Why? I doubt if they would do much, if any, good if the valve was leaking. They get in the way when checking air pressure - if they weren't there I'd likely check more often. All I can think of is to keep dirt out of valves?
TIA
If you live in a cold climate, moisture is another reason. You don't want ice or snow to build up in the valve and maybe end up damaging it or causing a slow leak.
Oren wrote in news: snipped-for-privacy@4ax.com:
Valve caps on car A./C? I've never noticed them. Where are they? On the A/C itself? Where 'freon' is added? I don't even know where mine is. Never had to mess with it. (Only have owned the car a few months.)
Yes.
I don't even know where mine is.
Unless you have a problem and are DIY you don't need to know.
I would think dirt would be the main reason. Get dirt in there, then you fill it, some of the dirt gets stuck and the valve doesn't close.
Yep.
But the primary purpose they serve is in finding lost socks. When you lose one sock, that sock goes to a special place. The same place lost valve caps go.
Apologies to those who are not Ren and Stimpy fans.
KenK wrote in news:XnsA36D6829B3F38invalidcom@130.133.4.11:
That's it exactly: to keep foreign matter out of the valves.
I like the aftermarket ones that can unscrew the core. If they were cast iron, I could find them with a magnet. If a wheel had 6 valves, I could balance it by screwing on cast iron valve caps of different weights.
Hi, New cars have tire pressure monitor valves. Don't need to check pressure unless monitor senses it. Put in Nitrogen which is more stable. Nitrogen filled tire valve caps are green in color. You think keeping dirt out is unimportant?
To keep dirt out of valves
Speaking for others, I accept your apology.
Or a not so slow leak.
I've had good results using 80% nitrogen.
It's worked for me for 50 years.
Tony Hwang wrote in news:iaXxv.34763$ snipped-for-privacy@fx07.iad:
You *are* aware, aren't you, that air is 79% percent nitrogen anyway?
I was at a tire store last week and there was some nutcake demanding nitrogen be used on his PT Cruiser clown car. ROFLMAO!
Yeah, but diluted watered down nitrogen isn't any where near as strong.
:). I remember when cars came with those style caps.
Harry K
What a great idea! I need a few. I recently bought some valve caps with built-in pressure indicators but one of them already blew off the valve stem for some reason. So far the other three are holding but I am beginning to wonder about how good it is long-term to have the valve pin always depressed (so that the caps can read the tire pressure). I guess we'll see. At least when the one valve cap blew off, it failed "safe" and didn't deflate the tire.
Tony Hwang posted
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.