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2002 Chrysler 300M Question: constant engine noise

 

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momoftwins, 3.5L V6, Holden, MA, September 15, 2010, 13:27
 Rookie

There is a constant clicking noise under the hood when the car is running. Belts were just replaced. What is it? Car has 73,000 miles.

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  • Answer #1

    September 21, 2010, 12:12
     Master

    The 3.2L/3.5 liter engines are known for this belt noise. I have the same noise in my own vehicle, 2001 Intrepid 3.5L. especially on cold mornings. It goes away when the engine is warmed up. You can verify if it is the drive belts by spraying water from a spray bottle on to the belt. The noise will change momentarily. Replacing the belt will take care of the concern ONLY if it is properly tensioned. There is a special belt tension gauge that must be used when replacing the belt.
    Your local dealership SHOULD have and use this tool. Use belt tension gauge, Special Tool 7198 for conventional V-belts and Poly-V belts.

    Adjust the belt tension for NEW or USED belt tension applications. Refer to GAUGE. BELT TENSION CHART—3.5L ENGINES POLY-V BELT GAUGE
    Generator/Power Steering Belt (all engines) New Belt: 836 ±44 N (190 ±10 lbs.) Used Belt: 534 N (120 lbs.).
    V-BELT GAUGE Air Conditioning Belt (3.5L only) New Belt: 667 ±44 N (160 ±10 lbs.) Used Belt: 534 N (120 lbs.)
    As the belt wears, expect the noise to return. Another source of the noise can be the belt tensioners, pulleys, water pump, A/C, P/S or Timing belt

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    Visitor, September 27, 2010, 08:43

    Thank you so very much for your insight. I appreciate it. When I go for an glof, I hope to get it done. For now, I'll have to deal with the annoyance. It's not hurting anything letting it go is it? I have another couple of thousand miles to go. How about another one?

    There is a rolling of rocks sound at the front wheels, mostly on the driver side. Is that an indicator of needing new struts or shocks? Not that I know what struts are or how they might differ from shocks or even if this car has them or not or every car does. I know of the press on the hood and see if the car rocks up and down saying but I haven't done that. Sounds expensive? Thank you in advance again.

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