Question about 1986 Chevrolet Camaro

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Rattleing and knocking noise in engine when running. Fades in and out.

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Sounds like a main or connecting rod bearing is starting to go.Need to be more specific of when and how often it dose this.Also how many miles on engine.If your talking 100,000 or more its definitly a bearing.The more your run this engine (if its a bearing) the more damage your doing.Either way it dosent sound good.If this is a 350 or 305 engine if the oil wasent changed regularly these engines are known for bearing knocks.

Posted on Apr 08, 2011

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  • hye_in619 Apr 18, 2011

    Hello,

    We have a 02 town and country and had the knocking noise. So, we went ahead and looked at the bearings and they were all really messed up. Changed them out, but now we hear gurgling noise when accellerating. The sound isn't too bad when in idle, but if we give it a little gas, it sounds awful. What can it be now? What step should we take first?

  • btcavanagh01 Apr 20, 2011

    Stop running engine you are doing more damage.If you changed out bearings without resurfacing the crankshaft the bearing noise will go away but then come back worse afterwards.When ever you change bearings you need to inspect parts if there are real bad scores in bearings you will have damage done to the bearing surfaces.Usually you need to get a resurfaced or rebuilt crankshaft which will come with oversized bearings to make up the differance in the resurfacing.Good luck

  • Tim Terzich
    Tim Terzich Jul 06, 2011

    One of the first things I would look at is all the following
    belt or belts,belt tensioner, water pump pulley Power steering pulley, alternator pulley. I judgest an easy thing to try. Spray some WD40 on the belt tensioner .
    Just some easy things to try until we can have some more info.

    I truly Hope this helps.

  • Erik Meyouknow Oct 29, 2011

    Hello,
    I don't know if this topic is still open, but i've got a question, I don't know if this problem is answered yet, but I have a 1986 Chevrolet Camaro Z28 that only makes a knocking sound when running idle. As soon as the throttle goes down, de knocking sound disappears and the engine sounds pretty normal. I think it has the 305 engine, the engine has 35000 miles on it, but the oil was very low at one point. Before I dissasamble the whole engine, i would like some advice, if possible,

    Thanks

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