Big Bores Leaking?

[mattf]

Do big bore shocks leak under the cap? Somebody told me that they do and you have to seal it with a certain sealant, is this true?

Matt

[crashbot2001]

Mine leak sometimes.. I usually crank them real tight, and this usually does the trick, but sometimes they still leak.. I haven;t tried the sealant, but now I might.

[tony_250r]

No, you don't need to seal them. Just make sure to place the rubber diaphragm with the dimple side up, and don't over tighten the shack cap. Make sure that the piston is not cutting the rubber diaphragm when the shock is fully compressed.

If the piston travels all the way to the diaphragm, it pinches the rubber diaphragm between the cap and piston, which cuts the rubber diaphragm causing a leak.

To fix this, limit the piston travel by tightening up the rod end and make sure you’re using the right length shock shafts. If a shock shaft is used that's to long, nothing will stop damaging the diaphragm.

[Speedy pede2]

some tefelon tape around the threads also does wonders;)

[nitro-pede]

nope my big bores have never leaked, just make sure you srew the lid on tight and they should be leak free

[mattf]

Thanks, I just heard that from a friend and didn't know if it was true. I'll get mine as soon as Tower gets them in stock.

[nitroman3655]

Only my front ones leak. I have rebuilt them, and still leak. Kinda gets messy, but I can't do anything about it. Mine don't leak at the threads, they leak at the bottom of the shock, where the shaft enters the shock. As i said, i have already rebuilt them and replaced those O-rings at the bottom of the shock. Oh well, as long as LHS sells Shock oil, i'm gonna run it till the wheels fall off.

[Tazz R/C owner]

nitroman, are your shock shafts all scratched up?
If they are, that's what's causing it to leak.

[nitroman3655]

nope, they are as smooth , also, they have always leaked, even when i got them. Oh well.