Big Block Chevy oil pressure fitting???
+ Reply to Thread
Results 1 to 10 of 10

Thread:
Big Block Chevy oil pressure fitting???

  1. #1
    New here Beer:30's Avatar
    Join Date
    Feb 2008
    Location
    Bakersfield, CA
    Posts
    4,219

    Default Big Block Chevy oil pressure fitting???

    Ok, the block is a circa-1974 "959" replacement 454. Above the oil filter, there are TWO oil plugs. One large, one smaller. The larger one is toward the REAR of the motor / the smaller one is just forward of that one. This is the first BB I have put together in awhile. All of the older ones were early blocks with only one outlet in that area.

    So, my question is, WHICH one is best to use for the oil pressure sender?? I would assume these are for oil-cooler and one must be inlet? I would be looking for which one is the OUTLET. I have been searching, but haven't found specific ID's for these plugs.

    Thanks.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member
    Join Date
    Feb 2009
    Location
    MANTECA
    Posts
    511

    Default Sender Outlet

    If you look at the oil filter from the side of the block, there is a 3/8" F.P.T. tapped hole centered above the filter. Thats where my oil pressure is measured from. Not positive but I believe that the blocks that came with a factory oil cooler or remote filter provision had two holes that were tapped for 1/2" F.P.T. I hope this helps you.

    Chris

  4. #3
    New here Beer:30's Avatar
    Join Date
    Feb 2008
    Location
    Bakersfield, CA
    Posts
    4,219

    Default

    Quote Originally Posted by bigdog View Post
    If you look at the oil filter from the side of the block, there is a 3/8" F.P.T. tapped hole centered above the filter. Thats where my oil pressure is measured from. Not positive but I believe that the blocks that came with a factory oil cooler or remote filter provision had two holes that were tapped for 1/2" F.P.T. I hope this helps you.

    Chris
    I'll throw up a pic later, but one is bigger than the other. I seem to recall the one straight above the middle of the filter area is the one - like you said. Just need to get fittings to put the sender setup together and need to know when one to seal up.

    Thanks for the help.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    mo balls than $cents$ IMPATIENT 1's Avatar
    Join Date
    Dec 2007
    Location
    hugo,okla
    Posts
    11,729

    Default

    pull 1 of the plugs out with the oil filter off, put alil air pressure to it and which every 1 shoots air outta the filter mount is the 1 to use.

    Dare to be different, if it turns out great you can claim you planned it that way.

    Jetboatperformance.com

  7. #5
    LP-25.com Infomaniac's Avatar
    Join Date
    Dec 2007
    Location
    New Port Richey, FL
    Posts
    16,855

    Default

    One of them is a threaded hole for a clutch linkage ball. It doesnt go into an oil passage.
    If For Some Reason I Do Something Worthy Of Recognition. God Provided The Ability And Deserves The Credit.


    QE 439 Twin Turbo

  8. #6
    New here Beer:30's Avatar
    Join Date
    Feb 2008
    Location
    Bakersfield, CA
    Posts
    4,219

    Default

    Quote Originally Posted by Infomaniac View Post
    One of them is a threaded hole for a clutch linkage ball. It doesnt go into an oil passage.
    No, not that one.

    Here's a pic. I am certain it's the larger of the two. The one most centered above the filter boss. Just want to verify:

    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

  9. #7
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Quote Originally Posted by Infomaniac View Post
    One of them is a threaded hole for a clutch linkage ball. It doesnt go into an oil passage.
    No. Corvette and some truck and motor home blocks had a oil cooler passage built in as Beer 30 discribes. The clutch pivot is closer to the bell housing than the oil port. Its is also the only known dead sure external way to know if it is a 4bolt. No 2 bolts where built with that arrangement.

    Beer 30, the port that is almost dead center to the oil filter is the one you hook to. The one towards the front of the block was the return from the oil cooler. You can't use these ports for an oil cooler unless you have the diverting valve that went into the larger center port. Other wise the oil doesn't circulate thru the cooler.



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3
    Last edited by gn7; 10-26-2010 at 11:07 AM.

  10. #8
    LP-25.com Infomaniac's Avatar
    Join Date
    Dec 2007
    Location
    New Port Richey, FL
    Posts
    16,855

    Default

    Oh well it was worth a try. I shouldnt be as direct with my posts.

    I've had folks try and read pressure from the clutch ball mount before.
    If For Some Reason I Do Something Worthy Of Recognition. God Provided The Ability And Deserves The Credit.


    QE 439 Twin Turbo

  11. #9
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Better yet, a friend tried to use the oil port as a clutch pivot in a street rod 10-15 years ago. He knew it was the oil port, but it lined up better and he thought he could use it. It dripped oil from the day he built it.
    Very few blocks have the multi port castings and i beieve it was only for a few years. but if you ever see one, it is in fact a 4 bolt. Of the 6 blocks I have in inventory, only one has the multi port layout, and it is from a LS6 Vette. The other thing you will always see on these blocks is the scalloped bores for the intake valves.



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3
    Last edited by gn7; 10-26-2010 at 11:53 AM.

  12. #10
    New here Beer:30's Avatar
    Join Date
    Feb 2008
    Location
    Bakersfield, CA
    Posts
    4,219

    Default

    Quote Originally Posted by gn7 View Post
    Better yet, a friend tried to use the oil port as a clutch pivot in a street rod 10-15 years ago. Very few blocks have the multi port castings and i beieve it was only for a few years. but if you ever see one, it is in fact a 4 bolt. Of the 6 blocks I have in inventory, only one has the multi port layout, and it is from a LS6 Vette. The other thing you will always see on these blocks is the scalloped bores for the intake valves.
    Thanks to all.

    No, cooler won't be used, so I'll plug the SMALLER, more FORWARD hole and get fittings/reducers for the rearward larger hole.

    This IS a 4-bolt block. It is now .060 over and has a .010/.010 "7115" L-88/ZL-1 crank inside and full-roller Comp valvetrain. Gonna be a dual-quad EFI street motor with a 4L80E behind it.

    Thanks again guys.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95