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Does Your 6.2l Vibrate At Idle?

ihop

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ihop Enthusiast

ihop

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Does your vortec 6.2L vibrate slightly (enough to feel it through the seat and steering wheel) when at a stop or in park? Mine does but on other forums, dealers have been telling customers its normal. Should I even bother to bring mine in? The throttle body is clean, i made sure of that. 

Zembonez Senior Enthusiast

Zembonez

Posted
Posted
Does your vortec 6.2L vibrate slightly (enough to feel it through the seat and steering wheel) when at a stop or in park? Mine does but on other forums, dealers have been telling customers its normal. Should I even bother to bring mine in? The throttle body is clean, i made sure of that. 

A V8 engine is not a naturally balanced engine configuration. At certain RPMs there are vibrations that can be felt. These are normal and part of the design. Differing engine mounts make the problem noticeable on some vehicles and less so on others. If you actually have a miss at idle, that is a different subject altogether...

jblakeney Senior Enthusiast

jblakeney

Posted
Posted
Does your vortec 6.2L vibrate slightly (enough to feel it through the seat and steering wheel) when at a stop or in park? Mine does but on other forums, dealers have been telling customers its normal. Should I even bother to bring mine in? The throttle body is clean, i made sure of that. 

 

Only way to balance a stock engine is to turn it off. Slight vibrations are possible at low and high rpms...

 

Jbo

4wd Enthusiast

4wd

Posted
Posted
Does your vortec 6.2L vibrate slightly (enough to feel it through the seat and steering wheel) when at a stop or in park? Mine does but on other forums, dealers have been telling customers its normal. Should I even bother to bring mine in? The throttle body is clean, i made sure of that. 

 

Mine is 5.3L, but it had the vibration at idle since new, dealer say it's normal and it is related to fuel!. ..it almost disappeared now.

jandersinc Enthusiast

jandersinc

Posted
Posted

My 2010 Yukon 3/4 ton 4x4 6.0 liter has the same shudder / vibration while it's in park or in gear at a stop. It's not bad, but you can feel it.

ihop Enthusiast

ihop

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Good to hear that its normal from other owners as well. Definitely not my first or biggest V8 but the L92 seems to be the one that vibrates the most.

ken1mod Senior Enthusiast

ken1mod

Posted
Posted

Gentlemen,

 

A v8 has perfect primary and secondary balance by design. Google "v8 balance". Your truck should idle silky smooth. My 5.3 and every other 8 I have ever owned idled smoothly.

 

Ken

jro909 Senior Enthusiast

jro909

Posted
Posted

i have a mild vibration at idle :tear: its not constant just a little here and there...its a truck,its a v8, it runs great...i'm happy with it

4wd Enthusiast

4wd

Posted
Posted
You might also be experiencing the "cat test" which makes the vehicle go lean.

 

I understand this done only when the engine is started, open loop then close loop. I may be wrong.

music Senior Enthusiast

music

Posted
Posted

Just tell yourself you have a nice, mild cam in there... just waiting for you to unleash the power:)

 

My 99 5.3 didn't do this, but my 08 5.3 has a slight, random "rumble" at idle that I noticed when new. I've complete forgotten about it since. Honestly, I think it probably does have a different cam profile, as this truck puts out considerably more power than the 99 did (the stock exhaust has a more free-flowing sound to it too). The 2010 5.3 has VVT (as does the 6.2), so I would think they could tune some of that out?

caddycruiser Enthusiast

caddycruiser

Posted
Posted

Cam profile--the 6.2L powerhouse especially--differences in gas, temperature/humidity, etc. all contribute. This is natural to the 6.2L most, however, by nature. Should be minor, but happens, especially with changes in the conditions.

 

Very variable. Not abnormal.

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