Exhaust hitting floorboard??

danman · 06-29-2006, 04:47 PM

I just got a custom Y pipe built for my car and it is hitting under the driver side when I take off in 1st gear or get on it. What can I put between pipe and the car to make it not rattle. I wedged a shop rag in there for now, but I am looking for something heat resistant to put there. I was thinking about a high heat rubber spacer or something like that. I already tried heating it up and bending it down some. That didn't work.

Does anyone have any ideas on what I can use?

**Zboner** · 06-29-2006, 04:57 PM

mind use to do this, u need to get under there and just make adjustments to the exhaust and maybe try moving the hangers around that might fix the problem also

**RedT/Anumber1** · 06-29-2006, 08:27 PM

Use space age heat resistant foam. developed by NASA. LOL
Na just kiding, but I'm pritty sure there probably some kind of foam product you can wedge in there.

**98bpmta** · 06-30-2006, 07:21 AM

The BFH mod..............

**BIG D's SS** · 06-30-2006, 08:27 AM

I believe Texas Speed Shop has a y-pipe hanger that is about $50 dollars that is made to fix the problem. I had that problem with mine and just adjusted it, but worst case scenario there is a hanger to fix it.

**Raymond K. Hessel** · 06-30-2006, 08:54 AM

In addition to the methods listed above, the following work to varying degrees:

1. Poly motor mounts
2. Welding a valve spring in between
3. Heater hose

**BIG D's SS** · 06-30-2006, 08:57 AM

Originally Posted by Raymond K. Hessel

In addition to the methods listed above, the following work to varying degrees:

1. Poly motor mounts
2. Welding a valve spring in between
3. Heater hose

Well you would need a stiffer tranny mount but that is gonna give you a vibration.

Don't know about a valve spring you might need to remove it and it will still vibrate.

The heater hose I tried that and it still hit and made a noise.

**Raymond K. Hessel** · 06-30-2006, 10:15 PM

Originally Posted by BIG D's SS

Well you would need a stiffer tranny mount but that is gonna give you a vibration.

Don't know about a valve spring you might need to remove it and it will still vibrate.

The heater hose I tried that and it still hit and made a noise.

Like I said..."varying degrees". Poly motor mounts will more than likely solve any y-pipe banging problem. On the other hand, a heater hose, a valvespring, TSP's Y-pipe hanger, are all just band-aids.

**sunsetorangess** · 08-13-2006, 05:09 PM

Yepp been there done that, i finaly gave in and had a shop cut out a section and reweld a new pipe in place of it too eliminte the annoying banging... I also learned that bc of the bangin my ls1 was bein "retarted". It was setitn off the whole knock sensor deal. After i got it fixed and drove it around, Wow thats what the ol ls1 use too feel like
Big difference, almost like another car
J