I was doing my first porting job today, and I blew it. I cut into a water passage right where the casting is thinnest on the top of a secondary port. This is for my FD and I really don't want to shell out $300 for a new end housing. Anyone ever try to weld one of these?



I don't see anything wrong with doing this. It is not a stressed part and its surrounded by good metal. I really just have to make it water and (some) pressure tight. I figure use a nickle rod with my stick welder. I'll try to get it done with the least amount of heating to prevent warpage. If there is any slight warpage, i was going to lap it anyway.



Is this a good idea, or should I just by a new one?

Damn that sucks. This is the reason that when I did my own ports, I kept the intake consevative, because I didn't want to shell out $300.



It may work, but better rotor motor builder's need to chime in.

yea that might work..but then again. I probally would just buy a new end housing because that sounds like alot of work.

Do you want to save $300 now and have the chance of having to rebuild the motor again?

I guess that depends on how big a chance there is of it failing. If the chance of the weld popping is very slight, I think I'll go the cheap route. I'm just hoping that someone has tried this before, so I have an idea of what kind of chance I would be taking. I mean, people use J-B Weld on internal parts. Seems like a real weld on a small hole would hold up fine in this area of the plate.

Probably, i dont think many people have tried it so you might have to try it yourself.



To me it sounds like it should hold, maybe not as long as not welded but im no expert.

https://www.nopistons.com/forums/pub..._DIR#>/sad.png Got any pixs of this?

my machinest friedn once welded shut a break thru the water jacket on a rotor housing from an nsu spider motor once. they guy had extended the P port a little to high. I dont know exactly how he did it but it just looked like he built up the aluminum. im pretty sure it worked out ok.

Try to get in touch with ITO, I know some of the PR guys that uses JB weld to fix this....



I had the same problem on the primaries, since I was following the RB templates https://www.nopistons.com/forums/pub...1047683358.gif

I can't get a piture of it right away, but its almost in the same spot, but about 2 times bigger as the hole rx7tt95 put in his housing here: hole in housing



Glad to hear someone has heard of something similar being done before.