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#4758945 - 05/16/18 04:16 PM Does anyone buy into this statement
littleant Offline


Registered: 10/10/17
Posts: 360
Loc: Vermont
Read this on a website called 2 carpros. >An engine that is running unusually smoothly and quietly is a sign of low compression caused by worn piston rings < ??? I guess I better overhaul my engine
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#4758955 - 05/16/18 04:30 PM Re: Does anyone buy into this statement [Re: littleant]
FordBroncoVWJeta Offline


Registered: 04/16/16
Posts: 748
Loc: KS
Better get engine rebuilds on all my cars.
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#4758959 - 05/16/18 04:32 PM Re: Does anyone buy into this statement [Re: littleant]
Zee09 Offline


Registered: 05/05/18
Posts: 150
Loc: W. Palm
No, but you ever notice that your mechanical goodies always sound and run great before they fail??? Weird!

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#4758964 - 05/16/18 04:40 PM Re: Does anyone buy into this statement [Re: littleant]
NoNameJoe Offline


Registered: 06/03/15
Posts: 398
Loc: New York
Originally Posted By: littleant
Read this on a website called 2 carpros. >An engine that is running unusually smoothly and quietly is a sign of low compression caused by worn piston rings < ??? I guess I better overhaul my engine
No, because it's absurdly anecdotal, a blanket generalization with absolutely no proof, on a website where anyone can post questions and anyone can post answers. Rubbing two brain cells together to even ponder it is a waste of time and effort.

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#4758980 - 05/16/18 05:05 PM Re: Does anyone buy into this statement [Re: littleant]
bullwinkle Offline


Registered: 10/09/04
Posts: 7580
Loc: Cincinnati, OH, USA
Originally Posted By: littleant
Read this on a website called 2 carpros. >An engine that is running unusually smoothly and quietly is a sign of low compression caused by worn piston rings < ??? I guess I better overhaul my engine
Maybe if ALL the rings were worn down exactly alike? Most engines I've had with bad rings exhibited massive oil burning on deceleration long before any other symptoms (like loss of power) happened...
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#4758984 - 05/16/18 05:08 PM Re: Does anyone buy into this statement [Re: littleant]
d00df00d Offline


Registered: 10/20/05
Posts: 11155
Loc: PA
Originally Posted By: littleant
Read this on a website called 2 carpros. >An engine that is running unusually smoothly and quietly is a sign of low compression caused by worn piston rings < ??? I guess I better overhaul my engine

The key word here is unusually.

This statement isn't about smooth and quiet engines. It's about engines that become quietER and smoothER than they normally are.

No idea how true this is, but it's certainly less ridiculous than the interpretation that low NVH comes from bad compression.
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#4758996 - 05/16/18 05:20 PM Re: Does anyone buy into this statement [Re: littleant]
Trav Offline


Registered: 11/20/06
Posts: 18581
Loc: MA, Mittelfranken.de
Quite possibly. If I think about some high HP/Ltr engines that have gotten tired they do seem smoother and quieter than they did when in top form.
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#4759081 - 05/16/18 06:37 PM Re: Does anyone buy into this statement [Re: Trav]
Garak Offline


Registered: 12/05/09
Posts: 24372
Loc: Regina, Saskatchewan, Canada
Yes, I suppose it's possible. Testing would be difficult, and anecdotal evidence might even be hard to come by, given that this is obviously a very slow process, and noticing it would be hard.
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#4759087 - 05/16/18 06:41 PM Re: Does anyone buy into this statement [Re: littleant]
nap Online   content


Registered: 04/27/18
Posts: 230
Loc: Canada
Is this some twisted way of promoting Mobil 1? laugh

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#4759093 - 05/16/18 06:45 PM Re: Does anyone buy into this statement [Re: littleant]
JeffKeryk Offline


Registered: 01/09/10
Posts: 182
Loc: Los Gatos, CA
I guess my engines will run forever!

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#4759106 - 05/16/18 07:00 PM Re: Does anyone buy into this statement [Re: littleant]
das_peikko Offline


Registered: 01/01/18
Posts: 458
Loc: San Antonio, TX
There's no such thing as unusually quiet and smooth. Quiet and smooth is what you want.

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#4759176 - 05/16/18 07:59 PM Re: Does anyone buy into this statement [Re: nap]
Marco620 Offline


Registered: 02/25/14
Posts: 2085
Loc: Deplorable in Kansas, HK fan b...
Lmfao x 10000
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#4759303 - 05/16/18 10:17 PM Re: Does anyone buy into this statement [Re: littleant]
antonmnster Offline


Registered: 03/29/10
Posts: 800
Loc: Minneapolis
I used to work somewhere with a Cushman Turf Truckster that had a Kawasaki liquid-cooled two cylinder with over 25,000 hours on it. Crazy hours.

In its last couple of years it got quieter and slower. It was almost kind of weird. Eventually it didn't have enough power to move and was finally replaced. It was a very slow death.

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#4759481 - 05/17/18 07:03 AM Re: Does anyone buy into this statement [Re: das_peikko]
Ducked Offline


Registered: 10/25/12
Posts: 4231
Loc: Taiwan
Originally Posted By: das_peikko
There's no such thing as unusually quiet and smooth. Quiet and smooth is what you want.


Sounds like you usually get what you want, then.

I can tell you with some confidence that doesn't apply to everyone else.

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#4759616 - 05/17/18 09:09 AM Re: Does anyone buy into this statement [Re: littleant]
Schmoe Offline


Registered: 05/12/03
Posts: 7219
Loc: Oklahoma
No.
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