okoye
Well-known member
- Joined
- Jul 27, 2009
- Location
- Connecticut
Anyone know what size it is? I?d like to buy a tap to thread the original hole.
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turbo drain hole size?
- Thread starter okoye
- Start date
bobxyz
Board Member
- Joined
- Aug 29, 2014
- Location
- Boulder CO
If it's an unmolested factory turbo block, why not get a yoshifab adapter, or equivalent? Probably cheaper than a jumbo tap too.
https://yoshifab.com/store/turbo-red-block-10-oil-return-conversion-kit.html
https://yoshifab.com/store/turbo-red-block-10-oil-return-conversion-kit.html
Wren
Porkchop Sandwiches
- Joined
- Jun 29, 2006
- Location
- Athens, GA
If you're going to use an NPT tap, it will take a 3/4" to do anything.
Stiggy Pop
In the cool kids club
- Joined
- Feb 27, 2011
- Location
- Granville, MA
And you?ll need to pre drill it still
Just use the easy button: https://www.stsmachininginc.com/products/8-an-volvo-240-740-940-b21ft-b230ft-oil-drain-adapter
Are you sure with the 3/4" NPT Thread?
The bore diameter of such thread is 22,6mm, which seems a bit to small.
I measured the drain hole bigger diameter at 24,7mm
A 3/4" bsp thread could work, that one needs a 24,5mm hole.
Anyone done this already?
Seems to be a clean solution for me.
Nothing wrong with the stuff from the shops but why buy if you can build?
Edit:
Now i have read more about the differences between npt and bsp. Found that there are tapered versions as well.
So maybe i am wrong with the bore stated above.
Regards,
Dennis
The bore diameter of such thread is 22,6mm, which seems a bit to small.
I measured the drain hole bigger diameter at 24,7mm
A 3/4" bsp thread could work, that one needs a 24,5mm hole.
Anyone done this already?
Seems to be a clean solution for me.
Nothing wrong with the stuff from the shops but why buy if you can build?
Edit:
Now i have read more about the differences between npt and bsp. Found that there are tapered versions as well.
So maybe i am wrong with the bore stated above.
Regards,
Dennis
Last edited:
wujek
New member
- Joined
- Dec 1, 2015
- Location
- Lublin, Poland
DenK please make one for me - shipping overseas and customs kill the business.
thismachine13
New member
- Joined
- Sep 22, 2015
- Location
- Kansas City
Your block is at the machine shop?!?
Use the REAL easy button and have them drill/tap it whilst its there.
Easiest way to accomplish this.
Well, i honestly did not consider this before.
I think i have to make a call.
To speed things up, i do want a straight 3/4" thread, right?!
Stiggy Pop
In the cool kids club
- Joined
- Feb 27, 2011
- Location
- Granville, MA
Well, i honestly did not consider this before.
I think i have to make a call.
To speed things up, i do want a straight 3/4" thread, right?!
no. NPT is tapered by definition. It seals on the threads with teflon tape or RTV.
Use a straight thread if you want to get into trying to seal against an o-ring or a crush washer (you don't)