 |
01-17-2008, 01:31 PM
|
#1
|
Join Date: Oct 2007
Location: Sewell, NJ
Posts: 1,044
|
rattle under my car?
I started to get this rattle under my car a few weeks back and i havent payed much attention to it but id like to know what it is. Its louder on start up than when it gets warmed up. Trying to get a sound clip for yea but ive been busy.
|
|
|
|
01-17-2008, 01:38 PM
|
#2
|
Join Date: Oct 2007
Location: Sewell, NJ
Posts: 1,044
|
also i have been having hard started for some time now, takes two hard turn to get it going. Also if i am going 50-60 and step on the gas a little, enough to jump it into overdrive, i get this high piched squeel sometime, not everytime. i just let off it and it goes away.
-thats the only things wrong with the car i figured id throw them in there too.
|
|
|
|
|
01-17-2008, 01:42 PM
|
#3
|
Join Date: Aug 2007
Location: Piscataway, N.J.
Posts: 1,729
|
Sounds like it might be your Cat Converter starting to break apart. There is a honeycomb material packed inside of it, and when they start to go bad, it can break apart and make a rattling sound. Get it checked out quickly, because if some of those pieces come loose and get stuck inside your exhaust pipe, it will cause your car to overheat due to back pressure building up in the pipe! No big deal, your car will catch on fire and then you'll get a new one that doesn't have that problem. 
__________________
1991 FORMULA 350-GONE BUT NOT FORGOTTEN
1 of 1,197 with L98 Option/13.79@100 mph
1994 25th ANNIVERSARY TRANS AM GT -1 of ONLY 2,000 made/ Only 128 made with a HURST 6-Speed Manual and 91 with T-Tops and Compact Disc/ K & N Filtercharger/Magnaflow Performance Muffler/Air Foil- ORIGINAL MINT Arctic White Ultra Rare SURVIVOR. DAYTONA 500 PACE CAR Decal Kit!
SOLD: 1989 Turbo T/A in 1991 it ran 12:18@115 mph
Last edited by edpontiac91; 01-17-2008 at 01:45 PM.
|
|
|
|
|
01-17-2008, 04:01 PM
|
#4
|
|
Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
|
Best thing to do it get under it ( when exhaust is cold ) and start hitting on the exhaust, if the cat brink is loose or broken you might hear it rattle in the cat. Mine broke all apart and ended up in the muffler! And check for things like the heat sheilds, they tend to rattle loose over time, exhaust clamp, loose bolts.
As far as the squealing, how old is the serp. belt? or could it be coming from the tires? 
__________________
93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
|
|
|
|
|
01-18-2008, 12:37 AM
|
#5
|
Join Date: Oct 2007
Location: Sewell, NJ
Posts: 1,044
|
ill get under it tomorrow. belt is few months old, and deff not the tires.
|
|
|
|
|
01-19-2008, 10:44 AM
|
#6
|
Join Date: Oct 2007
Location: Sewell, NJ
Posts: 1,044
|
almost positive its the cat. It the stock one so will adding a magnaflow hi flow cat change the sound of my car?
|
|
|
|
|
01-19-2008, 12:56 PM
|
#7
|
|
Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
|
Quote:
Originally Posted by usp55
almost positive its the cat. It the stock one so will adding a magnaflow hi flow cat change the sound of my car?
|
Shoundn't have any real effect going from stock to highflow as far as sound.
__________________
93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
|
|
|
|
|
01-19-2008, 01:18 PM
|
#8
|
Join Date: Oct 2007
Location: Sewell, NJ
Posts: 1,044
|
and performance in negligible too I would assume - its only a 3.4L - might as well get a cheap one
Last edited by usp55; 01-19-2008 at 01:19 PM.
|
|
|
|
|
01-20-2008, 02:42 AM
|
#9
|
|
Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,473
|
Quote:
Originally Posted by usp55
and performance in negligible too I would assume - its only a 3.4L - might as well get a cheap one
|
You should be able to find generic replacements on ebay for ~$50 shipped.
- Justin
__________________
1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
|
|
