Tire pressure monitor alert already? help
03-31-2008, 03:13 PM
#1
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Tire pressure monitor alert already? help
I just bought my first corvette (2007) with 9k miles, certified from a dealer last week. I started it up yesterday and the "low tire pressure" alert came on. It showed in the front 27L/24R psi and back 27L/26R psi.
The manual says to take it in and have it checked, but I'm thinking I just need to stop at the gas station and put air into it until I get to 30psi.
Does anyone like to run different than 30psi?
And is it normal for the psi to go down slowly over time if the tires are fine?
thx
The manual says to take it in and have it checked, but I'm thinking I just need to stop at the gas station and put air into it until I get to 30psi.
Does anyone like to run different than 30psi?
And is it normal for the psi to go down slowly over time if the tires are fine?
thx
03-31-2008, 03:16 PM
#2
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St. Jude Donor '15
"In honor of jpee"
yes, fill it at THE NEAREST gas station. then, tomorrow morning check it with a tire pressure gauge ( a good one that hasn't been dropped and banged around). you may have to fill it some more.
Since you're driving to the station, the pressure will go up.
no, 30 lbs COLD is the way to go.
yes, over a period of sometimes weeks and sometimes months, the tire pressures CAN go down. Also, note this: for every 10 degrees in outside temp change, your tire pressure may go up or down 1 lb of pressure.
depending on where you live, let's say it's 80 degrees out and you go up into the mountains and the temp drops to 40. literally your 30 lbs of pressure in your tires could now be at 26 lbs. so be careful. and be careful when the seasons change or temps change dramatically.
Since you're driving to the station, the pressure will go up.
no, 30 lbs COLD is the way to go.
yes, over a period of sometimes weeks and sometimes months, the tire pressures CAN go down. Also, note this: for every 10 degrees in outside temp change, your tire pressure may go up or down 1 lb of pressure.
depending on where you live, let's say it's 80 degrees out and you go up into the mountains and the temp drops to 40. literally your 30 lbs of pressure in your tires could now be at 26 lbs. so be careful. and be careful when the seasons change or temps change dramatically.
Last edited by AORoads; 03-31-2008 at 03:19 PM.
03-31-2008, 03:36 PM
#4
Team Owner
Just FYI, a common source of a recurring leak is loose TPM/valve stem nuts and (possibly) damaged seals. If you fill up today and are low again tomorrow you should go to the dealer and have them check the valve stems, or you could get an inch/lb torque wrench and do it yourself if you are so inclined. The setting is 62 in/lbs (NOT ft/lbs). Good luck. 
03-31-2008, 03:37 PM
#5
It was your 24lb RF that set off the warning. AORoads is correct in every respect. I've had the same issue more than once with a cold snap. I have filled my tires in "warm weather" and everything is fine, then the tempature drops and the drop 2-3 lbs in my un-heated garage. Then get 26-32 degree day while I was parked at work (mines a daily driver up to 3" of snow) and went to go home and found all 4 between 24 and 26psi. Once the 24s were up to 26 the warning went off. (Flame suit on) While I don't weekly check and fill to 30, I do always do a 30 around, when the garage average temp goes from cold to warm to hot.
03-31-2008, 04:12 PM
#8
Team Owner
Yes, you definitely should have a tire gauge at home so you can check the tire pressure when they're cold.
As C6VetteRocks has indicated, in cold weather, the tire pressure will drop approximately 1 psi for every 10° drop in temperature (°F). Once cold weather is over, you can let a little of the air out to get them back to 30 psi cold.
If I find a tire that needs air (cold), I note how much it needs, then add that much when I get to the service station. They might pick up a pound on your way to the station, so you need to measure the one that was off again to see what your total pressure (hot) needs to be.
As C6VetteRocks has indicated, in cold weather, the tire pressure will drop approximately 1 psi for every 10° drop in temperature (°F). Once cold weather is over, you can let a little of the air out to get them back to 30 psi cold.
If I find a tire that needs air (cold), I note how much it needs, then add that much when I get to the service station. They might pick up a pound on your way to the station, so you need to measure the one that was off again to see what your total pressure (hot) needs to be.
03-31-2008, 04:16 PM
#9
Team Owner
And buy yourself a good quality tire gauge....I prefer either digital or dial (round) but not the sliding plunger type(pen sized). Don't waste money on a $1.49 type gauge. Mine is a GH Meiser, dial, made in USA with a big rubber boot around it for protection...indestructible..