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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 11-19-2014, 09:45 AM
cn90 cn90 is offline
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DIY: Tire Valve Cap ---> BMW vs NAPA part

OK,

This DIY takes no skills and 1 minute...

For those hard-core enthusiasts, the BMW Tire Valve Cap (metal type) is PN 36121120779, about $1.70/each at BMW dealer.
The nice thing about the metal valve cap is that: it has a rubber seal, so if you have a slow leak at the valve stem core, this will stop it. The standard black plastic cap does not have the rubber seal (I might be wrong).

I happened to be at NAPA Auto Parts this week and came across very nice metal caps, either NTH-90190 (which I bought) or NTH-90184 for $0.36/each.

The NTH-90190 is made in France, very nice quality. I bought 10 for $3.60, what a bargain.

Enter "tire valve cap" in NAPA website:
http://www.napaonline.com


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Last edited by cn90; 11-19-2014 at 09:46 AM.
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  #2  
Old 11-19-2014, 10:00 AM
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bluebee bluebee is offline
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Anyone know the size of our wheel rim holes offhand?

Funny you should mention steel valve caps, because I just picked up a set of steel valves, to put on my wheels to replace the rubber ones. These are not made in France though, as they're made in China, so, they might not be as nice as those cn90 found above.

I have no idea if they will fit though, but the parts store said they would.

They're 1.5 inches long, and it says they fit 0.453" and 0.625" rim holes.
They're sold by "Group 31 Incorporated, 100 Enterprise Drive, Newcornerstown, OH, 43832, phone number 800-438-3302, & 740-498-8324" and the part number is "15-416, 1-1/2 inch tire valves".

Tire Valves and Accessories

Anyone know the size of our wheel rim holes offhand?
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Please read the suggested threads, where the best always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 11-19-2014 at 10:13 AM.
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  #3  
Old 11-19-2014, 10:35 AM
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540 M-Sport 540 M-Sport is offline
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Quote:
Originally Posted by bluebee View Post
Anyone know the size of our wheel rim holes offhand?

Funny you should mention steel valve caps, because I just picked up a set of steel valves, to put on my wheels to replace the rubber ones. These are not made in France though, as they're made in China, so, they might not be as nice as those cn90 found above.

I have no idea if they will fit though, but the parts store said they would.

They're 1.5 inches long, and it says they fit 0.453" and 0.625" rim holes.
They're sold by "Group 31 Incorporated, 100 Enterprise Drive, Newcornerstown, OH, 43832, phone number 800-438-3302, & 740-498-8324" and the part number is "15-416, 1-1/2 inch tire valves".

Tire Valves and Accessories

Anyone know the size of our wheel rim holes offhand?
I think it is always wisest to purchase tire valve stems from the installing dealer/shop. For no other reason that they will install and warranty it. IF there is a problem down the road, removal and replacement is much more expensive than the cost of the valve stem.

Every time I have new tires installed on my BMW (about every 16 to 18 months) the shop will install new valves anyway, so they are constantly being replaced.

CN90, great find, I will save for future reference, but surprisingly, I still have the 5 original stainless steel valve caps on my car. When I had tires installed earlier this year, (along with new valve stems) my shop kept my ss valve caps this time, and I had to return back to retrieve them.
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Last edited by 540 M-Sport; 11-19-2014 at 10:41 AM.
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  #4  
Old 11-19-2014, 10:53 AM
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bluebee bluebee is offline
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Quote:
Originally Posted by 540 M-Sport View Post
I think it is always wisest to purchase tire valve stems from the installing dealer/shop. For no other reason that they will install and warranty it.
I'm never worried about warranties, as the only reason I would ever look at a warranty is as a tie breaker on two parts that are otherwise exactly the same.
- Which warranties are useful and whether or not a lifetime warranty make sense (1)

But, back on topic, the reason for the tire valves is that I have always wanted to try, just once, replacing my own tire, especially after the shenanigans that the last two tire shops pulled on me when I had to complain to Tire Rack, who quickly pulled my local tire installation shop from their recommended list.

Two things nobody does, that I always wanted to do at least once, are removing and replacing a tire and valve on the rim, and checking wheel alignment at home.

The problem I'm having replacing the tire is that I can't get air into the tire fast enough. It's all leaking out at the beads. I haven't tried the twisted-rope trick yet, but, that's my next step to sealing the bead enough so that air will stay in while I'm filling it up from my ancient garage-sale air compressor.

Interestingly, getting the tire on the rim was actually very easy, but, it was my old spare tire so, it was likely a bit easier than a new tire would be.

The next time I get tires (soon), I'm going to try to remove and replace at least one by myself (perhaps with help of friends because I will likely have to drive on the rubber to break the bead).
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Please read the suggested threads, where the best always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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  #5  
Old 11-19-2014, 11:12 AM
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540 M-Sport 540 M-Sport is offline
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Quote:
Originally Posted by bluebee View Post
I'm never worried about warranties, as the only reason I would ever look at a warranty is as a tie breaker on two parts that are otherwise exactly the same.
- Which warranties are useful and whether or not a lifetime warranty make sense (1)

But, back on topic, the reason for the tire valves is that I have always wanted to try, just once, replacing my own tire, especially after the shenanigans that the last two tire shops pulled on me when I had to complain to Tire Rack, who quickly pulled my local tire installation shop from their recommended list.

Two things nobody does, that I always wanted to do at least once, are removing and replacing a tire and valve on the rim, and checking wheel alignment at home.

The problem I'm having replacing the tire is that I can't get air into the tire fast enough. It's all leaking out at the beads. I haven't tried the twisted-rope trick yet, but, that's my next step to sealing the bead enough so that air will stay in while I'm filling it up from my ancient garage-sale air compressor.

Interestingly, getting the tire on the rim was actually very easy, but, it was my old spare tire so, it was likely a bit easier than a new tire would be.

The next time I get tires (soon), I'm going to try to remove and replace at least one by myself (perhaps with help of friends because I will likely have to drive on the rubber to break the bead).
Good for you, but understand the number of people that install their own tires and perform their own alignment (and even have the interest to do so) on this forum can probably be counted on one hand. Just sayin'...
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  #6  
Old 11-19-2014, 05:23 PM
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bluebee bluebee is offline
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Quote:
Originally Posted by 540 M-Sport View Post
understand the number of people that install their own tires and perform their own alignment...can probably be counted on one hand.
I just want to do the alignment once, to see if it really is as easy or as hard as "they" say it is:
- Philosophically why most people prefer to let a professional alignment shop align their suspension (1)

As for the tire mounting, that's just something I want to be able to do, in a dire emergency. I'm sure that once I do it once, I'll never want to do it again, but, they make it seem so easy on YouTube!
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  #7  
Old 11-27-2014, 10:43 PM
EconoBox EconoBox is offline
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Is there an easy way to replace the valve stem without dismounting the tire?
I think my little pin is bent, which makes checking the air pressure finicky.
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  #8  
Old 11-28-2014, 08:25 AM
rdl rdl is online now
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Quote:
Originally Posted by EconoBox View Post
Is there an easy way to replace the valve stem without dismounting the tire?
I think my little pin is bent, which makes checking the air pressure finicky.
You don't need a new valve stem, at least probably not.

Instead, replace the valve core in the stem. Google "valve core" and "valve core tool" You should be able to buy a pack of cores for a buck or two. The tool for under $5.
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  #9  
Old 11-28-2014, 09:30 AM
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johnstern johnstern is online now
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Well Bluebee's, those valve stems look really nice. The advantage of these metal valve stems is that they don't have to be changed. The rubber ones get old and the rubber cracks which is unsafe so, usually, when you buy new tires, the valve stems get changed too.

In the past, I always changed the stems to metal ones but have not done so lately. You have inspired me to go back to my old practice. The Tire Rack has a very nice explanation of the uses for metal valve stems.


"High-pressure metal clamp-in valves can be used with virtually any wheel and are highly recommended for all track activities, as well as when vehicle speeds may exceed 130 mph. Metal clamp-in valves use a rubber grommet to seal against the wheel when their retaining nut is tightened. While metal clamp-in valve design and styling can result in retaining nuts hidden inside the wheel or visible outside, those with the retaining nut on the outside offer a practical benefit of allowing retaining nut tightness to be checked and adjusted without having to remove the tire from the wheel. Metal clamp-in valves allow a maximum operating pressure of 200 psi and are available to fit either .453" or .625" rim holes, as well as specialty applications, such as 6mm (.236") or 8mm (.315") holes. Metal clamp-in valves use a metal cap and have effective lengths ranging from flush to 2" and are offered in straight or bent configurations to fit wheels with unique shapes. Low profile and lightweight alloy clamp-in valves are also available for racing applications."

Looks like the ones you bought are the safest kind with the adjusting nut on the outside of the rim.

Edit: These caps & keychain look cool on Amazon for $5.95 and fre shipping. Don't know about the quality but for the price, you can't be too picky.

http://www.amazon.com/Wrench-Keychai...alve+stem+caps

Last edited by johnstern; 11-28-2014 at 09:44 AM.
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  #10  
Old 11-28-2014, 10:40 AM
cn90 cn90 is offline
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Quote:
Originally Posted by EconoBox View Post
Is there an easy way to replace the valve stem without dismounting the tire?
I think my little pin is bent, which makes checking the air pressure finicky.
Just replace the valve core, they are dirt cheap.
- Gently raise the wheel a bit, no need to be off ground.
- Get air compressor ready.
- Replace core using core tool ($3 at parts store).
- Once done, inflate the tire and test for leak using soapy water.
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  #11  
Old 11-28-2014, 11:01 AM
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johnstern johnstern is online now
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Originally Posted by cn90 View Post
Just replace the valve core, they are dirt cheap.
- Once done, inflate the tire and test for leak using soapy water.
How about a thin film of saliva over the mouth (hahaha) of the stem?
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