As it says, I seem to have lost the nuts to the factory oil return line where it bolts to the front cover flange. Does anyone know off the top of their head what size nut it is? It's a two piece line. One part is the actually return on the turbo drain, then there is another piece that bolts to front cover. I need to know the Nut size where they mate. I had to cut the factory return line to fit my t51r kit. Any help would be great.

Thanks. Not a single nut I have laying around from the car fits. I think it's a wide thread m8. But I can't tell.

Regards.

 

 

12 mm head.

 

It looks like an M8 in your pic. Pick up a cheap hardware nut for a quarter or so and see if it fits.

 

the parts catalog shows bolts there, lol.

its an 8x1.25 nut with a 12mm hex, and it should have a small built in washer and a serration on the bottom, as the oil line is steel. the nuts that go to aluminum are flat bottomed.

the lower to upper intake nut is the same, except its for AL, so its flat bottom. i think the nuts that hold the brake booster to the car would be what you want.

Mazda number would be 9994-00-800

 

ahem,..the other 2 nuts holding it onto the engine are the same size as what you need to put on those studs!

 

Got it thanks! Anyways I ended up having to cut the other flange to make it work due to gravity. Turned out well.

 

i realized that last night. Haha I'm an idiot it was staring me in the face

 

Dude.,.if you can get your Face Down there..you got a real THIN FACE!..haha!.
(I cursed that spot..knuckle skinnin scratchin,bitchin spot!)

 

My bay is pretty cramped, although Moreso on the drivers side of the bay now. Even with the terminator 3 vmount it's still go more room than a stock bay. And I retained the ps and everything. I notched the middle part of the core support about 2 inches so I was able to move everything forward that much and it made a world of difference with the t51r kit.