OIL LINE: swapping VVT head for a BP-4W
#1
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I wanted to get some advice: I installed a 2004 vvt engine into my 1990 and will be swapping the vvt head out for a bp-4w. As far as I can see (with the engine in the car and shining a flash light) the VVT oil feed comes off the block and the oil pressure sender threads into that oil line. The question is, can I just remove the oil feed that extends from the side of the block near the oil cooler and pressure sender and re-install the pressure sender or is there some BP-4W specific hardware that I need to buy?
thanks guys. Anyone want a 90k vvt head?
thanks guys. Anyone want a 90k vvt head?
#6
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Adapters will be a bit convoluted. It's tough to find BSPP->BSPT adapter as it's more common to go fron NPT to BSP.
Just throw on some Teflon paste and see if it holds. Some folks report using the parallel thread in the tapered hole just fine, I don't know if this holds true the other way.
If you did go with adapters, you'd be adding more failure points going from male bsp/male npt + npt union + npt male/bspt female.
Just throw on some Teflon paste and see if it holds. Some folks report using the parallel thread in the tapered hole just fine, I don't know if this holds true the other way.
If you did go with adapters, you'd be adding more failure points going from male bsp/male npt + npt union + npt male/bspt female.
#11
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Both senders are the same thread, tapered. It will thread into the parallel hole because it's the same thread pitch, but the parallel threads are sealed with a crush washer...because parallel threads.
Tapered is supposed to be self sealing (with some thread treatment). Conical shape will cause the threads to bind tightly under torsion to help sealing.
Tapered is supposed to be self sealing (with some thread treatment). Conical shape will cause the threads to bind tightly under torsion to help sealing.
Last edited by psyber_0ptix; 12-15-2015 at 09:10 AM.
#13
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The vvt oil feed connects to the block with parallel thread, sealed with crush washers. The gauge location on that hardline is tapered. All gauges are 1/8bspt (tapered) on the miata.
Most aftermarket gauges are 1/8npt (tapered). The difference between the npt and bspt/bspp thread is one thread in its thread pitch
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