UK, that's the PERFECT set up.

Over here we have the un-ending joy of trying to fit SAE to the world's standard, metric. I'm pretty sure this falls on our government's shoulders.. kinda like a modern tower of Babel.

I picked up the 3/8" NPT steel close nipple today and only two threads thread into the turbo body! Good news is it looks like it will take care of the alignment problems, but not the vacc connection under the TB.

Taping the turbo body is not an option, next best?

 

Oh yes looked back at your pics the bit I used has been machined flat on yours (there was a proud rectangle few mm thick. Invest in a spare?
Tony

 

Dont know how hot it gets, how about some sort of epoxy weld? Not pretty but hard to see anyway
Tony

 

*EDIT*, since my edit function does not work..

I dodged a bullet today by using my K26 on the bench to "cut" the 3/8" adapters for the cooling line, the pic explains the rest.

And I thought I was home free after picking up the adapter (lowest in the photo) at the local Parker Store. The nipple and sleeve assy (midway up on the lefthand side) had already been re-sized using the k26 and the fit looked good but it was too long. But during the re-sizing I herd a faint crack that had me inspecting the brass nipple, I should have known it was the cast iron that failed. BTW, I had plenty of anti-seize and went slow during the cut.

For those of you that are considering, or have used this procedure, FIND ANOTHER METHOD.

I'm not sure if a 16x1.5 tap will cut the threads correctly but at Snap on they're $18, something has to be better than ruining a k26 body for this.

 

Kevin, it a shame. Why were you tapping the turbo? This might be a bit late for you, but others might benefit.

- It's much simpler to rethread the NPT fitting to 16x1.5..
- Some use the fitting as is (NPT) it holds fine - not the best approach but will do.
- Machining a 16x1.5 fiting from a stock brass is another option, but requires acces to a machinist. This is what we ended up doing for the VR turbos.

 

I wasn't tapping the turbo, I was in the process of using an NPT fitting, which serveral here have suggested. I am pretty damn happy I didn't pull this stunt on my newly reinstalled turbo!!!

Will a 3/8" NPT rethread correctly to a 16x1.5mm?

That's really the only good "half assed" method.

 

Kevin, sorry to hear about your troubles. Were you using brass?

OZ951 was the first person that I knew of to use this method, I know several others who did, plus we used it 3, maybe 4 times now, as I just did Rhobs car this way, but always using brass fitting.

 

FYI, McMaster-Carr has a M16x1.5mm die, #2573a68, for $14.56 that ships today.

 

Keep us updated and thanks for your work.

 

Nothing like doing it the right way.. Next, I'll cut a steel and that will be the end of the story!

The Mc Master boys really impressed me on this.

 

Intake plane's look much better and I like the one piece vice two approach. I can't wait to cut a steel one to replace the soft brass, but in the bigger picture, I have to op test the work on the new plant.