closed. You should be at 0 lash at all of the rocker arms.

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