Hello,
Like many owners my 718 Cayman has had an annoying amount of rattles and squeaks. Most of them I have now tracked down and removed entirely or greatly reduced. So here is a little guide I've made to help fellow owners. Please feel free to add your own experiences.
Let's start with an easy one. The passenger side seat belt rattle. You need to slide the seat belt retainer part right to the top to hold the buckle in place. As per the photo below.
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Seat Squeak. Pressure on the side bolster around my shoulder and upper arm would cause a very annoying squeak. At first I thought it was the plastic airbag dome because I could produce a squeak by pushing on this area, but in fact it wasn't this making a noise when I was sat in the seat. It was coming from the seat latch mechanism. Using a spray can of lithium grease and a straw nozzle I sprayed little bursts in the metal moving parts I could see through the gap, I moved the latch up and down to access different areas, I also put a little grease on the inside plastic runners where the knob slides up and down. I finished off my moving the latch up and down many times to work all the grease through. This has so far completely solved the seat squeak.
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Rear Storage lid rattle. On my passenger side (RHD) this lid would rattle. I tried the lid in both the fully open and closed positions without and luck. With the lid fully open I then lifted it slightly and stuffed in a paper towel in the gap to stop the lid moving at all. This stopped the rattle. So far I'm not sure of a neat solution to this one.
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Rear fluid lid Covers. These things can make an annoying high pitched rattle. To test simply remove them and go for a drive. I was able to reduce the noise by removing the lids and spraying a small amount of silicone grease on the plastic closing latches. Another solution is to use a bit of rubber under the lid so it's pushing upwards when the lid is secured and holding it in place.
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Rear Trunk/Clunk Rattle. This one plagued and 981 but seems better on the 718. I have done three things to reduce this. First of all I wrapped Velcro tape around the latch locking pin as per this photo.
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You can see the depressed part of the velcro where the latch catches. You will need to push the springy parts at the side down to access the pin.
Secondly I added Velcro to the stoppers which meet when the trunk is closed. These can vibrate against each other.
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Thirdly I adjusted the stoppers used to adjust the trunk closing position. Adding Velcro to the closing surfaces meant these needed to come out slightly anyway. As they come out the latch area becomes a tighter fit, however the side stoppers become a looser fit. So you need to experiment with these. Annoyingly the optimum position depends on the temperature.
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Privacy Screen. This thing can make a noise too. You can remove it to test. I've found the screws come loose and you need to tighten them up every so often.
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I hope this can be helpful
Like many owners my 718 Cayman has had an annoying amount of rattles and squeaks. Most of them I have now tracked down and removed entirely or greatly reduced. So here is a little guide I've made to help fellow owners. Please feel free to add your own experiences.
Let's start with an easy one. The passenger side seat belt rattle. You need to slide the seat belt retainer part right to the top to hold the buckle in place. As per the photo below.
Seat Squeak. Pressure on the side bolster around my shoulder and upper arm would cause a very annoying squeak. At first I thought it was the plastic airbag dome because I could produce a squeak by pushing on this area, but in fact it wasn't this making a noise when I was sat in the seat. It was coming from the seat latch mechanism. Using a spray can of lithium grease and a straw nozzle I sprayed little bursts in the metal moving parts I could see through the gap, I moved the latch up and down to access different areas, I also put a little grease on the inside plastic runners where the knob slides up and down. I finished off my moving the latch up and down many times to work all the grease through. This has so far completely solved the seat squeak.
Rear Storage lid rattle. On my passenger side (RHD) this lid would rattle. I tried the lid in both the fully open and closed positions without and luck. With the lid fully open I then lifted it slightly and stuffed in a paper towel in the gap to stop the lid moving at all. This stopped the rattle. So far I'm not sure of a neat solution to this one.
Rear fluid lid Covers. These things can make an annoying high pitched rattle. To test simply remove them and go for a drive. I was able to reduce the noise by removing the lids and spraying a small amount of silicone grease on the plastic closing latches. Another solution is to use a bit of rubber under the lid so it's pushing upwards when the lid is secured and holding it in place.
Rear Trunk/Clunk Rattle. This one plagued and 981 but seems better on the 718. I have done three things to reduce this. First of all I wrapped Velcro tape around the latch locking pin as per this photo.
You can see the depressed part of the velcro where the latch catches. You will need to push the springy parts at the side down to access the pin.
Secondly I added Velcro to the stoppers which meet when the trunk is closed. These can vibrate against each other.
Thirdly I adjusted the stoppers used to adjust the trunk closing position. Adding Velcro to the closing surfaces meant these needed to come out slightly anyway. As they come out the latch area becomes a tighter fit, however the side stoppers become a looser fit. So you need to experiment with these. Annoyingly the optimum position depends on the temperature.
Privacy Screen. This thing can make a noise too. You can remove it to test. I've found the screws come loose and you need to tighten them up every so often.
I hope this can be helpful
