Squeaks Rattles and Rolls

993 are known for having an extremely tight body that for many examples exhibits the complete absence of squeaks and rattles even into their advanced age. Some find the body so quiet that they find the sound of pens and coins rattling in the door pockets to be a prominent noise.
However many owners of a 993 have upgraded items such as the audio system or have disassembled interior features and upon reassembly have noticed some squeaks and rattles that were not previously present.

Resolving these noises is not difficult and involve:

• A can of silicone or Teflon lubricant spray and shooting a minuscule amount into any seam that seems like it could be rubbing and noisy. My car has a black interior, if yours is not black make a test first that the lubricant doesn't cause staining.
• Also, inspect any wiring and make sure it is tied up so it is not flopping around. Some go as far as to wrap any added wires in Polyethylene Spiral Wrap or black cloth electrical friction tape to minimize the chance of wire rattles going forward;

Polyethylene Spiral Wrap

 friction tape






Flex Conduit



• Avoid containing wires in the commonly used automotive flex conduit or wire loom tubing as it turns wires into a snake rattler. 
• Our cars are hand made and I have noticed hand-applied felt on occasion where cabin components touch. They were probably added at the factory at the final inspection to quiet things down. This approach also can work well by tucking a thin strip of felt into a seam that produces an offending cabin rubbing sound.
• There is a known problem of windshield squeaking in the cabin. Since the glass is tightly bonded to the body this sound may be coming from how the windshield was bonded or the internal or external molding rubbing as the body flexes. There are two directions to take in resolving the noise. 
• Either:
•  lubricate the offending rub or; 
• Use an adhesive to tack the two surfaces together. 
• Here are two approaches: 



Caulk Filled 
Window Gutter



• For exterior issues, I have used caulking/adhesives to fill the gutter under the seals and in the process gluing the seal to the body and glass. Here is how it is done. This has the added benefit of protecting the gutter from future corrosion, a known body issue around both the windshield and the backlight glass on a 993. It may also quiet down windshield squeaks that can result from how the windshield was originally set in its urethane mounting adhesive.
• For interior glass noises, I would try a little Silicone or Teflon lube on a rag and rub it along the offending seal first, if that doesn't resolve the issue one can directly spray a minuscule amount of the lube directly on the seal and wipe the excess off with a rag.
  
  I also see no reason why adding a very small bead of caulk/sealant carefully applied under the edge of the interior seal wouldn't be a valid approach as well. Be aware once you try the lubricant approach the calk/sealant may have trouble adhering to the glass or the seal/gasket unless every bit of the lubricant is cleaned off.

Alternatively, any aftermarket exhaust system with the words "stage two" in its name will sort out your problem right away.

Andy ;-)

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