94 SPX Welch Plug Leak - Will Have to TIG I guess......

[randomguy]

Guys -

A few of you made some suggestions in an earlier thread about a leaky plug in the case of my Rotax 657. Over the past couple weeks, I've tried both a 2-part epoxy and Yamabond #4 to seal around the inside seam of the plug. Neither worked to sufficiently seal her up.

I work in manufacturing, so I don't think I'll to ask around too long to find someone who can TIG it for me. But I have one nagging question.....

Should I tear this whole thing down again to do this, including the RV? I've already got the cases sealed and stuff, obviously. As you can probably guess, I'd rather not. Do you think that could be welded quickly enough to not worry about the heat transfer?

What are your guys' thoughts?

Thx!

 

[Dr Honda]

There are rubber seals, and bearings WAY too close to that for me to say to weld it together. (sorry)

 

[Bills86e]

NO, it can be tigged to seal it. More than likely it leaked from the factory. There is nothing to eat away inside not like the welsh plugs on an
exhaust that gets seawater ect thru it. A leak there could be done by a torch and magneseum rod. dremel brush the paint so a guy can see
where to meld.

Bills86e

 

[randomguy]

Bill - I know it can be tigged to seal it up. The question is, should I disassemble the whole engine to do it? Or could I get away with just pulling the RV shaft assembly out and leave the rest of the engine intact?

Thx!

NO, it can be tigged to seal it. More than likely it leaked from the factory. There is nothing to eat away inside not like the welsh plugs on an
exhaust that gets seawater ect thru it. A leak there could be done by a torch and magneseum rod. dremel brush the paint so a guy can see
where to meld.

Bills86e