Rattle at Low RPMs

Blazerboy1287 · #1 12-15-2005, 10:02 AM

Hello everybody, it's me again...

I have a strange noise that occurs everytime I accelerate slowly, or I am driving at low RPMS in first. It sounds like a godawful death rattle

coming from under my car. I have no problems with power/economy, but the noise is horrible. it goes away after I start to accelerate harder, but since most of my driving is low speed/low rpm, i would like to fix it... any ideas other than the cat, which I am gonna check in about 30 mins after my car chills off?

93LT · #2 12-15-2005, 10:28 AM

At idle and just off idle, my water pump shaft was so loose it was making a rattle/knocking sound similar to a rod knock, yet it wasn't leaking. It was plenty audible inside the vehicle and in the front. It was even noticable when I crawled under the car behind the front tires. I found it after removing the belt and spinning all the pulleys. Might be worth a try.

cleanshavenrsx · #3 12-15-2005, 10:32 AM

possibly a heat sheild when i get cars i rip em off whether their good or not their pointless and always eventually make that horrible rattle that makes your baby sound like a pos i havent been under my new blazer YET! but i will be tomaro so i have no idea what its like yet

Blazerboy1287 · #4 12-15-2005, 10:34 AM

aha! it is the cat! Damnit, now i have more money i have to shell out. Oh well.

the87hyper · #5 12-15-2005, 10:48 AM

Quote:

Originally Posted by cleanshavenrsx

possibly a heat sheild when i get cars i rip em off whether their good or not their pointless and always eventually make that horrible rattle that makes your baby sound like a pos i havent been under my new blazer YET! but i will be tomaro so i have no idea what its like yet

Pointless? You have lots to learn dude! Think of what they're called HEAT SHIELD!!

SultanGris · #6 12-15-2005, 08:05 PM

Quote:

Originally Posted by the87hyper

Pointless? You have lots to learn dude! Think of what they're called HEAT SHIELD!!

pointless, unless your dumb enought to park in tall grass, or touch them, heheh. bet you wont do it twice.

i rip them off also, but not till they start making noise.

Blazerboy1287 · #7 12-15-2005, 10:42 PM

out of curiosity, how much does it cost to have a magnaflow universal hi-flow cat installed? (not including the parts cost)?

SultanGris · #8 12-15-2005, 10:44 PM

Quote:

Originally Posted by Blazerboy1287

out of curiosity, how much does it cost to have a magnaflow universal hi-flow cat installed? (not including the parts cost)?

so your saying your noise isnt the heat shields, but from inside the cat?

i dont know, ive never replaced one.

the87hyper · #9 12-16-2005, 12:51 PM

Quote:

Originally Posted by SultanGris

pointless, unless your dumb enought to park in tall grass, or touch them, heheh. bet you wont do it twice.

i rip them off also, but not till they start making noise.

Well when your spark plug wires get brittle and other components that age quickly age even quicker because your tore off a heat shield rather then fixing it properly, you'll know why. Thoese items are there for a reason, your making your own problems!

BryanCa · #10 12-16-2005, 07:18 PM

Quote:

Originally Posted by SultanGris

so your saying your noise isnt the heat shields, but from inside the cat?

i dont know, ive never replaced one.

This may help...but my blazer would rattle when I take off slowly...it sounded like thin metal rattling against something...but my problem was my muffler. It rotted out on the inside. I've had my muffler changed a few times within the last 4 years. Not sure why she goes thru so many...but worth a shot.

cleanshavenrsx · #11 12-16-2005, 07:30 PM

i dont beleive a magnaflow exhaust is too bad in price go to a reputable muffler shopand youd prolly get a full cat and back magnaflow for under 300

a heat sheild does exactly the name sheild heat nothing more i dont want to hear it it pointless youll never notice its not there.... theres a console that runs down the center that sheilds heat

SultanGris · #12 12-16-2005, 10:13 PM

Quote:

Originally Posted by the87hyper

Well when your spark plug wires get brittle and other components that age quickly age even quicker because your tore off a heat shield rather then fixing it properly, you'll know why. Thoese items are there for a reason, your making your own problems!

um, yea, your catalitic converter is part of your exhaust system, located under your car, before your muffler, it gets really hot, like 1200 degrees, i think, not exactly sure, but the heat sheild is there so morons dont touch it directly, or if you park in tall dead grass, or a pile of leaves it wont start a fire. pretty sure it wont affect your plug wires at all.

Blazerboy1287 · #13 12-16-2005, 10:21 PM

Quote:

Originally Posted by cleanshavenrsx

i dont beleive a magnaflow exhaust is too bad in price go to a reputable muffler shopand youd prolly get a full cat and back magnaflow for under 300

a heat sheild does exactly the name sheild heat nothing more i dont want to hear it it pointless youll never notice its not there.... theres a console that runs down the center that sheilds heat

I already have a catback system with 3-inch piping... it's a flo-pro muffler and sounds great... i just need the cat changed and since it is stock, i figured i'd get a high-flow one from magnaflow.... they cost about 50-85 i think. i just wondered how much it would cost to have somebody put one on.

the87hyper · #14 12-17-2005, 11:13 AM

Quote:

Originally Posted by SultanGris

um, yea, your catalitic converter is part of your exhaust system, located under your car, before your muffler, it gets really hot, like 1200 degrees, i think, not exactly sure, but the heat sheild is there so morons dont touch it directly, or if you park in tall dead grass, or a pile of leaves it wont start a fire. pretty sure it wont affect your plug wires at all.

GOLLY your one smart cookie!! I think everyone knows that the spark plugs dont mount to the exhaust! Your missing the point i'm trying to make, and FYI they put the heat shield above the exhaust!! Imagine if there were no heat shield. Think of your gas line and brake lines!! You do know that your so called 1200 degree muffler can boil brake fluid? Well im going to assume that the engineers at GM have no f-king clue what there doing! till next time

cleanshavenrsx · #15 12-17-2005, 08:16 PM

the lines and wireing were set to be away from the exhaust... heat sheilds are pointless their metal the get hot and send off heat just as much........ maybe if they were made of something that dispersed heat more efficently...... but i do agree with the heatsheild surrounding the header but you were referring to the wrong heatsheild we remove the one under neath for the exhaust.... i have the look at the one for the headre closer... i think that one might make cooling the header with free flowing air more difficult thus being the heat sheild is sheilding heat and cooling

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