Thread pitch on oil inlet 6265 turbo

[87turbot-type]

I just noticed that I don't have an oil inlet fitting on my turbo. It's journal bearing precision 6265. Does anyone know the thread size on this fitting so I can order one locally.

I searched and found that it might be 7/16-24 but that looks like it would be too big. 1/8NPT starts but I'm not putting one in until I know the size is correct.

Thanks Brandon.

 

[aminga]

post pics of what you do have

 

[87turbot-type]

I just don't have an oil inlet fitting. Didn't come with one from who I got it from.

Thanks Brandon.

 

[SCOOBY DOO]

I just don't have an oil inlet fitting. Didn't come with one from who I got it from.

Thanks Brandon.

Use the one from your 6131? Might be the same? Could check that one if it's the same.

 

[87turbot-type]

The one in the 6131 is a restrictor for a BB cartridge. Don't want to use a restrictor in the JB turbo.

Could you take yours out Brad and measure the size and pitch? If it's a big deal NP.

Thanks Brandon.

 

[SCOOBY DOO]

The one in the 6131 is a restrictor for a BB cartridge. Don't want to use a restrictor in the JB turbo.

Could you take yours out Brad and measure the size and pitch? If it's a big deal NP.

Thanks Brandon.

Give Norbs a call...he'll know. He may have one laying around. I'll give Dan a call...we may have one too.

 

[bison]

They are 1/8 npt which is tapered and will get tight as it's threaded in. If the bearing housing is a journal Garrett or a copy of a Garrett. Most aftermarket with ball bearing use restricted oil and either have a fitting that locates the bearing assembly or a Steiger thread fitting the threads into the top.

 

[87turbot-type]

Thank you Bison. I found an install sheet for a precision new ceramic ball bearing turbo. It also said that it was 1/8 NPT as well. They don't use a restrictor now on those ones from what it said. I remember on my old DBB turbo it stating not to remove the fitting. It must have been a centering one.

Thanks Brandon.

 

[bison]

Thank you Bison. I found an install sheet for a precision new ceramic ball bearing turbo. It also said that it was 1/8 NPT as well. They don't use a restrictor now on those ones from what it said. I remember on my old DBB turbo it stating not to remove the fitting. It must have been a centering one.

Thanks Brandon.

They do use restrictors on both of them. The old ones are Garrett style and use a tapered seat with female 1/8 not on one end. The later uses the fitting as a locator for the bearing assembly and also has a 1/8 npt female on the visible end.

 

[87turbot-type]

They do use restrictors on both of them. The old ones are Garrett style and use a tapered seat with female 1/8 not on one end. The later uses the fitting as a locator for the bearing assembly and also has a 1/8 npt female on the visible end.

This was the page I found
http://www.treadstoneperformance.com/prod_imgs/installation/ul/install-28.pdf

 

[bison]

This was the page I found
http://www.treadstoneperformance.com/prod_imgs/installation/ul/install-28.pdf

The restrictor is in the steel fitting threaded into the bearing housing. The part that they tell you not to remove because it locates the bearing assembly has the restriction. Earlier Garrett style has restriction in the fitting that threads into housing by installer. Here are pics of both types Precision used:

The pic with the penny is the part that you are instructed not to remove the other pics are the early ones. The pen is a ball point Bic for reference. Both restrictions are .040" or slightly less. Don't have a gauge handy to measure with. Ignore the bottom pic. The app isn't very user friendly when uploading pics and can't delete it.

 

[87turbot-type]

Thanks for the info. Interesting stuff

Brandon