Boundary pumps, what seal do they come with, pics inside
#22
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Every pump for the last 2 years is probably that design. If they are bad seals, I'll be getting a lot of phone calls. It could be a spot failure, or an issue caused by install. I would also look after your block, if you've align bored the block it moves the crank seal out of concentricity compared to crankshaft (pump remains pinned, but crank center moves).
The only issue I know of with leaking is the high pressure NPT plug on at least 2 units were loose. Which is an unexpected since we don't touch it. We're adding a quality step in to torque each one, so if you do have one my pumps I would highly recommend giving that a snug up.
No we weren't aiming at saving 10 dollars on any seals, if its not a problem we don't spend your money on it. If it becomes a problem we will look at upgrading, but I'm guessing this is isolated. Will keep ears to the ground though.
The only issue I know of with leaking is the high pressure NPT plug on at least 2 units were loose. Which is an unexpected since we don't touch it. We're adding a quality step in to torque each one, so if you do have one my pumps I would highly recommend giving that a snug up.
No we weren't aiming at saving 10 dollars on any seals, if its not a problem we don't spend your money on it. If it becomes a problem we will look at upgrading, but I'm guessing this is isolated. Will keep ears to the ground though.
#24
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Well, I did 6 units yesterday and we use a gasket form tool and a hammer driving it to pop them in. Usually takes a line up shot to get it started and at least 2 solid blows. I'd give you some serious cred if you could do that to any of the units here.
I'm not sure about this, maybe there were some that were defective? Its not going to be long until we literally have quality every single component on the Miata pump. I guess through volume we're running into oddball stuff at this point. It could also be the pressure we're putting on our casting and components manufacturer. Probably not normal to sell that amount of Miata pumps ever. I will check with them, if you have a sample one and could send it to me I can check it here to see what I can find.
I'm not sure about this, maybe there were some that were defective? Its not going to be long until we literally have quality every single component on the Miata pump. I guess through volume we're running into oddball stuff at this point. It could also be the pressure we're putting on our casting and components manufacturer. Probably not normal to sell that amount of Miata pumps ever. I will check with them, if you have a sample one and could send it to me I can check it here to see what I can find.
#27
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Replaced my front main yesterday. My thoughts echo Dan's. Seal that came in the Boundary pump was hard rubber, very little elasticity. OEM seal was softer rubber, much stretchier. Very different quality.
New FMS seems to have solved my oil leak. 60 miles leak free so far.
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I don't know if Travis's supplier switched on him or something. But as of now I would only run an OEM front seal.
New FMS seems to have solved my oil leak. 60 miles leak free so far.
![Name: L3RHv0K.jpg
Views: 1160
Size: 1.21 MB](https://www.miataturbo.net/attachments/engine-performance-56/230191d1683052239-boundary-pumps-what-seal-do-they-come-pics-inside-l3rhv0k.jpg)
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I don't know if Travis's supplier switched on him or something. But as of now I would only run an OEM front seal.
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I texted Travis when this thread came about, and he posted above. Hopefully he can take a look at it, but as of now I would not use a non-oem seal in a location like that.