Question about 2005 Chrysler Pacifica

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We have a knocking noise and beleive it to be a loose rocker arm. Can this be tightened and where is the rocker arm located

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I think its hydraulic tappets ,and either the cam follower is worn through or the oil hasnt been changed regular and its gummed up and will not adjust

Posted on Apr 25, 2010

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Ticking noise while in drive getting worse, been told that noise coming from bell housing?


Valve Adjustment

Print
The 4.2L and 5.3L engines do not require a periodic valve lash adjustment.
The 4.3L engines are equipped with screw-in rocker arm studs with positive stop shoulders. Because the shoulders that allow the rocker arms to be tightened into proper position, no adjustments are necessary or possible. If a valvetrain problem is suspected, check that the rocker arm nuts are tightened to 18 ft. lbs. (24 Nm). When valve lash falls out of specification (valve tap is heard), replace the rocker arm, pushrod and hydraulic lifter on the offending cylinder.

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There is no such thing as a rocker shaft. There is a cam shaft, rocker arm assembly, Rocker arm, lifter etc. If you are talking about the rocker arm assembly that bolts to the head, it is 58 Ft/lbs. If you are talking about the actual rocker arms, you tighten them till they contact the push rod and the valve stem and then you put oil control clips on so the oil does not spray and you start the engine. You tighten them down till the chattering noise goes away, then back them off 1/8 to 1/4 turn.

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try to get # 3 out its probably just seized. and yes push rod or rocker arm could cause this but i would try to tighten to torque specification first.

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this may be due to worn engine bearings , this would be like a knocking noise, a tapping noise could be worn lifter or rocker arm adjustment.

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A rocker arm is the arm that sits on top of the valve stem and connects to the push rods 'the push rods sit on the cam so when engine is running, the push rods go up and down in a timed sequence and with the rocker arms, open and close the inlet and exhaust valves. the rocker arm is located inside the valve(rocker)cover .If the rocker arm gets loose or comes out.
Check the nuts on the shaft which holds the rocker arms.either the shaft or nuts are got loose.They need to be tightened.Don't make it too tight or too loose.  Too tight,and they don't flutter right. Too loose,and they allow the rocker arms to wiggle out of whack. Other possibility can be  something is broken, bent, collapsed, or out of adjustment. 
Thanks. you can rate this solution and show your appreciation.



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Engine noise that makes my 2002 Saturn Vue V6 AWD sound like a diesel. Could it be a rocker arm that needs adjustment? If so, what repair cost am I looking at?


it could be a rocher arm, or it could be the timing chain tensioner, mostly it the rocker on those they make it sound like the motor is going to blow, to have the rocker checked and adjusted i beleive is about $180.00. good luck.

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Pontiac sunfire valve noise


If it's a ticking noise that speeds up with the speed of the engine, it's a worn valve lifter.
You can try tightening it down by taking the valve cover off and tightening the bolt on the rocker arm, but don't tighten it too much, you will end up with other problems.

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You have a Lifter and Rocker Arm Tapping. You will need to Take off the Valve Covers and Listen for the Tap. When you Locate it Tighten Down Until it stops and then Back it off 1/8 of a Turn.

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Roker Arms


sounds like your lifter are damaged if your rocker are loose you may need to replace cam and lifters

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1 Answer

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