I can’t seem to get my shocks to stop leaking, even with new shafts and seals. What’s the problem?
It’s normal for dirt to stick to a film of oil where the shaft exits the shock body, but if there’s enough oil to wet the outside of the shock or drip down the shafts, that’s a problem. When installing seals, lube them with a seal grease such as Protek R/C’S Premier Blue. If you don’t have seal lube, at least coat the seals liberally with shock oil before installing them in the body or seal cartridge. Before threading the seal cartridge or cap onto the body, make sure the threads are perfectly clean and undamaged—a stripped thread or grit caught in the threads can create a path for oil to leak out. Tighten the cartridge or cap only until it’s fully seated and snug against the shock body. Further tightening may deform it, causing a leak. If the source of the leak is oil seeping past the threads of the shock cap/cartridge even after you’ve done all the steps above, try wrapping the threads with Teflon tape. You can find it in the plumbing section of your local hardware store.
Clean the shocks thoroughly before installing new seals.
At a minimum, the seals should be lubed with shock fluid before installation.
If oil is leaking past the seal-cartridge threads, wrap them with Teflon tape.