Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Follow us on Facebook Follow us on Twitter
Results 1 to 6 of 6
  1. #1
    VIP Member VIP Member TWIN-SPINS's Avatar
    My Boats:
    05 cig 42 tiger,w/ 525
    Join Date
    Apr 2008
    Location
    grosse ile, mich
    Posts
    1,107

    Pressure Test Headers

    iam going to pressure test my headers in the spring,,,i want to know where iam at with this cmi headers (525 mercury marine headers),,,,will this pipe plug work,,,looking for inside diamater of headers at the collector,,,http://www.grainger.com/Grainger/CHE...ipe-Plug-1VNF7

  2. #2
    Orlandi Performance VIP Member brian41's Avatar
    My Boats:
    Baja 32 Caliber, 39 Ocean Express
    Join Date
    Mar 2002
    Location
    michigan
    Posts
    1,768
    You do not close off the end of the pipe to test them. You pressurize the water part of the headers with air and check for leaks.

  3. #3
    Registered
    My Boats:
    2013-338 Skater, Young Performance engines,w/Arnesons
    Join Date
    Jul 2007
    Location
    COAL CITY IL.
    Posts
    183
    Quote Originally Posted by brian41 View Post
    You do not close off the end of the pipe to test them. You pressurize the water part of the headers with air and check for leaks.
    i just checked mine last week,i did it with my water hose,35 psi of water,there should not be more than that in them.i hooked the water hose to the pipe on the bottom(water hose fits inside the 1 inch hose,attach with hose clamp)plug off other ends of bottom pipe.then i put a short piece of hose on the top of the header(were the u shaped hose dumps into the tail pipes)and installed a 3/4 water spicket in the end of the hose.then i stood the header uprite opened the upper spicket,turned on the water,let it run until all the air was pushed out the top,then shut the top spicket and let it build pressure.then checked inside for leaks.

  4. #4
    Platinum Member Platinum Member TomFTM's Avatar
    My Boats:
    37 Outerlimits,33 Fountain,42 Searay,18 Searay,13 Boston Whaler
    Join Date
    Dec 2000
    Location
    Glen Cove ,NY 11542
    Posts
    1,703
    Quote Originally Posted by Crazy Dayz Donzi View Post
    i just checked mine last week,i did it with my water hose,35 psi of water,there should not be more than that in them.i hooked the water hose to the pipe on the bottom(water hose fits inside the 1 inch hose,attach with hose clamp)plug off other ends of bottom pipe.then i put a short piece of hose on the top of the header(were the u shaped hose dumps into the tail pipes)and installed a 3/4 water spicket in the end of the hose.then i stood the header uprite opened the upper spicket,turned on the water,let it run until all the air was pushed out the top,then shut the top spicket and let it build pressure.then checked inside for leaks.
    that is the way to do it....

  5. #5
    VIP Member VIP Member TWIN-SPINS's Avatar
    My Boats:
    05 cig 42 tiger,w/ 525
    Join Date
    Apr 2008
    Location
    grosse ile, mich
    Posts
    1,107
    ok,, if the water empties into the tailpipe after the collector,,,this will make what iam trying to do easier,,,i want to just use air ,,like it do on a car radiator ,,,pump it up to a certain pressure and watch the gage for leaks,,,talked to cmi tech,,they thought it should work,,,,i am trying to do this with the headers on the boat,,,ifs there something i am missing,,, or could this work,,,now it the air test shows a leak then off they come,,,im doing this as a precaution only,,,did not have any isues last season

  6. #6
    Registered
    My Boats:
    77 donzi x18 92 formula 336 sr1
    Join Date
    Aug 2005
    Location
    Between A Womans Leggs in IL
    Posts
    5,928

    Fixx

    Quote Originally Posted by TWIN-SPINS View Post
    ok,, if the water empties into the tailpipe after the collector,,,this will make what iam trying to do easier,,,i want to just use air ,,like it do on a car radiator ,,,pump it up to a certain pressure and watch the gage for leaks,,,talked to cmi tech,,they thought it should work,,,,i am trying to do this with the headers on the boat,,,ifs there something i am missing,,, or could this work,,,now it the air test shows a leak then off they come,,,im doing this as a precaution only,,,did not have any isues last season
    take them off to test,,what if their is a leak and theirs still water in the header tubes? then it will get water in the cylinder..their is also a visual inspection before pressure testing..

    some headers will seep after they get hot so the visual inspection is also a good idea,,look for white spots in the inner tubes and rust build up in the cylinder heads..
    Last edited by FIXX; 03-06-2011 at 06:14 PM.


Posting Permissions

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


OSO Directory
All times are GMT -5. The time now is 04:50 PM.
Powered by vBulletin® Version 4.2.0
Copyright © 2014 vBulletin Solutions, Inc. All rights reserved.
Search Engine Optimization by vBSEO 3.6.1
Original Poster In Postbit provided by Original Poster In Postbit v1.0.0 (Free) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Copyright 2011 OffShoreOnly. All rights reserved.