why do car engines get noisier with age?

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CarGuru > Technology > why do car engines get noisier with age? 22 February 2005 20:18:51

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why do car engines get noisier with age?
Usual Suspect 15 February 2005 11:56:12
	why do car engines get noisier with age?
		Add comment


Lawrence Glickman 15 February 2005 12:33:56 [ permanent link ]
	On Mon, 14 Feb 2005 23:56:12 -0800, Usual Suspect <same@as.reply-to.address> wrote: why do car engines get noisier with age? http://www.pistonslap.com/
		Add comment


Lawrence Glickman 15 February 2005 12:52:26 [ permanent link ]
	On Mon, 14 Feb 2005 23:56:12 -0800, Usual Suspect <same@as.reply-to.address> wrote: why do car engines get noisier with age? Using Internet Explorer 5.0 or greater LISTEN to GM Piston Slap right here http://www.pistonslap.com/photos.htm Lg
		Add comment


Ray 15 February 2005 20:07:41 [ permanent link ]
	Usual Suspect wrote:> why do car engines get noisier with age? my $0.02... until they're broken, they don't get that much noisier. However: the exhaust system starts to rust out and spring pinhole leaks... aftermarket muffler put on changes the tone... the underhood insulation falls off (like my Jimmy) and the engine appears to get louder. For a typical car, it's a gradual thing where the parts that are "wore" but not broken all add up to a noisy engine: fuel injectors, a bearing in one of the pulleys, the power steering pump, a pinhole exhaust leak, the underhood insulation ripped out, and so on... combined together it makes for a "loud" sound instead of a "nice" mechanical sound.
		Add comment


Dan Thomas nospam 15 February 2005 22:59:32 [ permanent link ]
	Piston slap is rare. There's .004" clearance in my Ford 300 and they don't slap. Slapping is more common when piston skirts crack and collapse. Engines get noisy mostly because of valve train noise. Lifters don't take up clearances properly, valves wear into the seats and stick when they get hot, guides get crudded up and make the stem sticky, and so on. Exhaust manifolds develop leaks that sound like sticky lifters. Belts squeak. Pumps rattle. In extreme cases, piston pins or main and rod bearings will clunk. There are plenty of noise sources. Dan
		Add comment


Steve 15 February 2005 23:24:48 [ permanent link ]
	Usual Suspect wrote: why do car engines get noisier with age? Parts wear, clearances (gaps) between parts get wider. Modern engines are often much more susceptible to increased noise as they get older because they use things (for example) like short "slipper" pistons that tend to rock in the bores more than older long-skirt pistons. The benefit being less friction and better efficiency, at the cost of more noise as the wear takes clearances to the ends of the tolerance range.
		Add comment


Daniel J. Stern 16 February 2005 00:47:46 [ permanent link ]
	On Tue, 15 Feb 2005 Dan_Thomas_nospam@yahoo.com wrote: Piston slap is rare. Piston slap is very common, and is growing commoner as automakers try to use hypereutectic pistons and keep parts and assembly cost at a bare minimum at the same time.
		Add comment


Steve 16 February 2005 01:16:24 [ permanent link ]
	Daniel J. Stern wrote: On Tue, 15 Feb 2005 Dan_Thomas_nospam@yahoo.com wrote:> Piston slap is rare.> Piston slap is very common, and is growing commoner as automakers try to> use hypereutectic pistons and keep parts and assembly cost at a bare> minimum at the same time.> Double-whammy: hypereutectic pistons in short-skirt, high-pin configurations.
		Add comment


Dan Thomas nospam 16 February 2005 04:38:02 [ permanent link ]
	I dunno if it's piston slap or something else, but there's something work that makes every V-6 from the 2.8/3.1 family sound like utter and complete ^$#@#&&*. Solid lifters in the Ford 2.8, at least. A German design. Got to adjust them just like in the good old days. Dan
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Spud Demon 16 February 2005 05:44:56 [ permanent link ]
	Lawrence Glickman <Lawrence_Glickman@comcast.net> writes in article <blp411l4c2ide92mlstm96m8qkpur6o7ol@4ax.com> dated Tue, 15 Feb 2005 15:18:17 -0600:>Including the lawsuits against GM,>and the LAME TSB's from GM that state adding 4 quarts of oil ever 700>miles is normal 7500, I think you dropped a 5. -- spud_demon -at- thundermaker.net The above may not (yet) represent the opinions of my employer.
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Ted Johnson 18 February 2005 00:57:27 [ permanent link ]
	and the LAME TSB's from GM that state adding 4 quarts of oil ever 700>> miles is normal Got a URL for that? I'd like to check it out. -Ted
		Add comment


Guest 20 February 2005 10:44:40 [ permanent link ]
	probably because we get fatter and the only way they can complain about the extra weight is to make some noise. hehehe old john "Usual Suspect" <same@as.reply-to.address> wrote in message news:9730978.TCXUDWRoBQ@yahoo.com...> why do car engines get noisier with age?
		Add comment


James C. Reeves 21 February 2005 04:52:19 [ permanent link ]
	"Usual Suspect" <same@as.reply-to.address> wrote in message news:9730978.TCXUDWRoBQ@yahoo.com...> why do car engines get noisier with age? I've not noticed older engines becoming noisier...unless a exhaust leak develops. I have a 1997 Grand Caravan that is as quiet and as smooth running as the day I bought it nearly 8 years ago.
		Add comment


David Jory 22 February 2005 05:35:49 [ permanent link ]
	Usual Suspect <same@as.reply-to.address> wrote in message news:<9730978.TCXUDWRoBQ@yahoo.com>...> why do car engines get noisier with age? I have a theory as to 1 reason why cars get noisier with age. I think that some noise-deadening material becomes less effective with age. Possibly by settling/compacting or maybe absorbing moisture. Is this possible/likely? David Jory
		Add comment


Steve 22 February 2005 20:18:51 [ permanent link ]
	David Jory wrote: Usual Suspect <same@as.reply-to.address> wrote in message news:<9730978.TCXUDWRoBQ@yahoo.com>...> why do car engines get noisier with age?> I have a theory as to 1 reason why cars get noisier with age. I think> that some noise-deadening material becomes less effective with age. > Possibly by settling/compacting or maybe absorbing moisture. Is this> possible/likely?> Its possible. Weatherstripping shrinks and wind noise gets worse, for example. But most sound-deadening material doesn't really deteriorate much if any with age.
		Add comment

CarGuru > Technology > why do car engines get noisier with age? 22 February 2005 20:18:51

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