I performed a search concerning this before asking this with inconclusive results. My son's '91 Maxima has just developed an obscene rattle that comes right from the Y pipe heat shield area. This should be the simplest thing in the world, except I spent a LOT of time under the car and the shield seems to have nothing to do with it. It noise to be coming from INSIDE the pipe area. Sometimes it goes away entirely and does seem to be altered sometimes by various RPM levels. This does not make much sense to me, so I implore you experts out there to hopeful explain what it could be and what I might do to correct it. Any insight is greatly appreciated!!!

 

low rpms.....i have heard of this happening after installing a new y-pipe...some people have put some sort of padding between the y-pipe and the top shield. Thats as far as I've heard concerning rattling by the shield. Hope that helps.

lophix

 

maybe the stock flex section on the y-pipe is shot. sounds like it might be time to call warpspeeed or budget.

 

I have the exact same problem in my 89 Maxima with the bad rattle or bad sound coming from my Y-pipe and I am just going to budget and have a used stock one put in becuase I can't stand that rattling sound either.

 

if you guys order from warpspeed, order MIG welded since it'll be at your door a lot faster than with going with TIG welded.

 

Hey, did you check your headers? I think Ive had that same problem before, but not due to a ypipe. (Considering one tho) Make sure the headers are flush with your cyl heads.