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It might be a factor. Posted by RS [Email] ![]() ![]() ![]() In Reply to: could chassis and body flex be a factor?, jeffb, Tue, 1 Oct 2002 07:30:58 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I think that the biggest factor is shrinkage of the black vinyl skin. The dash shape is pretty rigidly held by the plastic fascia, speaker covers, glove box, and body mounting points. The vinly shrinks because the plasticizers are evaporated by the heat in the cabin during the summers here. Because the dash is held rigidly by parts like the fascia, the tension the skin is under increases to the point that it exceeds its elastic stress limit, and it splits. Since the foam underneath it doesn't have much strength in tension, it pulls apart where the vinyl has split.
My reasoning for this comes from the dashes I've seen where the skin has started to pull away from places like the lower corners of the coffee cup indent on the top of the dash. Those dashes had quite a few splits in addition to the shrinkage I mentioned. Those splits usually occur in areas where the stress is likely to be the highest - above the glovebox, around the corners of the speaker covers, between the front mounting points.
As the others pointed out, cold is a big contributing factor because it makes the vinly less elastic (more brittle).
posted by 66.21.16...
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