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If a dealer or a poster here says, "the ones that knock are just as normal as the ones that don't", again, I slap my forehead and say, "Duh, ya think?"
I'll take a non-knocker please. And I don't doubt that some here "might" be getting 100K miles out of a knocker but I wonder if your performance is poorer along with oil consumption, mileage and emissions, etc. Do tell.
Let's say we use the sound clip below as a water mark--which my 5.7 sounds like.
Does that sound normal to you? If so, for what duration and at what outside temperature? Mine will go for 30 minutes at 30 degrees F. It continues, just-audible when hot. Nobody that has heard my car (incl. two engine builders) considers it normal and all tell me it is piston slap.
Oby, perhaps this has been an ongoing problem with the 350 but my sister's 74 Camaro didn't do it (xcept when I was in the back seat with a black-haired beauty). I've had friends that would beat on new 1980's vintage 350's that never had it. And why are these sites, forums and dealer complaints only popping up recently? Why are most of the entries at the LS1 Petition (now apparently silenced), from model years 98-02? (almost all 5.7 liter there).
(nomore takes deep breath...) Why are GM's own TSB's only now addressing the knocking (since about 2001)? Why have they only now proclaimed that 1 U.S. Qt. per 2000 miles oil-consumption is "acceptable"? Do you agree? Why did all the dealers admit there was a fix on order just prior to the "main office" issuing all the related TSB's except for one (3.1 liter engine): http://www.expage.com/gmtsbs The 3.1 liter is in the Malibu and GM is fixing or replacing those--why? Why am I concerned? I've had several GM service managers tell me it's because of the Internet. Is that it? Did the Internet cause Ford, Subaru and Jeep to have knocking engines also--whose warranties they honored BTW.
Didn't GM have an assembly-line strike in 1997? Maybe scabs and disgruntled assemblers don't cut good blocks. I don't have all the answers.
As far as the gambling analogy goes, I'm a crack blackjack player. I've read everything from Thorpe to Uston. I know how big a differece a small percentage can make. The Casinos don't offer warranties. GM, however, does. Casinos always pay their losses. GM, the largest and most powerful auto maker in the world, has (IMHO), found a way not to pay and they have egg (and lemons) all over their face.
minikin, I hope that you will speak your mind here freely as I try to. I'll continue until I'm removed by our gracious hosts. I hope I add some perspective here at least, before I stir the soup.
We don't need it. If you disagree with what someone posts, that's OK. If you go on to question their intellect for posting it, that's NOT OK.
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