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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #51  
Old 12-25-2009, 02:53 PM
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captainaudio captainaudio is offline
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An alternative to Vaseline would be electrical contact cleaner which is readily available in spray cans at Radio Shack. Spraying this inside the caps before they are attached should prevent them from fusing.

CA
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  #52  
Old 12-26-2009, 09:17 AM
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Got an idea that might work. What about the nylon tape you put on threaded pipes for plumbing jobs?
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  #53  
Old 12-26-2009, 09:38 AM
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Quote:
Originally Posted by BerfsBimmer View Post
Got an idea that might work. What about the nylon tape you put on threaded pipes for plumbing jobs?
That would work as well.
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  #54  
Old 12-26-2009, 10:52 AM
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DSXMachina DSXMachina is offline
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That would work as well.
Would work better if he uses Teflon (ptfe) tape instead.
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  #55  
Old 12-26-2009, 11:06 AM
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Originally Posted by DSXMachina View Post
Would work better if he uses Teflon (ptfe) tape instead.
+1 When I retired, that's one thing (of many) I made sure I had a supply of (from company service vehicle inventory). Somehow a Little Giant ladder went missing.

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  #56  
Old 12-26-2009, 11:10 AM
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DSXMachina DSXMachina is offline
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Originally Posted by djfitter View Post
+1 When I retired, that's one thing (of many) I made sure I had a supply of (from company service vehicle inventory). Somehow a Little Giant ladder went missing.

dj
LOL, got yourself a lifetime supply of 6" gate valves did you?
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  #57  
Old 12-26-2009, 11:28 AM
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LOL, got yourself a lifetime supply of 6" gate valves did you?
First I wouldn't touch one of those again, ever, and no they weren't ordinary truck stock anyway. I didn't take any of the big pipe wrenches either. If I need anything of the sort, younger brother is still in the Biz. I could use a good ladder around the house though.

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  #58  
Old 12-26-2009, 11:54 AM
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Of course the low tech solution would be to simply unscrew the caps and screw them back on periodically.

Or of course you could also hire someone to do it for you.

CA
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  #59  
Old 12-26-2009, 12:09 PM
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Get the dealer to do it. He'll probably charge you $50 per tire, while assuring you that only BMW dealers know the right computer codes to do it, and I'll reminding you that the tire stems are not covered by BMW's 4-year maintenance program.
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  #60  
Old 01-01-2010, 09:54 AM
TenaciousTina TenaciousTina is offline
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I am a new BMW owner and just got my 09 335i in May of 2009. The first day the temp really dropped here I start up the car and it said I have low tire pressure. I took it to the local tire shop and he, also a BMW owner, said that a drastic weather change can cause this??? Anyway....as he was removing the caps to check the pressure...one of the caps broke! I am due for my first service next week so I am going to see what exactly broke.

This car is really different than anything I have ever owned and its a learning curve for me....lol.
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  #61  
Old 01-12-2010, 11:43 AM
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FWIW: Valve Stem Cap Update

Just got back from running across the freeway to the dealership to acquire the roundel valve stem caps. I took the P/N off the BMWUSA website (36 11 0 009 840). The parts guy queried me as to year and model before he retrieved the caps. He told me I had the wrong P/N which is for the metal caps which in his words, "will mess up your TPMS".
He said he had the right caps in stock and came back with P/N 36 11 0 421 544 which are most definitely plastic caps that have little o-rings in them. The verbiage on the back of the package states the caps "feature an 'O-ring Seal', insuring consistent tire pressure and a clean valve orifice when removed."

Yippee! TPMS Safe and Stylish!!
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  #62  
Old 01-12-2010, 12:27 PM
rgzimmer rgzimmer is offline
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Interesting. I have a set of those Roundel stem caps that I never ended up putting on my '06, but did put on my '09. I take them off all the time when checking pressures. I can not imagine going months, much less years, without checking it. I even check my lug nut torque!
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  #63  
Old 01-12-2010, 01:45 PM
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DSXMachina DSXMachina is offline
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Quote:
Originally Posted by rgzimmer View Post
Interesting. I have a set of those Roundel stem caps that I never ended up putting on my '06, but did put on my '09. I take them off all the time when checking pressures. I can not imagine going months, much less years, without checking it. I even check my lug nut torque!
Hundreds of dollars of TPMS equipment is totally wasted on you and others like you who can be depended on to properly maintain their vehicles. All these gadgets and gizmos like TPMS and 'electronic dipsticks' and coming soon, the 30K oil changer interval, are designed to protect people from themselves.
I have hundreds of customers who NEVER check their tire pressures. Ever. One of them was the guy who snapped off the valve stem when he tried to remove a seized on cap. Oops.
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  #64  
Old 01-12-2010, 02:17 PM
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I just noticed on my wife's MB that the front caps are metal but very short whereas the rears (we just replaced the tires) are plastic. The fronts are also relatively new. I used 2 different places to mount and balance the front/rears and I wonder if one got it right and the other.... She does not report any TPMS problems and since we are giving it back soon and I do unscrew them to check the pressure I'll let it ride.

My 911 came with plastic caps, but I am missing one
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  #65  
Old 01-12-2010, 02:18 PM
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I have the BMW Fancy caps I purchased from Tisher.

I have had them for two winter now without problems.

the bigger problem in the northeast states is that they have started to use liquid salt products. Many may say "all salt melts yadda yadda" -- yes, but this liquid stuff is horrible and if it splashes on your car before it has had chance to be diluted with snow, it does leave a mark and have already seen how it can crust on and leave dull finish where is stayed on the car too long. Has not happened to my bimmer but I have seen it on a few at my work parking lot.

I spray off my car with a hand sprayer before putting in the garage. The nasty liquid stuff is going to cause a whole host of new problems because its going to get into places not fully protected!
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  #66  
Old 01-12-2010, 07:11 PM
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Just checked my tire pressures when I put on my new valve stem caps... Uniformly 1lb loss since the last check (early November), which I attribute mostly to temperature differential. I know, I should do this on a monthly basis -- but time flies by sometimes.
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  #67  
Old 01-12-2010, 08:00 PM
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Now that DSX has enlightened me about metal valve caps I have had to change my plans.

Obviously plastic is completely unacceptable to a person of my impeccable taste. Of course I certainly did not want the metal caps to fuse to the valve stems. I pondered this dilema and then the solution came to me. GOLD! I contacted Tiffany's (I go there every morning for breakfast) and arranged to have them make me a set of 24 Carat Gold BMW Logo valve stem caps.

If anyone else is interested send $800 in cash to:

CaptainAudio Enterprises
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5th Ave.
New York, NY 10021

CA
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  #68  
Old 01-12-2010, 08:21 PM
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The galvanic cell is created from the Aluminum valve stem and the steel cap. Only water need be present to sustain the reaction (salt is extra bonus if present). If the caps are made from aluminum or specially treated steels then all is OK.

But I can tell you from and experiment I unknowingly created the caps at most autoparts stores are not the right ones from aluminum stems. My Grand Cherokee suffered.
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  #69  
Old 01-12-2010, 08:30 PM
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Quote:
Originally Posted by Nordic_Kat View Post
Just checked my tire pressures when I put on my new valve stem caps... Uniformly 1lb loss since the last check (early November), which I attribute mostly to temperature differential. I know, I should do this on a monthly basis -- but time flies by sometimes.
Ummm, yeah ... at least
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  #70  
Old 01-12-2010, 09:19 PM
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Kurgan,

Give a girl a little credit for actually owning my own tire pressure gauge, and knowing how to use it. B'sides, in reality the car was only driven about 5 of the 8 weeks since its last tire pressure check so I'm only a week out of compliance.
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  #71  
Old 09-15-2013, 09:01 AM
STILLCREEKMAN STILLCREEKMAN is offline
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How to remove a seized metal tire valve cap

I read this too late. However, my brand new 2010 X5d came with chrome valve caps. up to 50k miles had no issues. new tires installed at 50k (Dec '12) and tire shop (Sears) reused everything. at 60k ( 2 months later) had oil changed and valve caps could not be removed! I didn't understand the potential severity of the situation and knew if there was a pressure issue the TPMS would let me know and I would figure it out then. Took it back to Sears soon afterward and "they forgot to do it" and it never showed on the ticket. Well at 80k miles I started researching this issue and understood the severity of the situation. Fortunately my TPMS never went off and I had time to figure this out by reading online (versus idiots at Sears and BMW) so here is how I fixed it. Credit is given to others online but felt that it should be repeated and with some more details.
NOTE: I did this to help people not to be as stupid and procrastinate as long as I did. Please don't waste time ridiculing me. I was stupid and fortunate and don't need any irrelevant comments. Stay on focus please.
1. get PB Blaster spray (anti seizure spray). Best product for this application but others may work. Spray on tire a couple of days in row. I put cloth near because it will make a mess.
2. use a dremel type tool with a metal cutting disk. cut off end of cap very carefully. there is a plastic gasket in cap so be aware. too little is better than too much at first. I did this for two reasons. See #4 and #5
3. I VERY CAREFULLY scored the cap from front to back to get more penetration of the PB Blaster. Tried one without this step and it worked and the next one it did not but not sure exactly why. perhaps the heat generated also helped break the bond.
4. spray PB Blaster on the cap (use a rag for overspray)
5. take a vise grip and hand tighten it on the valve cap. then take it off and tighten it slightly more. I did this to help break the seal between the metal cap and aluminum stem. be careful. not sure where that line is between just right and too much. I did mine in steps. see #6
6. carefully use the vise grip (or adjustable) to see if the cap is loose enough to unscrew. if the stem is moving too the answer is no and repeat #4
It worked for me and hopefully for you. If I cut too far the results would have been a BIG issue. My backup was I had runflats and could at least get to the BMW dealer where they would have to take the tire off and put a new valve stem kit on so understand the downside and have a backup plan thought out. I lucked out and now have plastic caps.
INTERESTING NOTE: I immediately checked the pressure and all the tires where still good. wasn't sure about the TPMS but it is reliable. 35k miles and no air added. Perhaps the very tight caps where ironically responsible for this. Also, I read there are caps that will not seize and gels to prevent it. I did go 50k miles without an issue. Not ready to go there but may be in the future.
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Last edited by STILLCREEKMAN; 09-15-2013 at 10:26 AM. Reason: add pics
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  #72  
Old 09-15-2013, 10:46 AM
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My BMW 'logo' valve caps were stollen just in time! The dealer installed them as a 'gift' upon delivery of my E90.

I just checked the F30 and the caps are plastic.

Perhaps the other precautionary tale should be that if your valve cores are ever removed by a tire dealer for service (balancing, tire repair...) and you have nickel plated valve cores in the TPMS, make sure they don't accidentally put a brass valve core back into the unit.
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  #73  
Old 09-15-2013, 10:51 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by STILLCREEKMAN View Post
I read this too late. However, my brand new 2010 X5d came with chrome valve caps. up to 50k miles had no issues. new tires installed at 50k (Dec '12) and tire shop (Sears) reused everything. at 60k ( 2 months later) had oil changed and valve caps could not be removed!

Galvanic corrosion is a terrible, merciless foe!

Solution: Black plastic caps.

Advantages:
  • Inexpensive
  • No potential to corrode
  • Widely available if case of loss
  • Nobody sees 'em, so who cares?
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  #74  
Old 09-15-2013, 10:53 AM
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.

Alternative: Green plastic caps

Advantages:
  • Same as above
  • Plus, you are too cool for words! Think: Nitrogen
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  #75  
Old 09-15-2013, 11:00 AM
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Quote:
Originally Posted by CALWATERBOY View Post
.

Alternative: Green plastic caps

Advantages:
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Express yourself!
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