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Chevrolet Impala, Sedan
#1232 of 2014 Cold Engine Tapping - Carbon on the Pistons
May 02, 2005 (7:45 am)
After years of driving 1980's vehicles, my husband and I decided to step up into the 20th century. We purchased a 2004 Chevy Impala (first new car ever)! Now we are wandering about our decision. Last December we noticed that there was a tapping in the engine when started in the morning or late in the evening in cold weather. We took it to our service center and was told that there was "Carbon on the pistons". They chemically cleaned our engine and said all was good. Later after talking with several people it raised a flag to us.. a new engine with carbon on the pistons? We contacted the Chevy Customer service who advised us to have another dealership look at the vehicle. Which we did. This dealership told me they should have never cleaned the engine, that carbon naturally burns off. Also because of the new design of the piston w/o sleeves, on a cold day there will be some natural tapping because the metal is warmed up.
So what's right.. what's wrong? Because here we are four months later and I have the tapping again.
#1233 of 2014 I have a 2000 with the same tapping noise...
May 02, 2005 (10:29 am)
Been there since maybe a year after I bought the car. The noise went away after i had an engine flush and switched oil to natural oil instead of synthetic, but came back within a few days. I would love to know what is causing the tapping. Otherwise, the engine is strong, car is great and only had one major problem which was still drivable from Lancaster PA to Brooklyn NY (upper gaskets leaked after ,80,000 miles and had to be replaced). Car is now over 110,000 miles, and running fine except for that damned tapping noise.
#1234 of 2014 Re: Security warning [2001impala]
May 06, 2005 (5:33 am)
I have a 2002 Impala with 52,000 miles. The problem your describing is exactly what I am having. I just replaced my alternator and thought that was the problem. A week later as soon as the temperature warmed the clicking sound returned. Now the security message light comes on when I leave work (on warm days). In the AM when cool no clicking and no security message? Any advise you can provide would be greatly appreciated!
#1235 of 2014 Re: Security warning [hatethiscar]
May 06, 2005 (5:54 am)
Did you ever get this problem fixed? I am heading down the same path. Security message comes on and I hear clicking sound under dash. It only happens on warm days, when it is cool everything is fine? Any advice would be appreciated!
#1236 of 2014 Re: Security warning [jimm7]
May 06, 2005 (6:15 am)
Has anyone experienced this problem or solved it?
#1237 of 2014 Re: Disp button does nothing [brucev]
May 07, 2005 (3:22 pm)
I sell Chevys here in Central Fl, and own a 2005 Impala LS. My experience is that you have to hold that display button in for longer than the 5 seconds it says in the manual, seems to me more like 15 sec, then you get a "settings" message on the radio and can begin to toggle through the various menu choices.
#1238 of 2014 Re: Security warning [kwhittum]
May 08, 2005 (5:59 pm)
Your BCM (Body Control Module) IS DEFECTIVE. I had the same problem and 364 dollars later the dealer had it fixed.
#1240 of 2014 Re: Security warning [revjim64]
May 09, 2005 (10:44 am)
Thanks, Friday afternoon the temperature outside was hot and sure enough everything was shutting down(radio, no AC). I went directly to my local Dealer in Rochester, they took me in and came to the same conclusion you did and replaced the BCM at no cost with only a little over an hour wait. They also agreed to replace or fix my sightly leaking anti-freeze, which has been widely discussed on this board at no cost. I have 52,000 miles and the car is a little over three years old. I can't help but wonder if their great response to me is a way of avoiding a much larger recall? In any event I went from being very distraught friday afternoon thinking I was heading towards dropping $1000 Plus on my 2002 Impala to being very impressed with either GM or my local Dealer! Thanks for your response. Spending a couple of hours reading this board has been a big help to me!
#1241 of 2014 Re: reply chrisis30 [pluto5]
May 09, 2005 (7:46 pm)
Why does the Impala engine use so much oil? Should I be concerned with an engine that uses that much oil?