Water pressure regulator
+ Reply to Thread
Results 1 to 9 of 9

Thread:
Water pressure regulator

  1. #1
    Member
    Join Date
    May 2010
    Location
    SoCal
    Posts
    45

    Default Water pressure regulator

    So, i have a 455 olds in my Tahiti, and the last few weeks i keep seeing threads about all sorts of water issues resulting from to much pressure from the pump. Will a regulator from Home Cheapo do the trick? My boat is very mild, but I really dont want to deal with water in the oil and such. The motor has about 2hrs on it. On another note, im getting a small oil leak right where the head, the intake manifold, and block all come together. I was wondering if thats just a simple RTV fix? I heard that the valley pan and assorted gaskets around that area on the 455olds are notoriously leaky. Its such a small amount, but it makes a mess...any ideas would help. I really dont want to rip anything apart tomorrow night if I dont have to. My brother in law just said....add oil.

    Thanks again for everyone's help. You guys seem to help me through every issue Ive had, and I really appreciate it.

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member jetboatperformance's Avatar
    Join Date
    Dec 2007
    Location
    Atascadero Calif
    Posts
    7,464

    Default

    Quote Originally Posted by My73Tahiti View Post
    So, i have a 455 olds in my Tahiti, and the last few weeks i keep seeing threads about all sorts of water issues resulting from to much pressure from the pump. Will a regulator from Home Cheapo do the trick? My boat is very mild, but I really dont want to deal with water in the oil and such. The motor has about 2hrs on it. On another note, im getting a small oil leak right where the head, the intake manifold, and block all come together. I was wondering if thats just a simple RTV fix? I heard that the valley pan and assorted gaskets around that area on the 455olds are notoriously leaky. Its such a small amount, but it makes a mess...any ideas would help. I really dont want to rip anything apart tomorrow night if I dont have to. My brother in law just said....add oil.

    Thanks again for everyone's help. You guys seem to help me through every issue Ive had, and I really appreciate it.

    Typically the pressure regulators from a hardware stores wont allow a low enough setting to work properly without internal modification suggest you stick with the proven kits , RE leaks from the Olds intake manifold front and rear sealing surfaces are very common on this series engine and we never use the supplied "cork or neopreme" end seals but rather we "punch peen" the seal surfaces of the intake and block "end seal areas" thoughly clean and then use a thick bead of a product called Permatex right stuff to seal between block and intake . you failed to mention which intake you have but any after market aluminum intake will not seal properly with the OEM "turkey tray" (designed for iron Automobile intake manifolds) and taht combo will eventually leak (water in oil too!) The main reason for oil leaks on these motors is inadequate crankcase venting/breathing and/or excess crankcase pressure (blow by,a multitude of causes) taking the path of least resistance, Suppose simply adding oil to the motor is an easy way to deal with this Call if we can help Tom

  4. #3
    Senior Member H20MOFO's Avatar
    Join Date
    Dec 2007
    Posts
    4,288

    Default

    Quote Originally Posted by My73Tahiti View Post
    So, i have a 455 olds in my Tahiti, and the last few weeks i keep seeing threads about all sorts of water issues resulting from to much pressure from the pump. Will a regulator from Home Cheapo do the trick? My boat is very mild, but I really dont want to deal with water in the oil and such. The motor has about 2hrs on it. On another note, im getting a small oil leak right where the head, the intake manifold, and block all come together. I was wondering if thats just a simple RTV fix? I heard that the valley pan and assorted gaskets around that area on the 455olds are notoriously leaky. Its such a small amount, but it makes a mess...any ideas would help. I really dont want to rip anything apart tomorrow night if I dont have to. My brother in law just said....add oil.

    Thanks again for everyone's help. You guys seem to help me through every issue Ive had, and I really appreciate it.
    IMO...put a water pres gauge on it. I was amazed how freekin much water pressure was going through my block with the valve off the jet wide open. I run mine about half shut...and still see about 20 psi plus at wot. On the oil leak...did you use rtv/sillycone or the rubber end gaskets for the intake manifold?
    Edit; oops looks like Tom types faster than I.lol
    Last edited by H20MOFO; 08-11-2011 at 10:16 PM.
    Another Hot Boat refugee

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member bwurst1's Avatar
    Join Date
    Nov 2008
    Location
    Roseville CA.
    Posts
    379

    Default

    That "right stuff" is amazing not just a clever name. I use it on everything!!

  7. #5
    Senior Member
    Join Date
    Dec 2007
    Location
    Newbury Park, Ca/Mohave Valley, Az
    Posts
    8,169

    Default "IN" water

    Quote Originally Posted by H20MOFO View Post
    IMO...put a water pres gauge on it. I was amazed how freekin much water pressure was going through my block with the valve off the jet wide open. I run mine about half shut...and still see about 20 psi plus at wot. On the oil leak...did you use rtv/sillycone or the rubber end gaskets for the intake manifold?
    Edit; oops looks like Tom types faster than I.lol
    I went through this question back in the 80s. I was told then, and most experienced jet riggers will tell you today, do not reduce the "IN" side water. If you're building too much pressure "dump" it on the "out" side. In thirty years I've never ran any type of "IN" regulator, never even looked at "IN" pressure, and with a couple exceptions, never had any internal water leaks in engines. If you reduce the volume of "IN" water you take a chance of creating "air" pockets in the engine that will lead to expensive failures. Maybe opinions and technology have moved forward, but my two running jets now are wide open, un regulated water supplies, without any leaks or milky oil.... Admittedly, they do run cold, and are probably leaving a "little on the bench" when it comes to power, but you never hurt them "cold" or "fat".... Hot, or lean, can, and does take their tolls. If you're milking the oil find out why and fix it.....
    Ray
    LOUD BOATS SAVE LIVES

  8. #6
    Member
    Join Date
    May 2010
    Location
    SoCal
    Posts
    45

    Default

    All, Thanks for the advice. I think ill take it to the "desert yacht" guy in Yuma and let him fix the intake leak(its a crosswind), and also see what the deal is about the water pressure. Thanks again.

  9. #7
    Senior Member Luckie Stiff's Avatar
    Join Date
    Dec 2007
    Location
    Bakersfield
    Posts
    1,189

    Default

    Quote Originally Posted by Moneypit View Post
    Do not reduce the "IN" side water. If you're building too much pressure "dump" it on the "out" side. If you reduce the volume of "IN" water you take a chance of creating "air" pockets in the engine that will lead to expensive failures. Admittedly, they do run cold, and are probably leaving a "little on the bench" when it comes to power, but you never hurt them "cold" or "fat".... Hot, or lean, can, and does take their tolls. If you're milking the oil find out why and fix it.....
    Ray
    Exactly! Well put Ray. Lean is mean, I found that out the hard $$$ way. Now it's fat, cold & happy...
    "Don't you realize that there are already enough people in the world to hate without you putting in so much effort to give me another?"

  10. #8
    Junior Member
    Join Date
    Dec 2010
    Location
    South Bay
    Posts
    1

    Wink

    Check out Watts Plumbing they have a pressure regulator that's perfect for you
    Part number XB-65 3/4 in an out.
    You can adjust it down to 20psi with a pressure gauge that screws on the end of it.
    I never have had water in the oil again.
    Plus it keeps the engine running between 135-150 water temp!

  11. #9
    Senior Member H20MOFO's Avatar
    Join Date
    Dec 2007
    Posts
    4,288

    Default

    Quote Originally Posted by Moneypit View Post
    I went through this question back in the 80s. I was told then, and most experienced jet riggers will tell you today, do not reduce the "IN" side water. If you're building too much pressure "dump" it on the "out" side. In thirty years I've never ran any type of "IN" regulator, never even looked at "IN" pressure, and with a couple exceptions, never had any internal water leaks in engines. If you reduce the volume of "IN" water you take a chance of creating "air" pockets in the engine that will lead to expensive failures. Maybe opinions and technology have moved forward, but my two running jets now are wide open, un regulated water supplies, without any leaks or milky oil.... Admittedly, they do run cold, and are probably leaving a "little on the bench" when it comes to power, but you never hurt them "cold" or "fat".... Hot, or lean, can, and does take their tolls. If you're milking the oil find out why and fix it.....
    Ray
    I get about 25+ psi at full throttle. I'm good....more than one way to skin the "plumbing cat" for sure.
    Another Hot Boat refugee

+ 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


Tags for this Thread

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