what oil port on a bbc do i use for oil pres.
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what oil port on a bbc do i use for oil pres.

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    Senior Member OUTLAW HALLETT's Avatar
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    Default what oil port on a bbc do i use for oil pres.

    does it matter what oil port on the side of a bbc i use for the mech oil pressure gauge , i now have the large middle hole set up to do the job but before i run it i would like to make sure this is correct ive seen that some people are using the rear small hole, and i got a little nervous that i may have made a mistake thank you in advance

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    Default Large, middle?

    Quote Originally Posted by OUTLAW HALLETT View Post
    does it matter what oil port on the side of a bbc i use for the mech oil pressure gauge , i now have the large middle hole set up to do the job but before i run it i would like to make sure this is correct ive seen that some people are using the rear small hole, and i got a little nervous that i may have made a mistake thank you in advance
    Are you refering to the larger, 1/4 NPT on the side of the block, about in the middle? I think that hole is for a water petcock. You can pick up oil pressure just above the filter, or at any of the 1/8th pipe plugs along the main gallery....MP
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    Senior Member OUTLAW HALLETT's Avatar
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    sorry i ment the middle 3/4 in. pipe thread hole that is above the filter , there are three above the filter , and it is the one in the middle but thank you

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    jetboataholic HawaiianJet's Avatar
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    Quote Originally Posted by OUTLAW HALLETT View Post
    sorry i ment the middle 3/4 in. pipe thread hole that is above the filter , there are three above the filter , and it is the one in the middle but thank you
    Do you have any pictures?
    HJ

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    Cas
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    Billy,
    I use the 1/8" npt port on the upper forward side of the filter mount. I have a 45º brass fitting screwed in to the block and the sender screwed into the fitting. The reason is it gets the sender out of the way for R&R of the oil filter.
    Last edited by Cas; 05-31-2008 at 03:57 PM.

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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Any of the 3 should work. Turns out they are all attached to the same gallery, and, the oiling system being hydraulic, anywhere ahead of the crank in that main supply gallery would do just fine.

    Yea, like MP said, the middle hole in teh block along that rail, is into the cooling jacket, not the oil gallery, so THAT one won't work so good.
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    Quote Originally Posted by Cas View Post
    Billy,
    I use the 1/8" npt port on the upper forward side of the filter mount. I have a 45º brass fitting screwed in to the block and the sender screwed into the fitting. The reason is it gets the sender out of the way for R&R of the oil filter.
    That is the one I use, and is the one that I think is SUPPOPSED to be the sender port, or at least the most commonly used one.
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
    H.L. Mencken

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    The rest of us are being dragged along kicking and screaming.

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    jetboataholic HawaiianJet's Avatar
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    Quote Originally Posted by Cas View Post
    Billy,
    I use the 1/8" npt port on the upper forward side of the filter mount. I have a 45º brass fitting screwed in to the block and the sender screwed into the fitting. The reason is it gets the sender out of the way for R&R of the oil filter.
    That's the one I use too.

    The 45* thing is a great idea, I never thought about that. I just have it coming straight out.
    HJ

    ***FOR SALE*** 1978 19' Full Stringer Hawaiian Molokai Jet Boat w/ Berkeley 12JC-AB and Chevy 440 Tall Deck ***FOR SALE***

    Quote Originally Posted by mako shark mark View Post
    Oh yeah, Forgot to mention that the hull is a special mixture of speedcote, herculiner and rain-x, all blended together- good for another 8 mph top end.

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    Senior Member OUTLAW HALLETT's Avatar
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    i have my mech. line plumed into the middle 3/4 in, hole thank you all for the help , i know that the one on the middle of the block is for the petcock/water drain , but i should have been more specific

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    TEN THIRTY ONE RCB19's Avatar
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    If it is a production block the best place to take the oil pressure reading is from the furthest forward oil galley plug along oil pan rail LH side of the motor. This is the furthest and last point that the motor receives oil pressure so it is the truest reading. If you can't access that plug due to motor plates etc. use the next one back.
    RCB

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