Well yesterday, I was doing some maintenance (new shocks, oil, fuel filter) when I was making sure the fuel filter wasn't leaking after install, I heard a rattling noise and it sounded like it was coming from the Cats, does anyone know if this is common and if it is causing me any problems.
Thanks,
R.
RChevy.48
2001 Silverado RCSB 4.8L
Current Mods
Flowmaster Exhaust
LT1 Fans
vette cam sitting in garage
It could be the cats. If you look inside, they basically just have diffusion screens in them. It could also be the heat shields against the firewall. I found a rattle there before.
No problems or sounds from mine. 114,000 miles plus no problems.
1999 Silverado 1500 Ext. cab Red 2/4 hotchkis drop & swaybars, bilstein stocks, AR626 & 404 Nitto's, Yank converter, ASM headers, ASP underdrive pulley, Taylor wires , free mods VCN 2000, Nelson Performance tuning
2002 Red WS6 M6; Flow master K&N
i'm pretty sure mine rattle along with the exhaust hangers, oh wait, my driveshaft f@cked everything up when it broke off, doh, lol.
allen
Nelson Performance
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'94 Chevy Truck: 8.9 et, 408 twins
I was just wondering if the rattle is from the cats, would this cause any performance problems.
RChevy.48
2001 Silverado RCSB 4.8L
Current Mods
Flowmaster Exhaust
LT1 Fans
vette cam sitting in garage
i'd check to see it any heat shields or that extra metal on the cats is loose
Nelson Performance
FastestTruckList.com
NP on Facebook
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'94 Chevy Truck: 8.9 et, 408 twins
What's up guys?!! Haven't been on in a while. Anyway .... I noticed this topic on rattling. I get a rattle when i hit bumps in the road ,sound like its coming from behind the dash on the pass. side, i tore the glove comp. apart to see what it could be. I will have to check those sheilds you guys are talking about. Also, I am wondering if my cats too are rattling!?? When I am idling in drive at a standstill and then hit the gas a little,just a little, i hear a little rattle that sounds like its coming from under the truck. sounds like an exhaust rattle. I checked my exhaust and there is nothing wrong. Now i am wondering if it is the cats..?? I hate shit like this!! drives me up the wall!!!
01' RCSB 5.3,3.73 posi,K&N gen2,ASP crank pulley,LT1 fans,3" catback single exhaust,Nelson performance PCM tuning, egr trim,17x8 Denali rims(polished),2/4hotchkis drop.
Soon 2 come:Edge performance 3200 stall w/2.58STR,KDS servos,N2O?
Get a louder stereo system!!LOL
2006 Superior Blue Trailblazer SS AWD, Stock as a rock
Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning
i can't really help on this one, hell my truck has more rattles than anyone's truck,
get that foam sealer and squirt the whole can inside your dash, lol, hahahah
good luck,
allen
Nelson Performance
FastestTruckList.com
NP on Facebook
Youtube Channel
'94 Chevy Truck: 8.9 et, 408 twins
RChevy.48...
fisrt lemme say your avatar is hilarious! Gotta love Monty Python and the Holy Grail!
Yeah if your cats rattle something is wrong with them. I had a set go bad and they were loud as hell driving slow and idling. Mine was caused by a very rich condition (10psi too much FP) and well yeah, hacked them out and replaced them...this was on a heads/cam SBF.
If they go bad on a pretty much stock truck I'd raise an eyebrow to the dealer and see what they say.
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