HOW TO: Tap Oil Pan for NA-T Turbo Return
#18
another question.
what size tap would you use if you didn't use a flange?
lets just say you want your oil return line going right into the pan with a -10an to npt fitting
what size hole would you drill? (I think 7/8ths right?)
and then use what tap? 3/4 npt?
what size tap would you use if you didn't use a flange?
lets just say you want your oil return line going right into the pan with a -10an to npt fitting
what size hole would you drill? (I think 7/8ths right?)
and then use what tap? 3/4 npt?
#19
Lexus Champion
iTrader: (10)
you will be hard pressed to fit a drill bit down there for a 3/4 tap unless its off the car, and if its off the car just go get a 1/2" or 3/4" bung welded on it. you most likely just need to do 1/2 npt as thats what most drain flanges have on them anyways, you know the one people bolt on.
there is not a lot of thickness to the center part that you drill out, so be carefull when tapping you will only get a few good threads but its enough to hold a fitting tight be sure to use thread sealant the liquid stuff in the white tube. it goes on all my oil fittings just spread it on the threads and tighten it in and allow to dry for 5-10 minutes and It will ensure you don't spring a leak. I think I have a 3/8 fitting on mine right now I didn't have the bit for the 1/2 at the time, something I plan to go back and fix and make it 1/2 npt.
for drill bit sizes just search google what size drill bit for 1/2 npt tap, thats what I do you will find lots of sites with charts.
I am seeing 23/32 or alternate bit is 3/4. only use the alternate if you can't get 23/32 as the first one is always closer.
there is not a lot of thickness to the center part that you drill out, so be carefull when tapping you will only get a few good threads but its enough to hold a fitting tight be sure to use thread sealant the liquid stuff in the white tube. it goes on all my oil fittings just spread it on the threads and tighten it in and allow to dry for 5-10 minutes and It will ensure you don't spring a leak. I think I have a 3/8 fitting on mine right now I didn't have the bit for the 1/2 at the time, something I plan to go back and fix and make it 1/2 npt.
for drill bit sizes just search google what size drill bit for 1/2 npt tap, thats what I do you will find lots of sites with charts.
I am seeing 23/32 or alternate bit is 3/4. only use the alternate if you can't get 23/32 as the first one is always closer.
#22
I'm probably going to take my pan off to do this since I have to change my oil pump to a crank sensor version anyway.
#23
Lexus Champion
iTrader: (10)
I would get it welded if the pan is coming off, but the only sizes that toyota uses for studs is M8 and M10, so its got to be one of those. I would just get a m8 and m10 nut and see which one threads on to verify. the m10's will look like the exhaust stud sizes, the m8's are a little smaller usually on the intake.
#26
Lexus Champion
iTrader: (14)
The other bad thing about using that is that it is on the opposite side of the motor. So you'd be running the oil drain around the motor, making it very long, near the fans and pullies, and possibly with a very weak slope. Poor oil drainage on a turbo can ruin a turbo/seals as the OP already delt with and cause turbo overheating as well.. The GS pan has a provision that isn't drilled, I would absolutely be using that instead, too bad you already put the motor in the car, because it would have been super easy to take the pan off with the motor on a stand to do it right.
#28
Pole Position
iTrader: (1)
Great write up Luxor!!
I wasn't sure which size to use?
Thank you!!!
I did make my own flange using steel plate and -10 an bung here are a couple of shots to share with you guys
and a turbo drain too, but it's not finished yet for ideas
can you post a pic of the actual turbo oils drain flange that's on the top of the drain hose only if you can, I'm stuck on it.
I wasn't sure which size to use?
Thank you!!!
I did make my own flange using steel plate and -10 an bung here are a couple of shots to share with you guys
and a turbo drain too, but it's not finished yet for ideas
can you post a pic of the actual turbo oils drain flange that's on the top of the drain hose only if you can, I'm stuck on it.
Last edited by LEXXIUM; 12-07-16 at 01:37 PM.
#30
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The flange holes seem to be smaller than my m8 drill bit and tap. Is it a m6 instead where I can just tap it Or do I actually have to drill with my m8 bit and then tap it ?