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Nad015
PostPosted: Sun Jul 26, 2015 5:50 pm 
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Any one ever tapped this hole so you can screw in a fitting?
[ img ]

The hole is 21mm, what tap and what fitting should I use, or what has anyone else used?

I'm a bit over the vent tube, I can't get it to seal, is there a piece of rubber or some other type of seal that slips over the vent tube or does it just sit in the hole??

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unfamilia
PostPosted: Tue Jul 28, 2015 11:48 am 
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I just use Welch plug
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Nad015
PostPosted: Tue Jul 28, 2015 4:00 pm 
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so you plug the vent hole with a welsh plug? Surely not, it needs to vent

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Nissanman
PostPosted: Tue Jul 28, 2015 6:29 pm 
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The tube is an interference fit.
I suggest using some Loctite Thread Sealer on it.
http://www.loctite.com.au/3320_AUE_HTML ... b=document

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Dave
PostPosted: Tue Jul 28, 2015 7:47 pm 
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If you want to tap it, 3/4" NPT or BSPT would do the trick. Drill hole out to 29/32" and tap it.

The "T" in NPT or BSPT is for "taper" so it will tighten up.

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unfamilia
PostPosted: Tue Jul 28, 2015 10:37 pm 
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Yep have blocked it on a couple of motors.
The way the sump flows through the front case and to rocker I was told would be fine.
I didn't block it on new motor as I found dipstick would pop out under high revs
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Nad015
PostPosted: Wed Jul 29, 2015 8:35 pm 
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thats interesting unfamila, although i wouldnt block it off myself.

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Nissanman
PostPosted: Wed Jul 29, 2015 8:39 pm 
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There is a gauze oil/air separator in the engine block that needs to vent out through the crankcase vent.
Attachment:
[ attachment ]
L series emissionsB (Large).jpg [ 164.12 KiB | Viewed 2999 times ]

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