Question about Nissan Altima

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I have a 2008 Nissan Altima 2.5SL. It has a strong vibration around 1800RPM. I have had the all motor and transmission mounts checked, transaxle assembly and the transmission replaced (under warranty) with no improvement. The dealer is telling me it is a balance shaft and that I need to replace the engine for $6000.00 Does this diagnosis sound correct? Could it be anything else? Is there anything I can do to correct this without replacing the engine? If not is there a cheaper source for an engine replacement. Finally if I continue to drive it with this problem will it damage the engine further and eventually fail?

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The book shows it as a v9 3.5 l with a chain drive years 2002-2012
there is also an altima 2.4 l 1993-2001 another chain driven engine
both have balance shafts
If the chain has been replaced lately , it could be an improperly fitment of the balance shaft
If not I suspect that it could be a worn chain that needs replacing and the vibration is coming from lack of chain tension
the book does not show ant belt driven engines with a balance shaft
at this point I would take it to an accredited professional service center with experience on your engine and have a proper diagnosis done and quote
a new engine is the last thing I would be talking about

Posted on Apr 13, 2017

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Posted on Jan 02, 2017

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SOURCE: after replacment of t; belt vibration on engine

you have to change the shaft also

Posted on Jan 12, 2009

csmock132
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SOURCE: replace the engine motor mounts and the transmission mount. Would like to know how to do it. Thanks.

Check the frame mounts too. You will have to loosen the bolts and jack the motor up with a jack and a woodblock.

Posted on May 04, 2009

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