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mikey1600 · 04-09-2012, 08:08 PM

Hey guys,

finally installed my HFC's over the weekend since I had a couple extra days off for Easter, ran into a slight problem and seeing if anyone else had similar issues so I can possibly work out where some rattles are coming from.

so just above idle it rattles every so slightly, then just under 2k RPM it's a lot louder and can definitely hear it easily like a vibration rattle noise, sounds like a flimsy piece of maybe heat shield or something is rattling.

so far I've had a cat back exhaust system on the car for about 2-3 months now and have never noticed any rattle at all, yet when I looked under the back of the car just above where the exhaust mufflers sit, there is a big heat shield looking thing with a piece that drops down, this was actually touching ever so slightly on the exhaust, but looks like its been like that for quite some time, as you can see slight rub marks on the exhaust system... so didn't think it was this, but I've bent this over on itself as it felt quite flimsy but hasn't changed at all.

I've got to get the car jacked up again and check everything over again I guess, just moreso voicing to get some ideas of what to check, maybe I can add some extra washers/rubber stops somewhere to save this is someone else has had similar issues...

for reference, running BERK HFC's and Invidia CBE system.

So far no CEL or anything, and the HFC's actually add quite a bit of performance, it definitely makes the exhaust much louder, can definitely feel gains up in the high end 6k+ rpm, where it kind of used to taper off a bit, feels like it pulls a lot more through this range to redline, screams! haha.

There is a big heat shield which looks to be held on by 4 bolts underneath the rear trunk of the car, has anyone taken this off without issue? always hesitant to remove heatshields...

04-09-2012, 08:08 PM	#1 (permalink)
mikey1600 Track Member Join Date: Jul 2010 Location: Brisbane, Australia Posts: 503 Drives: MY11 370z Black Rep Power: 16	Rattles after installing HFC's Hey guys, finally installed my HFC's over the weekend since I had a couple extra days off for Easter, ran into a slight problem and seeing if anyone else had similar issues so I can possibly work out where some rattles are coming from. so just above idle it rattles every so slightly, then just under 2k RPM it's a lot louder and can definitely hear it easily like a vibration rattle noise, sounds like a flimsy piece of maybe heat shield or something is rattling. so far I've had a cat back exhaust system on the car for about 2-3 months now and have never noticed any rattle at all, yet when I looked under the back of the car just above where the exhaust mufflers sit, there is a big heat shield looking thing with a piece that drops down, this was actually touching ever so slightly on the exhaust, but looks like its been like that for quite some time, as you can see slight rub marks on the exhaust system... so didn't think it was this, but I've bent this over on itself as it felt quite flimsy but hasn't changed at all. I've got to get the car jacked up again and check everything over again I guess, just moreso voicing to get some ideas of what to check, maybe I can add some extra washers/rubber stops somewhere to save this is someone else has had similar issues... for reference, running BERK HFC's and Invidia CBE system. So far no CEL or anything, and the HFC's actually add quite a bit of performance, it definitely makes the exhaust much louder, can definitely feel gains up in the high end 6k+ rpm, where it kind of used to taper off a bit, feels like it pulls a lot more through this range to redline, screams! haha. There is a big heat shield which looks to be held on by 4 bolts underneath the rear trunk of the car, has anyone taken this off without issue? always hesitant to remove heatshields...