Grabinov911
Well-Known Member
- Local time
- 10:13 PM
- Joined
- Jan 27, 2012
- Messages
- 558
- Reaction score
- 245
- Location
- Southern California
Hey guys I have vibration coming from the rear of my 70 Roadrunner. It only occurs at low idle (after choke is off) or at idle in gear (say at a stop light). It is definitely a low frequency noise, like two pieces of sheet metal vibrating together.
I crawled under the car and started banging on things and I discovered that the noise can be replicated by banging on the right rear of the gas tank from the bottom. I checked the tank straps, and it is not coming from them. The tank is about half full and is a replacement tank from Classic Industries which I installed about 1 year (but only a few hundred miles) ago.
Is the noise coming from a vibration between the sheet metal top of the gas tank and the underside of the trunk floor? I'll admit that I re-used the old "mat" which goes on top of the tank and between the tank and trunk floor. It was old and I though it looked kinda cool (probably made of asbestos or some radical new material like that).
Anyone ever had this vibration? Do I need to drop the tank (ugh) - or maybe just shoot a little triple-expanding foam between the tank and the trunk floor?
I crawled under the car and started banging on things and I discovered that the noise can be replicated by banging on the right rear of the gas tank from the bottom. I checked the tank straps, and it is not coming from them. The tank is about half full and is a replacement tank from Classic Industries which I installed about 1 year (but only a few hundred miles) ago.
Is the noise coming from a vibration between the sheet metal top of the gas tank and the underside of the trunk floor? I'll admit that I re-used the old "mat" which goes on top of the tank and between the tank and trunk floor. It was old and I though it looked kinda cool (probably made of asbestos or some radical new material like that).
Anyone ever had this vibration? Do I need to drop the tank (ugh) - or maybe just shoot a little triple-expanding foam between the tank and the trunk floor?
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