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Old 04-18-2017, 08:56 PM   #1
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Default That pesky water nipple (aka the cursed water plug)

Spent some time with a trashed head today. Propane and an air hammer made short work of removing this thing.





18mm hole. So either use an 18mm freeze plug (Mellings MPC-204B, Dorman 565-102) or drill it and tap for M20x1.5 (18.5mm drill bit) Or M20x2? And not have to drill





Hole above it is M12x1.5 if you want to do anything weird with that




Taint size is just under 14mm



Hope this helps someone down the line. I'll update with how I plug mine.

concealer404
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Old 04-18-2017, 08:59 PM   #2
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Y u tag me.


Also: I told you so!
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Old 04-18-2017, 09:26 PM   #3
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I used a large hex set screw with a coating of jb weld in my build:

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Old 04-18-2017, 09:27 PM   #4
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Any idea on thread size?
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Old 04-18-2017, 09:37 PM   #5
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Quote:
Originally Posted by aidandj View Post
Any idea on thread size?
Thank goodness for gmail archives saving all my previous parts orders:

McMaster-Carr Alloy Steel Cup Point Socket Set Screw, 3/4"-16 Thread, 3/4" Length, packs of 5

IIRC it was a slightly undersized fit but the tap was a lot cheaper than the one that was a slightly better size (this was 5 years ago). I used the JB weld just to make sure it stayed in and didn't leak.
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Old 04-19-2017, 09:36 AM   #6
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quick question: why would you want to remove that barb? Doesn't it feed water to the oil warmer sandwich plate + throttle body?
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Old 04-19-2017, 09:44 AM   #7
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quick question: why would you want to remove that barb? Doesn't it feed water to the oil warmer sandwich plate + throttle body?
That is both the question and the answer.
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Old 04-19-2017, 09:44 AM   #8
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I don't have either of those. And the nipple is known to leak.

It's also very close in size to 1/2npt.
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Old 04-19-2017, 09:47 AM   #9
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And it makes reroutes awful.
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Old 04-19-2017, 10:19 AM   #10
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Quote:
Originally Posted by concealer404 View Post
That is both the question and the answer.
well, mine doesn't leak, and on my setup the water line runs from the barb at the back of the head to the oil warmer, to the throttle body, and from there to the turbo. No problems with the coolant reroute either.
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Old 04-19-2017, 10:21 AM   #11
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Originally Posted by Eunos91 View Post
well, mine doesn't leak, and on my setup the water line runs from the barb at the back of the head to the oil warmer, to the throttle body, and from there to the turbo. No problems with the coolant reroute either.
Cool.

That's not the case for everyone. My TB doesn't even have water ports. And my oil warmer doesn't either.
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Old 04-19-2017, 10:25 AM   #12
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Quote:
Originally Posted by Eunos91 View Post
well, mine doesn't leak, and on my setup the water line runs from the barb at the back of the head to the oil warmer, to the throttle body, and from there to the turbo. No problems with the coolant reroute either.
Guess this isn't a relevant thread for you.
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Old 04-19-2017, 10:25 AM   #13
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Quote:
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Any idea on thread size?
Quote:
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3/4"-16 Thread
Told ya, Bitch!
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Old 04-19-2017, 10:26 AM   #14
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aye, thanks. Just wanted to clear this up before I finish the installation of my engine
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Old 04-19-2017, 10:27 AM   #15
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aye, thanks. Just wanted to clear this up before I finish the installation of my engine
Its known as the cursed nipple because if it leaks its damn near impossible to reach with the engine in the car. And if its never been replaced it could be about to blow
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Old 04-19-2017, 11:46 AM   #16
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ahhhh, so you guys have a rubber cap on there which fails? So it's not the metal elbow itself that's leaking? Got it. I'm running brand new silicone hoses everywhere, so as you said I'm not concerned
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Old 04-19-2017, 11:51 AM   #17
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Some people have a cap. Some people have a hose. I don't want either.
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Old 04-21-2017, 02:33 AM   #18
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How i plugged mine. 23/32nd drill bit. 1/2npt tap.



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Old 04-21-2017, 06:58 PM   #19
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Aidan, this is an NA/BP05 thing right?
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Old 04-21-2017, 07:21 PM   #20
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Both BP05 and BPVE are pictured in this thread
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