Oil Feed on Garrett GTX Turbo - Filter spec (microns)

[ENGINR]

Hey guys,

I'm using the Speedflow banjo bolt setup for the oil feed on my Garrett GTX3076 turbo (Speedflow part numbers are 300-05 for the 7/16"-24 bolt and 311-04 for the 7/16" banjo).

However when I go to install these parts into the oil feed on my turbo and do the banjo bolt up finger tight (with the 2 supplied alloy crush washers in position), the bolt bottoms out and leaves about 1mm between the top crush washer and the head of the bolt.

I know the turbo core has a raised 'seat' in the oil feed that I believe the banjo bolt is meant to seal on, but I just can't figure out what is causing this to happen. I am a bit cautious about just tightening the banjo bolt up and 'seeing what happens'.

How have you guys done the oil feed for your Garrett turbos? Have you had a similar problem?

 

[bazeng]

The bolt is too long and you are running out of thread. It also happens with the oil feed from the head with aftermarket fittings.

 

[ENGINR]

Ah! So can I cut the banjo bolt down a few threads?

 

[bazeng]

I've done it plenty of times. Just make sure it is clean when rere installing. You can run a drill bit by hand on the inside to get rid of any debris. Also run a larger diameter drill bit to take off the sharp edge after cutting.

 

[ENGINR]

Hey guys,

How fine an oil filter did you use in your garrett oil feed line? I have an aeroflow -4AN inline filter that has a 30, 80 and 150 micron filters to choose from using.

 

[bazeng]

Mine is quite large. Enough to filter large debris (never had anything come through yet). Approx 1mm gauge mesh.

 

[EVO-00X]

http://store.forcedperformance.net/PROD/FP4ANFilter.html