tire pressure and blowouts

[aruba5er]

Last week before leaving on a trip I checked and adjusted all 8 tires. The truck calls for 75 rear, 70 front. It was a warmish day and I'm fiddleing with the DIC ( chev drivers information center) when I got to "front tire pressure #84 rear tp 89# could not believe it. I knew they increased pressure as they warmed up but ? Just saying . I wonder if all those blowouts are caused but a natural increase because of heat. I know my weights and way under any load ratings. Guess thats why I have LT's on the fiver.

[the_bear_II]

Don't trust the DIC
I use several fleet vehicles, different makes and models, anytime I manually check pressure or gas mileage the DIC is off to the point where I wouldn't trust the information. And yes my tire pressure gauge is very accurate.

This also goes for the speedometers... some are off by > or < 5MPH.

[msgtord]

Your pressure is designed to be tested and inflated at cold temperature just for the reason your experiencing. 4 to 5 psi is a normal rise in pressure. Depending on the driving condition, you will see a difference in pressures for all tires. Do not adjust the pressure when the tires are hot during normal operation. The slight increase you see is normal. Do not release air when the tires are hot. You'll end up with a psi below what's recommended.

Also, you need to drive the vehicle a couple of miles in the morning to get an accurate reading. Some sensors need to spin to "wake up".

[Dutch_12078]

Tires rarely blow out due to over pressure. All vehicle tires are designed to operate well above the maximum cold pressure shown on the sidewall. The far more common tire failure cause is under inflation.