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PSA for anyone with a Boundary oil pump

 
Old 07-01-2018, 11:20 AM
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Default PSA for anyone with a Boundary oil pump

First off let me say that it's nice to have a company that will build you a bulletproof pump. However, after I built my engine I noticed a small oil leak from the pump. After investigation it was the Allen head plug that seals the high pressure port. Boundary doesn't use the correct plug, and they don't use sealant. Mine was leaking. I took the OEM plug out of my old pump and it's tapered where the one boundary gives you is not. Installed the oem plug with liquid Teflon, and viola no more leak. Hope this helps someone building an engine, check this plug before you install it.
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Old 07-01-2018, 11:28 AM
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I also noticed on shibby's car that the threads felt parallel, which could keep tightening until it was recessed in the housing.

Thanks for the heads up.


Shibby oil drops?
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Old 07-01-2018, 11:33 AM
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1/4" npt?
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Old 07-01-2018, 11:43 AM
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Originally Posted by psyber_0ptix View Post
I also noticed on shibby's car that the threads felt parallel, which could keep tightening until it was recessed in the housing.

Thanks for the heads up.


Shibby oil drops?
Yessir that's exactly it, the plug boundary gives you is just straight threaded the OEM is pipe thread I believe . You might get sealing with the boundary plug if you use sealant

Last edited by andyfloyd; 07-01-2018 at 12:31 PM.
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Old 07-01-2018, 11:44 AM
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Originally Posted by psyber_0ptix View Post
1/4" npt?
I believe so, the plug head OEM is 1/4" hex, the boundary plug is 6mm. Not 100% on the thread pitch
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Old 07-01-2018, 12:10 PM
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This is what you're referring to right?

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Old 07-01-2018, 12:31 PM
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Originally Posted by ridethecliche View Post
This is what you're referring to right?


yessir
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Old 07-01-2018, 03:48 PM
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Good to know I'll have to vehck mine
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Old 07-01-2018, 04:13 PM
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It'd be really weird if they shipped with a set screw instead of a tapered threaded plug. If BE keeps the stock thread size, it's actually 1/4BSPT, which may look straighter if you're comparing to a 1/4" NPT. There is such a thing as BSPP, parallel threads, but they require an O-ring to seal, so I can't imagine they'd even make BSPP plugs.
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Old 07-01-2018, 04:18 PM
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Originally Posted by curly View Post
It'd be really weird if they shipped with a set screw instead of a tapered threaded plug. If BE keeps the stock thread size, it's actually 1/4BSPT, which may look straighter if you're comparing to a 1/4" NPT. There is such a thing as BSPP, parallel threads, but they require an O-ring to seal, so I can't imagine they'd even make BSPP plugs.
I don't have a side by side picture but I can tell you whatever BE sends you keeps threading in never seems to tighten, the OEM plug definitely gets tight and it's tapered. The BE plug definitely leaks pretty bad.
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Old 07-01-2018, 05:46 PM
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Mine was loose too. Used the BE plug but with sealant. And tighten.
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Old 07-01-2018, 05:58 PM
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Originally Posted by curly View Post
It'd be really weird if they shipped with a set screw instead of a tapered threaded plug. If BE keeps the stock thread size, it's actually 1/4BSPT, which may look straighter if you're comparing to a 1/4" NPT. There is such a thing as BSPP, parallel threads, but they require an O-ring to seal, so I can't imagine they'd even make BSPP plugs.
NPT and BSPT are the same taper angle, 1" diameter per 16" of length. The threads are different, though.
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Old 07-02-2018, 01:02 PM
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Just pulled my NIB pump out of the box and confirmed I have the same plug based on appearance alone. Pump has not been removed from the bag yet.
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Old 07-02-2018, 01:10 PM
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Originally Posted by Der_Idiot View Post
Just pulled my NIB pump out of the box and confirmed I have the same plug based on appearance alone. Pump has not been removed from the bag yet.
I would pull the plug off your old OEM pump and reinstall on the BE pump with Teflon paste and win at life
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Old 07-02-2018, 02:31 PM
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Originally Posted by andyfloyd View Post
I would pull the plug off your old OEM pump and reinstall on the BE pump with Teflon paste and win at life
Sure, why would anyone think the only 2 parts (plug + seal), other than the gear that were replaced could possibly be sub-standard.
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Old 07-02-2018, 02:39 PM
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Originally Posted by bahurd View Post
Sure, why would anyone think the only 2 parts (plug + seal), other than the gear that were replaced could possibly be sub-standard.
Totally man it makes ZERO sense. I love the pump but I mean WHY use a shitty crank seal and some random plug? Makes no sense to me at all
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Old 07-03-2018, 09:04 AM
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Originally Posted by andyfloyd View Post
Totally man it makes ZERO sense. I love the pump but I mean WHY use a shitty crank seal and some random plug? Makes no sense to me at all
Likely it is done by their supplier to save money without letting Boundary know. Either that or they were told "It'll work and save money"
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