HX35 oil feed thread size

[blackhawkgsx]

Hey guys i have been searching but have not been able to get a clear answer about the adapter needed for my holset hx35 oil feed i have ordered the extreme psi kit with the holset option and that adapter does not fit its way to small to thread in 12mmx1.5 to -4 an then a sales man at extreme psi told me the 1/4"npt to -4an would work but thats no good either can any one help?

 

[JusMX141]

Every HX35 I've ever seen is 12mm x 1.5. Post up some pics of your inlet if you can.

There's no way a 1/4" NPT fitting will thread into an unmodified 12mm x 1.5 hole. I've tapped the 12mm x 1.5 holes to fit 1/4" NPT fitting at customer's request, but this must only be done when the turbo is completely disassembled as it literally fills the center housing with metal.

 

[blackhawkgsx]

the blue on is the 12mmx1.5

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Almost fits

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[JusMX141]

You're forgetting to remove the Holset fitting from the housing.

Once you remove the big hex fitting that you're trying to thread all of these adapters into, you'll reveal a 12mm x 1.5 thread.

 

[blackhawkgsx]

Thanks in all the write ups ive seen no one said that part could be removed Thanks! I got every thing squared away now!

 

[turboglenn]

Justin, that fitting is cast into my housing on my turbo, what thread is it that goes in there??

I spoke with a diesel turbo tech that specializes in cummins/holset builds and got an explanation about housings a bunch of other good specs and holset "secrets" too but anyway, I don't have that removable fitting It's casst into my housing and the only thing that fits is a power steering reverse flare fitting, any idea the thread on that?

 

[Devilsfutbol17]

Also with that fitting, I've seen it can leak a little bit even if its fully tighted into the housing. I threw a copper washer around mine and its not leaking.

 

[JusMX141]

Justin, that fitting is cast into my housing on my turbo, what thread is it that goes in there?

You're kinda screwed- nothing that adapts to our cars will thread into that fitting.

What I've done in the past is drill and tap the flange to accept a T3 oil inlet adapter:

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[turboglenn]

Actually i go it under control, there's many fittings with that flare atthe local fastner warehouse, even in earls fittings, it's a very common power steering fitting and thread, can't recal the thread but iut's like 5/8ths flare or soemthing it's called and i can get adapters to -4 or about whatever i want which is nice to know

thanks for the help though