Pri63

What up...my sister has a 2000 I30t same engine as our...she has recently noticed a rattling sound when she accelerates from standing...but after that it goes away....has anyone experienced this? She took it to the Infiniti Stealership and they found no problems( stupid ) and no codes. Any ideas what it could be, she's rolling onto 86k...could it be the timing chain?

Thanks....

linuxr

Im just guessing here, but might be a heat shield on the exhaust system.

NewLoveI30

Knocking? Dose she have the old coils?

Pri63

Most likely yes...but wouldn't faulty coils throw codes??

GeneYes_Se5spd

double the heat sheild! it will usually make noise when you're either idling or accelerating. Its a very metalic noise, almost like a muffled sound of two screw-drivers hitting together.
Check that out and give us a holler.

Gene

kobalt

iTrader: (3)

I had a rattle at acceleration & idle when I bought my MAX - turned out that the heat shield needed adjustment.

NewLoveI30

Not Necessarily. I had mine replaced under warrantee and I wasnt throwing any codes.

About this heat shield... Which one seems to give the problems?

Progress

iTrader: (26)

Why do heat shields rattle like that? Are they loose or something? How can they be tightened?

GeneYes_Se5spd

yeah, they get loose, all you have to do it tighten them. I believe some cars have them sitting on rubber gromets, so i would replace those. Otherwise, just give it a good tighening. The reason the shake loose, i believe, has to do with the fact thats its a thin peice of metal with a large surface area the gets shaken from the vibrations of motor/road irregularities, and the contraction and expansion due to heat.

Gene