5513 water test failed

[R.W.T.]

No real way to tell.

If it's leaking at the crown...as people have said, it could be tube at case, gaskets in crown, crown, or tube.

In a case like this I would drop the movement out and try and find the issue through trial and error.

If the crown is a twin lok, then there isn't a gasket on the outside of the tube. Generally, okay....we aren't going diving with this watch. Rolex would change the tube and crown at every service to insure water resistance to spec. Some people would prefer an original twin lok to a trip lok. Fine. Generally the crown will not be so bad that it won't work if you put a new fresh tube in. The 700 crown doesn't strip out the threads or wear them out very often. After all the watch is automatic and keeps good time. One hardly opens the crown compared to a hand wind watch. The clutch goes bad before that happens mostly. The threads on the tube if they are new will usually provide good enough seal provided the gaskets in the crown and the inner tube gaskets are fresh. Every situation is different when you are dealing with a vintage watch and trying to retain vintage parts. Once you have established that you can get a good seal empty then you can re case it and try it assembled. The new plexi may be leaking right by the crown and making it seem like the crown is leaking. This could be because the bezel retainer has stretched. This can be especially problematic if aftermarket crystals are used and then you go back to Rolex made. I was told by my watchmaking mentor. Like I said every situation is different. This is why Rolex stacks the deck in their favor. They replace it all. Then they don't have issues, and they use the newest and best parts per their research. We tend to like original style stuff. The water resistance and term of that resistance has definitely been improved upon since the watch was built. It's a choice and it takes some persistence and vigilance and willingness to be at a greater risk possibly.