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Sedans Chevrolet Impala Chevrolet Impala Performance
36 messages, Last post on Nov 24, 2008 at 9:09 AM
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Replying to: quietpro (Mar 20, 2007 6:05 pm) |
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Replying to: wbowl99 (Mar 21, 2007 7:39 am) The manufacturer claims it's OK with the manufacturer's but I wouldn't take some guy's word on the internet.  Call your dealership or better yet, corporate and ask. Here is the web site for the maker of the additive: http://www.lubegard.com/automotive/trans_shudder_fixx.html If you do a web search for Dr. Tranny, you'll find plenty of places that sell it. With the ticking, you're not hearing it while you're actually driving are you? You're talking about after driving on the interstate and then coming to a stop, right? With the suspected rough engine, try a couple things. While stopped (and feeling the rough idle), shift into park or neutral and see if you notice a difference. Also, try turning on the AC. I've noticed with my engine (and most others), it runs smoother with a slight load on it. If I idle in neutral, mine has a bit of a rough idle. If it's in gear or in neutral with the AC engaged, it smooths out. I was actually gonna ask the other SS owners about that so if you're reading, let's hear your take. Does the 5.3L run a little rough in neutral but smooth as silk while in gear? Thanks all and get back with us, Wanda... Ron |
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Replying to: wbowl99 (Mar 21, 2007 7:39 am) |
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Replying to: quietpro (Mar 21, 2007 3:33 pm) Not really rough but it does sound like a bag of marbles on start up (not unlike the sound made by a slack top timing chain on an XK Jaguar). I'm wondering if this is due to an undue delay in oil pressure build up. Also, some time back I got a really noisy lifter tick after a start in cold weather. That seems to have gone now a few more thousand miles have been added. Martin
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Replying to: martin22 (Mar 21, 2007 6:50 pm) |
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Hi Guys... If I'm not mistaken here, all the '06 & '07 Impala models, including the SS, share the same hydralic roller valve lifters. Sometimes in cold weather, and/or when it's been sitting too long, you will hear a slight ticking sound on start up until all the lifters fill with oil. Just maybe..... Frank
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Replying to: mymitties (Mar 22, 2007 4:28 am) I have tried shifting it to park and other gears and it doesn't seem to make a lot of difference. I hear it more than feel it. It makes me wonder, though, if that is what is happening when I feel the shudder driving between 30 and 55 mph. Wanda
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Oh, and I have a couple new rattles I've heard the last few days from the glove box area. Thought maybe it was the couple CD cases in it so took them out. Still there. Leaned over and held the glove box door firmly with my hand. . . no more rattle. Seems to have gone the way of my hood latch and is loosening up. The other one is coming from the steering column and I've only heard it a couple of isolated times. (Guess they won't be able to recreate the problem on that one.)  I may just wait and hit the GM rep with this one as well instead of an extra trip to the shop. I'd like to take him on a trip down the hwys I drive and let him hear the wind, tires and rattles, and feel the power changes, etc. Wonder if he'd give up an hr of his time. They test it on city streets for the most part where you have lots of noise interference from other vehicles and the speed is lower so the problems are not as evident. |
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Last time I took my Impala out for a ride I thought I heard a slight metallic rattle coming from underneath. So, being a nice day here in New Jersey today I took her for a nice ride. Once at a light and once making a turn I heard that sound again. Nothing big, but I needed to know where and what it was. So, when I returned home, I crawled under the car (partly) being careful not to touch the hot exhaust system, I shook the system with a block of wood and , yes there was the problem!! The first bend in the pipe back from the muffler the heat shield was hitting right on that bend in the pipe!! So I waited for things to cool down and slightly bent that section of the heat shield away from that bend.....problem fixed!! Took it back out on another run and it was fine. It was just hitting very slightly, to the point that I don't think I heard it when the car was cool. The heat probably expanded both the pipe and the heat shield just enough for them to rub against each other. Anyway , just letting everyone know in case you should encounter a similar problem. (This is on the SS, other systems may not be effected) See, I have things go wrong too!!...BTW, My Onstar light was green all day today.....no way will it go to the dealers!! ..............talk later............... 
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Replying to: wbowl99 (Mar 22, 2007 7:19 am) I'm going to guess that it's a "normal" ticking caused by lower oil pressure at lower RPMs. Since all 3.5Ls don't do it, I wouldn't actually call it normal, just maybe "normal" for your particular car. Frank, you have the 3.5L, right? It has been the 3.5L that has had a few others mention the ticking, right? I wouldn't think the ticking is related the shuddering you're feeling but I wouldn't want to say for sure without seeing the car. Sorry I can't be of more help. Ron 
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