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Old 08-27-2005, 06:58 AM   #1
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Default Heat shield... i think

Another thread from me.
I have a stock exhaust on my ti and it makes a hi pitched vibration noise whenever the engine rpm's increase and its sounds like a poorly maintained civic. Its quite embarrasing when your passing slower cars. But I think it may be a loose heat shield. The vibration sounds like a thin piece of aluminum like the heat shield. I just wanted to know if anyone could help. Thank you.

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Old 08-27-2005, 02:57 PM   #2
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It definitely sounds like your cat's heat shield. It's something that happens quite often. My car is so low it used to scrape on speed bumps until finally I had to remove it as it rattled. It's nothing complicated. You can then coat the cat with a high temp zinc primer and then shoot it with a high temp paint to protect it from the elements. No big deal.


Engine: 2.1L Hartge conversion (bored to 86X91mm, ported & polished head, new valves, new crank, & upgraded ECU), Supersprint SS headers, Hartge exhaust, custom cat bypass (track), KV85 wires, Bosch platinum plugs, Vitesse cf spark plug cover, Vitesse cf CAI, Samco hoses, Fiamm air horns. Drivetrain: custom ssk, Vitesse adj. clutch stop, Redline D4 ATF & 75W90. Chassis: 18x8.5 Hartge Classics on 225/40/ZR18 Direzza DZ101s, 17x8 Hartge 7 spokes on 235/40/17 Direzza Z1 *specs and 17x9 Enkei MT1-R on 235/40/17 Direzza Z1 *specs(track), Vitesse 10mm spacers with cf/billet hub extenders, Bilstein PSS9 coilovers, Hartge sway bars & strut brace, urethane offset LCABs, Vitesse rsb, billet/urethane RSMs, X-brace, ATE BBK, ATE slotted rr. rotors, Goodridge ss. lines, ATE Superblue. Exterior: Violettschwarz, Hartge lip spoiler, window spoiler, hatch spoiler & mirrors, Vitesse cf door pillars, Vitesse cf fog light blanks (track), ZKW ellipsoids, HIDs in headlights, highbeams and foglights, and much more... Performance BMW Magazine feature car March 2003 www.vitessetuning.com
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Old 08-30-2005, 06:56 PM   #3
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well, to be put simply, whack the fukker off.

I replaced my system recently with a magnex cat-back, and the same noise was really pissin me off, so i went at it with a screwdriver, hammer and pliers. It aint hard, you WILL get rusty faced however.
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Old 08-30-2005, 07:18 PM   #4
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IIRC, there are two heat shields, one for the cat, one for the exhaust. step outside the car and find out if it's coming from the middle (cat) or rear (exhaust).

if it's the rear, get someone else to keep the revs up and put a GLOVED hand on the shield. if it stops, that's your problem.

if not, could be your can.
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Old 08-31-2005, 12:45 AM   #5
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someone once explained that the heat shield for the cat is there to get it to heat up more quickly so IF you can keep it there and secure it from rattling, that would probably be the better option. just my 2 cents.
1996 318ti, California package, 267k miles
current mods: bilstein sports, bavauto springs, e30 m3 LCABs, solid metal ball joints, bavauto RSMs w/reinforcements, e30 3.73 LSD & halfshafts, supersprint cat-back exhaust, turner rear sway bar reinforcements, IE poly subframe & RTABs + camber/toe kits, powdercoated e36 32x front calipers, sport mirrors, H&R 28mmF/19mmR sway bars, x-brace, auto solutions SSK w/poly bushing upgrade, BMW CD43 head unit, DICE HD Radio w/iPod integration and "stealth" HD antenna, staggered style 68s, orange electronic TPMS, leather arm rest, JT Designs metal undertray

acquired and awaiting install: heated seat kit, cali top switch relo, lumbar support kit, park distance control kit, heated washer nozzle kit, m-coupe rear subframe, trailing arms, differential, and halfshafts, m-coupe front/rear brakes with master cylinder, under hood light kit, mud flaps, rear sun blind, auto-dimming rear view mirror, tilt steering wheel retrofit, apexcone 5000K HIDs with 55W ballasts

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Old 08-31-2005, 03:10 AM   #6
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yeah, my heat shield was loose, my mechanic just put couple more bolts on and kept it secure, he said dont remove that stuff.

he actually loved my remus exhaust when we installed it, the car has such a low bass its awesome i love the exhaust.
Intake, Sony mp3/cd player, remus cat-back exhaust,
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