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Have a Fox Forx 100 on a Santa Cruz Blur with 400 miles on it. Has performed great. After a recent wet and muddy ride the fork has developed an audible "squishing" sound. The performance of the fork has not changed, just this audible squsihing sound most noticable on rebound. I called Fox and they suggested keeping the bike upside down to allow oil to run down to foam rings / seals. This did not correct the problem. Your thoughts / suggestions are greatly appreciate. Thank you in advance, Scott
 

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Dirt and grim worked past the seals somehow, and the seals were not elastic enough to close back around the gaps that were left. When your fork compresses it exausts air and when it extends it sucks it back in, this is not going to harm your fork, but other stuff is going to get into your fork and in the long term this can damage the internals (short term though don't fret).

The first thing to do would be to take the lowers off and "clean" the seals. Unfortunatly the seals may not show any sign of being "dirty" though, and this is not always sucessfull.

The 2nd step is to get new seals. There is a company called Enduro seals that makes seals for the Fox, they are supposedly better than stock. You could also order seals from fox. The third option is to order seals from a seal supplier. These are usually exactly the same as what comes in your fork stock, except instead of $30 bucks they are usually like $3 bucks (there's a huge markup on seals if you haven't noticed). The thing is that you have to have a store so you can bring the seal in, OR you have to know the OD/ID and height so you can order it online.

It's hard to say if it is the dust wipers or the oil-seals doing this though, I'd want to say that it's not the oil seals because if it was you should have some oil spewing about, but if air is going past the dust wipers it still has to get past/around the oil seals. Probably best to just replace both.
 

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Thank you for the detailed advice. Your time and expertise are greatly appreciated. Scott

Jm. said:
Dirt and grim worked past the seals somehow, and the seals were not elastic enough to close back around the gaps that were left. When your fork compresses it exausts air and when it extends it sucks it back in, this is not going to harm your fork, but other stuff is going to get into your fork and in the long term this can damage the internals (short term though don't fret).

The first thing to do would be to take the lowers off and "clean" the seals. Unfortunatly the seals may not show any sign of being "dirty" though, and this is not always sucessfull.

The 2nd step is to get new seals. There is a company called Enduro seals that makes seals for the Fox, they are supposedly better than stock. You could also order seals from fox. The third option is to order seals from a seal supplier. These are usually exactly the same as what comes in your fork stock, except instead of $30 bucks they are usually like $3 bucks (there's a huge markup on seals if you haven't noticed). The thing is that you have to have a store so you can bring the seal in, OR you have to know the OD/ID and height so you can order it online.

It's hard to say if it is the dust wipers or the oil-seals doing this though, I'd want to say that it's not the oil seals because if it was you should have some oil spewing about, but if air is going past the dust wipers it still has to get past/around the oil seals. Probably best to just replace both.
 

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Thanks for the mention...

Jm. said:
It's hard to say if it is the dust wipers or the oil-seals doing this though, I'd want to say that it's not the oil seals because if it was you should have some oil spewing about, but if air is going past the dust wipers it still has to get past/around the oil seals. Probably best to just replace both.
Jm., thanks for the mentioning the Enduros. BTW, part of the problem with the Fox is that they have one-piece combo seal/wiper instead of a separate oil seal and wiper. Under this is just a foam ring. Interesting point you bring up about letting air in but not oil out. That's kind of weird...

-Chris
http://www.enduroforkseals.com/
 
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