Dust Caps

[madtheswine]

Anyone had a problem with changing their dust caps. I changed mine a while ago for metal ones and today my Tyre pressure monitor showed by back rear left tyre was low. So I went to inflate it and the cap had locked onto the valve and then the whole valve came out leaving my tyre totally flat, luckily I have a space saver wheel.

 

[Wighty]

Guessing it's a chemical reaction between different metals ? Plastic ones are your friend

 

[EmilysDad]

...Plastic ones are your friend

Or a wipe of grease on the threads

(but that's easy to say now in hind sight )

 

[LostKiwi]

Or a wipe of grease on the threads

(but that's easy to say now in hind sight )

This. Copper grease is the cure.

 

[Blobcat]

I have known it on motorcycles if owners put in large “vanity” dust caps hat they can bend the valve over at high speed causing loss of pressure. Don’t honk yours are heavy enough for that to be an issue though.

 

[PovertySpec]

Had one seize on me despite putting a smear of Vaseline on it. The other three were fine.

I didn't try too hard to release it in case I pulled the valve out!

£10 and a few laughs to swap the valve at my local tyre place.

It is a very common job apparently.

 

[vtaylor78]

More trouble that they are worth, I’ve tried greasing regularly etc and they can still not budge.
I just stick to plane old plastic ones now, plus no one tries to steel them.

 

[John Laidlaw]

I did have metals on my 63 but I sprayed the threads over with PTFE grease weekly and no problem , however nice plastic ones are the answer

 

[JDPEClassUK]

There are nice plastic MB ones now. Look as good as metal but don’t get stuck.


Sent from my iPhone using Tapatalk

 

[RhodieBill]

Just make sure the ones you fit have brass inserts as the threads - NOT Aluminium as this will bond with the thread of the Valve.

I bought these type - no problem! https://www.ebay.co.uk/itm/323781304313?ViewItem=&item=323781304313

 

[Dean Fletcher]

My AMG dust caps give me an extra 20bhp.

 

[John Laidlaw]

My AMG dust caps give me an extra 20bhp.

Per wheel!

 

[EmilysDad]

Per wheel!

 

[Srdl]

Just checked mine and all came off without a problem but will make this a regular check from now on.

 

[daibevan]

More trouble that they are worth, I’ve tried greasing regularly etc and they can still not budge.
I just stick to plane old plastic ones now, plus no one tries to steel them.

+1

 

[madtheswine]

Plastic ones been bought, but still hesitant to remove the front two in case I pull the valve out.

 

[vtaylor78]

Plastic ones been bought, but still hesitant to remove the front two in case I pull the valve out.

Just get a pair of grips on the valve to hold it in place , and use another pair to turn dust cap, maybe a drop of WD before hand.
If you’ve get a second pair of hands all the better.