so this past winter my windshield cracked on my jeep out of no where. i was told that it was because the heater in the tj's are too powerful for the car so when you use the defroster when its really cold out it cracks the windshield. has anyone else had this issue and if so what can i do other than not use the defroster when its really cold out?
I had a chip in my windshield for a year and didn't bother to fix it because it was not growing. When winter hit, the chip turned into a crack going almost all the way across the glass. It was the temp difference of the interior air against the exterior air and the weakness created in the glass from the chip that did it.
'00 TJ Sahara 4.0L, 3.5" RE Superflex, 1'' Body Lift, 35" Mickey Thompson MTZ's
BigSahara is right, cold glass plus hot air equals cracking. Most vehicles up here get it eventually, enough so that many drivers don't even bother replacing the windshield so long as the crack doesn't block their field of view. Mine goes almost completely across the windshield.
The Jeep defroster does seem to blow pretty hard compared to other vehicles. Perhaps not having the heat on the highest setting would help.
I had the same problem with the temp change and the crack growing. A good place to get new glass though is jeepglass.com They're cheap at least.
How hard are they to replace properly? I've never changed a windshield. I have a nice 8" spiderweb crack in mine thanks to a rock on the highway, of all places. I was going to have Safelite do it, but they want $250. That jeepglass website has them for $80.
jeepglass.com eh? that sound pretty cheap ill have to check that out, i cant imagine that they are too difficult to change since its just a straight flat piece of glass, just make sure it seats in the weather stripping and throw a bead of windshield glue around the edge.
Lexan can easily be obtained from places like McMaster Carr or similar industrial supply places.
As far as Jeep windshields, Never had a problem with mine cracking due to heat or cold. Usually there has to be a weak point before a crack begins. I've got a ding on my new windshield and I'm waiting for it to spread. The jeep windshields are relatively flat so anything hitting it is almost a guarantee crack or pit.
The windshields they are replaced with also makes a difference. There are different grades, and usually the insurance company will opt for the cheapest install.
for example, my original windshield had the smokey area at the top. My replacement windshield didn't. I didn't notice until after it was replaced. after calling them to complain, they stated they are obligated to replace the windshield, but not with an OEM type, just the cheapest aftermarket ones.
Also keep in mind that it's not all hot and cold but how many times you bang it around, and we all know how rough a Jeep rides. so a cracked windshield in a Jeep is a guarantee that it's going to split further.
Sorry about the "tread lightly" remark but only in light of the fact that it concerns your own land. The overall theory of "Tread Lightly" on public land still applies if people care about having places to wheel in the future. The land closure people are looking for any excuse. As far as putting it in this thread it was the only place where "I make my own trails" appears and therefore the only place where people would see it as verses buried somewhere else on this forum.