[Dave Colangelo]

Not sure of the exact reason but I will say this.

If I had to guess the dash cracking is a mix of a few things. I had some bad dash cracking on my 88 924S. In part the sun degrades the material they use to cover the dash and causes it to become very brittle. I think it simply drys out. On top of that what ever material is under it most likely gets some moisture in it and expands a bit. This in my opinion is what causes the cracks to become so present. I noticed quite a bit of warping and swelling like behavior in my 924S. I now always use a sun shield in my 944 to keep any direct light off the dash when its parked. You must also remember that many people dont keep average cars as long as they do there Porsche's. Im sure this happens on other cars but no one has bothered to care enough to keep the car until it happens. If it does not bother you that much I say use the money on mechanical fixes that are more important. You may want to consider looking for a parts car with a good dash, getting it for the dash then selling off the rest.

Many people here have recovered there dashes in a variety of ways and I dont think there is one solution that works best but many that work well. I would say that storing the car out of direct sunlight and in a relatively dry garage will do more for you than any thing else.

Regards
Dave