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Argument with co worker #4962908 12/27/18 08:23 PM
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Dylan1303 Offline OP
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Where talking about cars and what not, then co worker said any mod you do to increase power shortens your motors life. He claimed putting a header on his 4.0 jeep will shorten his motor life, but the power increase is worth it. I disagreed with him say basic bolt ons dont decrease life. I could agree about putting a bigger turbo on a diesel might but i have to say hes half right.


12 cruze rs 1.4t 6spd pp 5w30 tuned on 22psi
19 cruze auto 1.4t amsoil oe 5w20 tuned on 24psi
Re: Argument with co worker [Re: Dylan1303] #4962913 12/27/18 08:30 PM
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atikovi Online Content
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Chances are, that Jeep will be totaled in a wreck before the engine blows from putting on headers. Or it will break in half from rust.

Re: Argument with co worker [Re: Dylan1303] #4962930 12/27/18 08:40 PM
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eljefino Offline
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The question is, so what if you do? Did you have fun doing it? Did the powertrain still last the life of the car, and if not, can you afford to rebuild it better, faster, stronger?

Re: Argument with co worker [Re: Dylan1303] #4962932 12/27/18 08:41 PM
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dishdude Online Content
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I think most people adding performance mods drive the heck out of them which decreases life. So I would say you're both right.


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2018 GTI M1 Euro 0w-40 Wix WL10024
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Re: Argument with co worker [Re: Dylan1303] #4962973 12/27/18 09:25 PM
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chainblu Offline
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If the only mod your friend does is headers, whatever shortened engine life there is (if any) will be non perceivable.

Re: Argument with co worker [Re: Dylan1303] #4962982 12/27/18 09:35 PM
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Wolf359 Online Content
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There's a fine line between shortening engine life and no harm done. Basically the car companies are somewhat conservative so some mods to get more out of it might not really shorten engine life, but if you go too far, then it will. It's one of those unknowns though, you've crossed the line when the engine blows.

Re: Argument with co worker [Re: Dylan1303] #4962985 12/27/18 09:40 PM
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92saturnsl2 Offline
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I consider an engine "wearing out" due to mods would be one of these things:

lose compression (or oil control) = worn rings
lose oil pressure (worn bearings)

Sure, I suppose mods can have some influence on the above, but I bet 99% of engine failures would be due to the things that cause engine failure anyways, regardless of mods-- usually people overheating them, running low on oil, poor maintenance or other general neglect.

I can think of some mods that have a definite detrimental effect such as forced induction-- but those failures tend to be a function of tuning (like poor fueling) and not the mod itself.


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Re: Argument with co worker [Re: Dylan1303] #4962987 12/27/18 09:41 PM
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ZeeOSix Offline
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Originally Posted by Dylan1303
Where talking about cars and what not, then co worker said any mod you do to increase power shortens your motors life. He claimed putting a header on his 4.0 jeep will shorten his motor life, but the power increase is worth it. I disagreed with him say basic bolt ons dont decrease life. I could agree about putting a bigger turbo on a diesel might but i have to say hes half right.


Driving around with the throttle barely cracked and the engine putting out 20 HP vs driving at WOT all day long at max HP will result in more engine wear. Don't need any "mods" to make that happen.

Re: Argument with co worker [Re: Dylan1303] #4962990 12/27/18 09:44 PM
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JeffKeryk Offline
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I am not sure headers will shorten an engines life. Now if the gasket blows out and you suck an exhaust valve...


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Re: Argument with co worker [Re: Dylan1303] #4962991 12/27/18 09:45 PM
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clinebarger Offline
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Gains from a header alone is negligible. Hit it with a 150 wet-shot of Nitrous.....You will find the weak point!


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Re: Argument with co worker [Re: JeffKeryk] #4962992 12/27/18 09:46 PM
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clinebarger Offline
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Originally Posted by JeffKeryk
I am not sure headers will shorten an engines life. Now if the gasket blows out and you suck an exhaust valve...


What 4.0L Jeep doesn't have an primary exhaust leak??


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: Argument with co worker [Re: Dylan1303] #4963021 12/27/18 10:31 PM
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It depends on the motor; some can take a significant power bump in stride, others cannot.


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2009 Cooper Clubman
1999 Wrangler Sahara
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Buy what makes you smile...
Re: Argument with co worker [Re: dishdude] #4963039 12/27/18 10:57 PM
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Originally Posted by dishdude
I think most people adding performance mods drive the heck out of them which decreases life. So I would say you're both right.


+1


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2004 Chevrolet Cavalier

Too much GM.. ;-)

Re: Argument with co worker [Re: Dylan1303] #4963048 12/27/18 11:12 PM
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JHZR2 Offline
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Engine life is essentially time at temperature. A mod in and of itself will not necessarily increase these metrics, unless more power is consistently employed.

Re: Argument with co worker [Re: JHZR2] #4963051 12/27/18 11:18 PM
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Originally Posted by JHZR2
Engine life is essentially time at temperature. A mod in and of itself will not necessarily increase these metrics, unless more power is consistently employed.


Avg amount of HP it has put out over time is also a factor. An engine idling for 1000 hrs isn't going to wear as much as the same engine running WOT (at max HP output) for 1000 hrs. Parts like rings, pistons, wrist pins, rod and crank bearings get increased loads on them when the engine is putting out max HP and high RPM.

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