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Old 08-31-2010, 08:42 PM   #1
camaro12
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04 optra engine rattle

Hey guys and gals. I have a 2004 chevy optra. When starting the engine cold, I have an engine rattle that sounds internal. After about 30 seconds it starts to go away. After it warms up its fine. Its not a heat sheild noise, but more something internal. After driving it to opperation temp and sitting at an idle, I can hear it faintly. The last couple oil changes have shown no evidence of a problem (no metal in the filter). Any thoughts on this? It has 110,000km.

Thanks in advance
Brad
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Old 06-10-2012, 12:57 PM   #2
347stang
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Re: 04 optra engine rattle

I have a 07 optra that is making the same noise, was woundering what the fix was. Is it the timing belt? I have 180 thousand on the engine, bought it used and not sure when and if the belt has been changed.
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Old 06-30-2015, 07:52 PM   #3
Ronald GG
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Re: 04 optra engine rattle

My 04 does the same thing. I believe it to be the lifters draining oil, not totally sure. I've heard adding a little ATF in the oil and running it for short trip will clean lifters etc. Then change the oil. I am going to try it myself just before my next oil change.
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Old 03-07-2016, 07:25 AM   #4
rhandwor
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Re: 04 optra engine rattle

They sell a product for sticking lifters in the parts store. Just add it to your oil some people use transmission fluid.
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