Hey guys. i just got my FD and loving it. but i have a few qs since i am new to Mazda! The car has about 75,000 on the chassis, and so far i have replaced all the rear bushings, rear diff bushings and put on some used shocks, obviously in better condition that mine were, and some springs, i am not sure of the specs but they are a bit stiffer than stock. now my q is, i know they are stiff as it is, i dont mind that at all, but is there any other way to fix interior noise, i do a lot of city driving, and in LA the streets are like a war zone, i am sure some of you know, i would hate to ruin the car, and hopefully fix some of this stuff, just to see if some of you have any suggestions? it seems though, there are suspension noises and some in car....

Thx,

Eli

 

Aside from exterior noises, there's not a lot internally you can do. Start by checking things such as the stock jack components. They can rattle about quite a bit if not secure very well.

Also, you might check this thread:
https://www.rx7club.com/interior-exterior-audio-26/sound-dampening-information-151598/

 

I agree with Mahjik - start by looking for basic things. The jack, the defroster vents under the windshield, etc are popular noisemakers.

In many cases, previous owners or mechanics have taken apart the interior panels and damaged the clips, snaps, and sound insulation that was originally there. If you can figure out which panels are making the most noise, then it can help to carefully remove them and evaluate if anything isn't right. There are tapes and things you can use to reduce rubbing between parts as well.

Dave

 

Hate to jack your thread, but it's a related topic and not worthy of its own thread...

My doors both sound like tin cans slamming against a counter top when I close them. all other FDs I've been in have had a nice healthy thud when I closed the doors. I assume some jackass removed the interior insulation, so would putting Dynamat inside the doors help with this?

on another note, Dynamat would cut down on the exterior noise you hear inside the car.

 

There was a thread a while back about how to fix this. the problem, IIRC, is that the door skin vibrates against the intrusion reinforcement. This was originally prevented by some adhesive that tied the two together, but it eventually hardens/breaks loose, etc., and causes this noise.

The solution was to take the door apart and redo this bond.

Dave

 

Your door has an outer panel that makes contact with the frame inside. The connection between them has separated, and the nasty sound is the rubbing/vibration between them. If you do a search you'll find methods to solve that problem.

Dave

 

Geez, Dave, we duplicate each other quite often, don't we? I must have replied a millisecond before you did.

DaveW

 

Thanks fellas I almost wasted money on 50lbs of unessecary insulation.

 

Rats, of all the little privleges I have as a mod, I can't change the order so it looks like I thought of it first.